From 1d7a86e664717d09e33371bc87c289903b19feb2 Mon Sep 17 00:00:00 2001
From: Stypox <stypox@pm.me>
Date: Thu, 9 Apr 2020 13:51:47 +0200
Subject: [PATCH] [Test] Add base classes for stream extractor tests

Refactor all stream extractor tests to use new base class.

Remove check if upload date is in the past: this does not have to hold true: youtube premieres turn up in search results even though they are in the future
---
 .../newpipe/extractor/ExtractorAsserts.java   |  14 +-
 .../services/BaseStreamExtractorTest.java     |  24 ++
 .../services/DefaultStreamExtractorTest.java  | 286 +++++++++++++++
 .../extractor/services/DefaultTests.java      |   4 +-
 .../MediaCCCStreamExtractorTest.java          | 214 +++++------
 .../PeertubeStreamExtractorDefaultTest.java   | 180 ----------
 .../peertube/PeertubeStreamExtractorTest.java | 165 +++++++++
 .../PeertubeTrendingExtractorTest.java        |   4 +-
 .../SoundcloudChartsExtractorTest.java        |   2 +-
 .../SoundcloudStreamExtractorDefaultTest.java | 163 ---------
 .../SoundcloudStreamExtractorTest.java        |  81 +++++
 ...utubeStreamExtractorAgeRestrictedTest.java | 157 ++-------
 ...utubeStreamExtractorControversialTest.java | 138 ++------
 .../YoutubeStreamExtractorDefaultTest.java    | 333 ++++++------------
 .../YoutubeStreamExtractorLivestreamTest.java | 155 ++------
 .../YoutubeStreamExtractorUnlistedTest.java   | 169 ++-------
 16 files changed, 883 insertions(+), 1206 deletions(-)
 create mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/BaseStreamExtractorTest.java
 create mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultStreamExtractorTest.java
 delete mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorDefaultTest.java
 create mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorTest.java
 delete mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorDefaultTest.java
 create mode 100644 extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorTest.java

diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/ExtractorAsserts.java b/extractor/src/test/java/org/schabi/newpipe/extractor/ExtractorAsserts.java
index 1006f7b34..a0a887d7d 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/ExtractorAsserts.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/ExtractorAsserts.java
@@ -1,12 +1,16 @@
 package org.schabi.newpipe.extractor;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.List;
 
-import static org.junit.Assert.*;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
 
 public class ExtractorAsserts {
     public static void assertEmptyErrors(String message, List<Throwable> errors) {
@@ -56,4 +60,8 @@ public class ExtractorAsserts {
             assertTrue(message, stringToCheck.isEmpty());
         }
     }
+
+    public static void assertAtLeast(long expected, long actual) {
+        assertTrue(actual + " is not at least " + expected, actual >= expected);
+    }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/BaseStreamExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/BaseStreamExtractorTest.java
new file mode 100644
index 000000000..fb555a033
--- /dev/null
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/BaseStreamExtractorTest.java
@@ -0,0 +1,24 @@
+package org.schabi.newpipe.extractor.services;
+
+public interface BaseStreamExtractorTest extends BaseExtractorTest {
+    void testStreamType() throws Exception;
+    void testUploaderName() throws Exception;
+    void testUploaderUrl() throws Exception;
+    void testUploaderAvatarUrl() throws Exception;
+    void testThumbnailUrl() throws Exception;
+    void testDescription() throws Exception;
+    void testLength() throws Exception;
+    void testTimestamp() throws Exception;
+    void testViewCount() throws Exception;
+    void testUploadDate() throws Exception;
+    void testTextualUploadDate() throws Exception;
+    void testLikeCount() throws Exception;
+    void testDislikeCount() throws Exception;
+    void testRelatedStreams() throws Exception;
+    void testAgeLimit() throws Exception;
+    void testErrorMessage() throws Exception;
+    void testAudioStreams() throws Exception;
+    void testVideoStreams() throws Exception;
+    void testSubtitles() throws Exception;
+    void testFrames() throws Exception;
+}
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultStreamExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultStreamExtractorTest.java
new file mode 100644
index 000000000..406177f7e
--- /dev/null
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultStreamExtractorTest.java
@@ -0,0 +1,286 @@
+package org.schabi.newpipe.extractor.services;
+
+import org.junit.Test;
+import org.schabi.newpipe.extractor.MediaFormat;
+import org.schabi.newpipe.extractor.localization.DateWrapper;
+import org.schabi.newpipe.extractor.stream.AudioStream;
+import org.schabi.newpipe.extractor.stream.Description;
+import org.schabi.newpipe.extractor.stream.Frameset;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
+import org.schabi.newpipe.extractor.stream.StreamType;
+import org.schabi.newpipe.extractor.stream.SubtitlesStream;
+import org.schabi.newpipe.extractor.stream.VideoStream;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.List;
+import java.util.TimeZone;
+
+import javax.annotation.Nullable;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+import static org.schabi.newpipe.extractor.ExtractorAsserts.assertAtLeast;
+import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
+import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsValidUrl;
+import static org.schabi.newpipe.extractor.services.DefaultTests.defaultTestListOfItems;
+
+/**
+ * Test for {@link StreamExtractor}
+ */
+public abstract class DefaultStreamExtractorTest extends DefaultExtractorTest<StreamExtractor>
+        implements BaseStreamExtractorTest {
+
+    public abstract StreamType expectedStreamType();
+    public abstract String expectedUploaderName();
+    public abstract String expectedUploaderUrl();
+    public abstract List<String> expectedDescriptionContains(); // e.g. for full links
+    public abstract long expectedLength();
+    public long expectedTimestamp() { return 0; }; // default: there is no timestamp
+    public abstract long expectedViewCountAtLeast();
+    @Nullable public abstract String expectedUploadDate(); // format: "yyyy-MM-dd HH:mm:ss.SSS"
+    @Nullable public abstract String expectedTextualUploadDate();
+    public abstract long expectedLikeCountAtLeast(); // return -1 if ratings are disabled
+    public abstract long expectedDislikeCountAtLeast(); // return -1 if ratings are disabled
+    public boolean expectedHasRelatedStreams() { return true; } // default: there are related videos
+    public int expectedAgeLimit() { return StreamExtractor.NO_AGE_LIMIT; } // default: no limit
+    @Nullable public String expectedErrorMessage() { return null; } // default: no error message
+    public boolean expectedHasVideoStreams() { return true; } // default: there are video streams
+    public boolean expectedHasAudioStreams() { return true; } // default: there are audio streams
+    public boolean expectedHasSubtitles() { return true; } // default: there are subtitles streams
+    public boolean expectedHasFrames() { return true; } // default: there are frames
+
+    @Test
+    @Override
+    public void testStreamType() throws Exception {
+        assertEquals(expectedStreamType(), extractor().getStreamType());
+    }
+
+    @Test
+    @Override
+    public void testUploaderName() throws Exception {
+        assertEquals(expectedUploaderName(), extractor().getUploaderName());
+    }
+
+    @Test
+    @Override
+    public void testUploaderUrl() throws Exception {
+        final String uploaderUrl = extractor().getUploaderUrl();
+        assertIsSecureUrl(uploaderUrl);
+        assertEquals(expectedUploaderUrl(), uploaderUrl);
+    }
+
+    @Test
+    @Override
+    public void testUploaderAvatarUrl() throws Exception {
+        assertIsSecureUrl(extractor().getUploaderAvatarUrl());
+    }
+
+    @Test
+    @Override
+    public void testThumbnailUrl() throws Exception {
+        assertIsSecureUrl(extractor().getThumbnailUrl());
+    }
+
+    @Test
+    @Override
+    public void testDescription() throws Exception {
+        final Description description = extractor().getDescription();
+        assertNotNull(description);
+        assertFalse("description is empty", description.getContent().isEmpty());
+
+        for (String s : expectedDescriptionContains()) {
+            assertThat(description.getContent(), containsString(s));
+        }
+    }
+
+    @Test
+    @Override
+    public void testLength() throws Exception {
+        assertEquals(expectedLength(), extractor().getLength());
+    }
+
+    @Test
+    @Override
+    public void testTimestamp() throws Exception {
+        assertEquals(expectedTimestamp(), extractor().getTimeStamp());
+    }
+
+    @Test
+    @Override
+    public void testViewCount() throws Exception {
+        assertAtLeast(expectedViewCountAtLeast(), extractor().getViewCount());
+    }
+
+    @Test
+    @Override
+    public void testUploadDate() throws Exception {
+        final DateWrapper dateWrapper = extractor().getUploadDate();
+
+        if (expectedUploadDate() == null) {
+            assertNull(dateWrapper);
+        } else {
+            assertNotNull(dateWrapper);
+
+            final Calendar expectedDate = Calendar.getInstance();
+            final Calendar actualDate = dateWrapper.date();
+            expectedDate.setTimeZone(TimeZone.getTimeZone("GMT"));
+            actualDate.setTimeZone(TimeZone.getTimeZone("GMT"));
+
+            final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");
+            expectedDate.setTime(sdf.parse(expectedUploadDate()));
+            assertEquals(expectedDate, actualDate);
+        }
+    }
+
+    @Test
+    @Override
+    public void testTextualUploadDate() throws Exception {
+        assertEquals(expectedTextualUploadDate(), extractor().getTextualUploadDate());
+    }
+
+    @Test
+    @Override
+    public void testLikeCount() throws Exception {
+        if (expectedLikeCountAtLeast() == -1) {
+            assertEquals(-1, extractor().getLikeCount());
+        } else {
+            assertAtLeast(expectedLikeCountAtLeast(), extractor().getLikeCount());
+        }
+    }
+
+    @Test
+    @Override
+    public void testDislikeCount() throws Exception {
+        if (expectedDislikeCountAtLeast() == -1) {
+            assertEquals(-1, extractor().getDislikeCount());
+        } else {
+            assertAtLeast(expectedDislikeCountAtLeast(), extractor().getDislikeCount());
+        }
+    }
+
+    @Test
+    @Override
+    public void testRelatedStreams() throws Exception {
+        final StreamInfoItemsCollector relatedStreams = extractor().getRelatedStreams();
+
+        if (expectedHasRelatedStreams()) {
+            defaultTestListOfItems(extractor().getService(), relatedStreams.getItems(),
+                    relatedStreams.getErrors());
+        } else {
+            assertNull(relatedStreams);
+        }
+    }
+
+    @Test
+    @Override
+    public void testAgeLimit() throws Exception {
+        assertEquals(expectedAgeLimit(), extractor().getAgeLimit());
+    }
+
+    @Test
+    @Override
+    public void testErrorMessage() throws Exception {
+        assertEquals(expectedErrorMessage(), extractor().getErrorMessage());
+    }
+
+    @Test
+    @Override
+    public void testVideoStreams() throws Exception {
+        List<VideoStream> videoStreams = extractor().getVideoStreams();
+        final List<VideoStream> videoOnlyStreams = extractor().getVideoOnlyStreams();
+        assertNotNull(videoStreams);
+        assertNotNull(videoOnlyStreams);
+        videoStreams.addAll(videoOnlyStreams);
+
+        if (expectedHasVideoStreams()) {
+            assertFalse(videoStreams.isEmpty());
+
+            for (VideoStream stream : videoStreams) {
+                assertIsSecureUrl(stream.getUrl());
+                assertFalse(stream.getResolution().isEmpty());
+
+                int formatId = stream.getFormatId();
+                assertTrue("format id does not fit a video stream: " + formatId,
+                        0 <= formatId && formatId < 0x100);
+            }
+        } else {
+            assertTrue(videoStreams.isEmpty());
+        }
+    }
+
+    @Test
+    @Override
+    public void testAudioStreams() throws Exception {
+        final List<AudioStream> audioStreams = extractor().getAudioStreams();
+        assertNotNull(audioStreams);
+
+        if (expectedHasAudioStreams()) {
+            assertFalse(audioStreams.isEmpty());
+
+            for (AudioStream stream : audioStreams) {
+                assertIsSecureUrl(stream.getUrl());
+
+                int formatId = stream.getFormatId();
+                assertTrue("format id does not fit an audio stream: " + formatId,
+                        0x100 <= formatId && formatId < 0x1000);
+            }
+        } else {
+            assertTrue(audioStreams.isEmpty());
+        }
+    }
+
+    @Test
+    @Override
+    public void testSubtitles() throws Exception {
+        List<SubtitlesStream> subtitles = extractor().getSubtitlesDefault();
+        assertNotNull(subtitles);
+
+        if (expectedHasSubtitles()) {
+            assertFalse(subtitles.isEmpty());
+
+            for (SubtitlesStream stream : subtitles) {
+                assertIsSecureUrl(stream.getUrl());
+
+                int formatId = stream.getFormatId();
+                assertTrue("format id does not fit an audio stream: " + formatId,
+                        0x1000 <= formatId && formatId < 0x10000);
+            }
+        } else {
+            assertTrue(subtitles.isEmpty());
+
+            MediaFormat[] formats = {MediaFormat.VTT, MediaFormat.TTML, MediaFormat.TRANSCRIPT1,
+                    MediaFormat.TRANSCRIPT2, MediaFormat.TRANSCRIPT3, MediaFormat.SRT};
+            for (MediaFormat format : formats) {
+                subtitles = extractor().getSubtitles(format);
+                assertNotNull(subtitles);
+                assertTrue(subtitles.isEmpty());
+            }
+        }
+    }
+
+    @Test
+    @Override
+    public void testFrames() throws Exception {
+        final List<Frameset> frames = extractor().getFrames();
+        assertNotNull(frames);
+
+        if (expectedHasFrames()) {
+            assertFalse(frames.isEmpty());
+            for (final Frameset f : frames) {
+                for (final String url : f.getUrls()) {
+                    assertIsValidUrl(url);
+                    assertIsSecureUrl(url);
+                }
+            }
+        } else {
+            assertTrue(frames.isEmpty());
+        }
+    }
+}
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultTests.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultTests.java
index a335b0eca..d2b9ca4ae 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultTests.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/DefaultTests.java
@@ -10,7 +10,6 @@ import org.schabi.newpipe.extractor.localization.DateWrapper;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
-import java.util.Calendar;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
@@ -42,7 +41,7 @@ public final class DefaultTests {
                 StreamInfoItem streamInfoItem = (StreamInfoItem) item;
                 assertNotEmpty("Uploader name not set: " + item, streamInfoItem.getUploaderName());
 
-//                assertNotEmpty("Uploader url not set: " + item, streamInfoItem.getUploaderUrl());
+                // assertNotEmpty("Uploader url not set: " + item, streamInfoItem.getUploaderUrl());
                 final String uploaderUrl = streamInfoItem.getUploaderUrl();
                 if (!isNullOrEmpty(uploaderUrl)) {
                     assertIsSecureUrl(uploaderUrl);
@@ -54,7 +53,6 @@ public final class DefaultTests {
                 if (!isNullOrEmpty(streamInfoItem.getTextualUploadDate())) {
                     final DateWrapper uploadDate = streamInfoItem.getUploadDate();
                     assertNotNull("No parsed upload date", uploadDate);
-                    assertTrue("Upload date not in the past", uploadDate.date().before(Calendar.getInstance()));
                 }
 
             } else if (item instanceof ChannelInfoItem) {
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/media_ccc/MediaCCCStreamExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/media_ccc/MediaCCCStreamExtractorTest.java
index 95c882290..6a4c4c0e2 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/media_ccc/MediaCCCStreamExtractorTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/media_ccc/MediaCCCStreamExtractorTest.java
@@ -1,204 +1,148 @@
 package org.schabi.newpipe.extractor.services.media_ccc;
 
-import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
 import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
 import org.schabi.newpipe.extractor.services.media_ccc.extractors.MediaCCCStreamExtractor;
-import org.schabi.newpipe.extractor.stream.AudioStream;
-import org.schabi.newpipe.extractor.stream.VideoStream;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.stream.StreamType;
 
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
+import java.util.Arrays;
 import java.util.List;
 
-import static java.util.Objects.requireNonNull;
+import javax.annotation.Nullable;
+
 import static junit.framework.TestCase.assertEquals;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
 import static org.schabi.newpipe.extractor.ServiceList.MediaCCC;
 
 /**
  * Test {@link MediaCCCStreamExtractor}
  */
 public class MediaCCCStreamExtractorTest {
-    public static class Gpn18Tmux {
-        private static MediaCCCStreamExtractor extractor;
+    private static final String BASE_URL = "https://media.ccc.de/v/";
+
+    public static class Gpn18Tmux extends DefaultStreamExtractorTest {
+        private static final String ID = "gpn18-105-tmux-warum-ein-schwarzes-fenster-am-bildschirm-reicht";
+        private static final String URL = BASE_URL + ID;
+        private static StreamExtractor extractor;
 
         @BeforeClass
-        public static void setUpClass() throws Exception {
+        public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-
-            extractor = (MediaCCCStreamExtractor) MediaCCC.getStreamExtractor("https://media.ccc.de/v/gpn18-105-tmux-warum-ein-schwarzes-fenster-am-bildschirm-reicht");
+            extractor = MediaCCC.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
-        @Test
-        public void testServiceId() throws Exception {
-            assertEquals(2, extractor.getServiceId());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return MediaCCC; }
+        @Override public String expectedName() { return "tmux - Warum ein schwarzes Fenster am Bildschirm reicht"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return URL; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testName() throws Exception {
-            assertEquals("tmux - Warum ein schwarzes Fenster am Bildschirm reicht", extractor.getName());
-        }
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "gpn18"; }
+        @Override public String expectedUploaderUrl() { return "https://media.ccc.de/c/gpn18"; }
+        @Override public List<String> expectedDescriptionContains() { return Arrays.asList("SSH-Sessions", "\"Terminal Multiplexer\""); }
+        @Override public long expectedLength() { return 3097; }
+        @Override public long expectedViewCountAtLeast() { return 2380; }
+        @Nullable @Override public String expectedUploadDate() { return "2018-05-11 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2018-05-11T02:00:00.000+02:00"; }
+        @Override public long expectedLikeCountAtLeast() { return -1; }
+        @Override public long expectedDislikeCountAtLeast() { return -1; }
+        @Override public boolean expectedHasSubtitles() { return false; }
+        @Override public boolean expectedHasFrames() { return false; }
 
+        @Override
         @Test
-        public void testId() throws Exception {
-            assertEquals("gpn18-105-tmux-warum-ein-schwarzes-fenster-am-bildschirm-reicht", extractor.getId());
-        }
-
-        @Test
-        public void testUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUrl());
-            assertEquals("https://media.ccc.de/public/events/gpn18-105-tmux-warum-ein-schwarzes-fenster-am-bildschirm-reicht", extractor.getUrl());
-        }
-
-        @Test
-        public void testOriginalUrl() throws Exception {
-            assertIsSecureUrl(extractor.getOriginalUrl());
-            assertEquals("https://media.ccc.de/v/gpn18-105-tmux-warum-ein-schwarzes-fenster-am-bildschirm-reicht", extractor.getOriginalUrl());
-        }
-
-        @Test
-        public void testThumbnail() throws Exception {
-            assertIsSecureUrl(extractor.getThumbnailUrl());
+        public void testThumbnailUrl() throws Exception {
+            super.testThumbnailUrl();
             assertEquals("https://static.media.ccc.de/media/events/gpn/gpn18/105-hd.jpg", extractor.getThumbnailUrl());
         }
 
-        @Test
-        public void testUploaderName() throws Exception {
-            assertEquals("gpn18", extractor.getUploaderName());
-        }
-
-        @Test
-        public void testUploaderUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUploaderUrl());
-            assertEquals("https://media.ccc.de/public/conferences/gpn18", extractor.getUploaderUrl());
-        }
-
+        @Override
         @Test
         public void testUploaderAvatarUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUploaderAvatarUrl());
+            super.testUploaderAvatarUrl();
             assertEquals("https://static.media.ccc.de/media/events/gpn/gpn18/logo.png", extractor.getUploaderAvatarUrl());
         }
 
+        @Override
         @Test
         public void testVideoStreams() throws Exception {
-            List<VideoStream> videoStreamList = extractor.getVideoStreams();
-            assertEquals(4, videoStreamList.size());
-            for (VideoStream stream : videoStreamList) {
-                assertIsSecureUrl(stream.getUrl());
-            }
+            super.testVideoStreams();
+            assertEquals(4, extractor.getVideoStreams().size());
         }
 
+        @Override
         @Test
         public void testAudioStreams() throws Exception {
-            List<AudioStream> audioStreamList = extractor.getAudioStreams();
-            assertEquals(2, audioStreamList.size());
-            for (AudioStream stream : audioStreamList) {
-                assertIsSecureUrl(stream.getUrl());
-            }
-        }
-
-        @Test
-        public void testGetTextualUploadDate() throws ParsingException {
-            Assert.assertEquals("2018-05-11T02:00:00.000+02:00", extractor.getTextualUploadDate());
-        }
-
-        @Test
-        public void testGetUploadDate() throws ParsingException, ParseException {
-            final Calendar instance = Calendar.getInstance();
-            instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2018-05-11"));
-            assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
+            super.testAudioStreams();
+            assertEquals(2, extractor.getAudioStreams().size());
         }
     }
 
-    public static class _36c3PrivacyMessaging {
-        private static MediaCCCStreamExtractor extractor;
+    public static class _36c3PrivacyMessaging extends DefaultStreamExtractorTest {
+        private static final String ID = "36c3-10565-what_s_left_for_private_messaging";
+        private static final String URL = BASE_URL + ID;
+        private static StreamExtractor extractor;
 
         @BeforeClass
-        public static void setUpClass() throws Exception {
+        public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (MediaCCCStreamExtractor) MediaCCC.getStreamExtractor("https://media.ccc.de/v/36c3-10565-what_s_left_for_private_messaging");
+            extractor = MediaCCC.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
-        @Test
-        public void testName() throws Exception {
-            assertEquals("What's left for private messaging?", extractor.getName());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return MediaCCC; }
+        @Override public String expectedName() { return "What's left for private messaging?"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return URL; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testId() throws Exception {
-            assertEquals("36c3-10565-what_s_left_for_private_messaging", extractor.getId());
-        }
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "36c3"; }
+        @Override public String expectedUploaderUrl() { return "https://media.ccc.de/c/36c3"; }
+        @Override public List<String> expectedDescriptionContains() { return Arrays.asList("WhatsApp", "Signal"); }
+        @Override public long expectedLength() { return 3603; }
+        @Override public long expectedViewCountAtLeast() { return 2380; }
+        @Nullable @Override public String expectedUploadDate() { return "2020-01-11 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2020-01-11T01:00:00.000+01:00"; }
+        @Override public long expectedLikeCountAtLeast() { return -1; }
+        @Override public long expectedDislikeCountAtLeast() { return -1; }
+        @Override public boolean expectedHasSubtitles() { return false; }
+        @Override public boolean expectedHasFrames() { return false; }
 
+        @Override
         @Test
-        public void testUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUrl());
-            assertEquals("https://media.ccc.de/public/events/36c3-10565-what_s_left_for_private_messaging", extractor.getUrl());
-        }
-
-        @Test
-        public void testOriginalUrl() throws Exception {
-            assertIsSecureUrl(extractor.getOriginalUrl());
-            assertEquals("https://media.ccc.de/v/36c3-10565-what_s_left_for_private_messaging", extractor.getOriginalUrl());
-        }
-
-        @Test
-        public void testThumbnail() throws Exception {
-            assertIsSecureUrl(extractor.getThumbnailUrl());
+        public void testThumbnailUrl() throws Exception {
+            super.testThumbnailUrl();
             assertEquals("https://static.media.ccc.de/media/congress/2019/10565-hd.jpg", extractor.getThumbnailUrl());
         }
 
-        @Test
-        public void testUploaderName() throws Exception {
-            assertEquals("36c3", extractor.getUploaderName());
-        }
-
-        @Test
-        public void testUploaderUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUploaderUrl());
-            assertEquals("https://media.ccc.de/public/conferences/36c3", extractor.getUploaderUrl());
-        }
-
+        @Override
         @Test
         public void testUploaderAvatarUrl() throws Exception {
-            assertIsSecureUrl(extractor.getUploaderAvatarUrl());
+            super.testUploaderAvatarUrl();
             assertEquals("https://static.media.ccc.de/media/congress/2019/logo.png", extractor.getUploaderAvatarUrl());
         }
 
+        @Override
         @Test
         public void testVideoStreams() throws Exception {
-            List<VideoStream> videoStreamList = extractor.getVideoStreams();
-            assertEquals(8, videoStreamList.size());
-            for (VideoStream stream : videoStreamList) {
-                assertIsSecureUrl(stream.getUrl());
-            }
+            super.testVideoStreams();
+            assertEquals(8, extractor.getVideoStreams().size());
         }
 
+        @Override
         @Test
         public void testAudioStreams() throws Exception {
-            List<AudioStream> audioStreamList = extractor.getAudioStreams();
-            assertEquals(2, audioStreamList.size());
-            for (AudioStream stream : audioStreamList) {
-                assertIsSecureUrl(stream.getUrl());
-            }
-        }
-
-        @Test
-        public void testGetTextualUploadDate() throws ParsingException {
-            Assert.assertEquals("2020-01-11T01:00:00.000+01:00", extractor.getTextualUploadDate());
-        }
-
-        @Test
-        public void testGetUploadDate() throws ParsingException, ParseException {
-            final Calendar instance = Calendar.getInstance();
-            instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2020-01-11"));
-            assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
+            super.testAudioStreams();
+            assertEquals(2, extractor.getAudioStreams().size());
         }
     }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorDefaultTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorDefaultTest.java
deleted file mode 100644
index c3d8c7169..000000000
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorDefaultTest.java
+++ /dev/null
@@ -1,180 +0,0 @@
-package org.schabi.newpipe.extractor.services.peertube;
-
-import org.junit.BeforeClass;
-import org.junit.Ignore;
-import org.junit.Test;
-import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.peertube.extractors.PeertubeStreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
-import org.schabi.newpipe.extractor.stream.StreamType;
-
-import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
-import java.util.Locale;
-import java.util.TimeZone;
-
-import static java.util.Objects.requireNonNull;
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
-import static org.schabi.newpipe.extractor.ServiceList.PeerTube;
-
-/**
- * Test for {@link StreamExtractor}
- */
-public class PeertubeStreamExtractorDefaultTest {
-    private static PeertubeStreamExtractor extractor;
-    private static final String expectedLargeDescription = "**[Want to help to translate this video?](https://weblate.framasoft.org/projects/what-is-peertube-video/)**\r\n\r\n**Take back the control of your videos! [#JoinPeertube](https://joinpeertube.org)**\r\n*A decentralized video hosting network, based on free/libre software!*\r\n\r\n**Animation Produced by:** [LILA](https://libreart.info) - [ZeMarmot Team](https://film.zemarmot.net)\r\n*Directed by* Aryeom\r\n*Assistant* Jehan\r\n**Licence**: [CC-By-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)\r\n\r\n**Sponsored by** [Framasoft](https://framasoft.org)\r\n\r\n**Music**: [Red Step Forward](http://play.dogmazic.net/song.php?song_id=52491) - CC-By Ken Bushima\r\n\r\n**Movie Clip**: [Caminades 3: Llamigos](http://www.caminandes.com/) CC-By Blender Institute\r\n\r\n**Video sources**: https://gitlab.gnome.org/Jehan/what-is-peertube/";
-    private static final String expectedSmallDescription = "https://www.kickstarter.com/projects/1587081065/nothing-to-hide-the-documentary";
-
-    @BeforeClass
-    public static void setUp() throws Exception {
-        NewPipe.init(DownloaderTestImpl.getInstance());
-        // setting instance might break test when running in parallel
-        PeerTube.setInstance(new PeertubeInstance("https://framatube.org", "FramaTube"));
-        extractor = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://framatube.org/videos/watch/9c9de5e8-0a1e-484a-b099-e80766180a6d");
-        extractor.fetchPage();
-    }
-
-    @Test
-    public void testGetUploadDate() throws ParsingException, ParseException {
-        final Calendar instance = Calendar.getInstance();
-        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.S'Z'");
-        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
-        instance.setTime(sdf.parse("2018-10-01T10:52:46.396Z"));
-        assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
-
-    }
-
-    @Test
-    public void testGetInvalidTimeStamp() throws ParsingException {
-        assertTrue(extractor.getTimeStamp() + "",
-                extractor.getTimeStamp() <= 0);
-    }
-
-    @Test
-    public void testGetTitle() throws ParsingException {
-        assertEquals("What is PeerTube?", extractor.getName());
-    }
-
-    @Test
-    public void testGetLargeDescription() throws ParsingException {
-        assertEquals(expectedLargeDescription, extractor.getDescription().getContent());
-    }
-
-    @Test
-    public void testGetEmptyDescription() throws Exception {
-        PeertubeStreamExtractor extractorEmpty = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://framatube.org/api/v1/videos/d5907aad-2252-4207-89ec-a4b687b9337d");
-        extractorEmpty.fetchPage();
-        assertEquals("", extractorEmpty.getDescription().getContent());
-    }
-
-    @Test
-    public void testGetSmallDescription() throws Exception {
-        PeerTube.setInstance(new PeertubeInstance("https://peertube.cpy.re", "PeerTube test server"));
-        PeertubeStreamExtractor extractorSmall = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://peertube.cpy.re/videos/watch/d2a5ec78-5f85-4090-8ec5-dc1102e022ea");
-        extractorSmall.fetchPage();
-        assertEquals(expectedSmallDescription, extractorSmall.getDescription().getContent());
-    }
-
-    @Test
-    public void testGetUploaderName() throws ParsingException {
-        assertEquals("Framasoft", extractor.getUploaderName());
-    }
-
-    @Test
-    public void testGetUploaderUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderUrl());
-        assertEquals("https://framatube.org/api/v1/accounts/framasoft@framatube.org", extractor.getUploaderUrl());
-    }
-
-    @Test
-    public void testGetUploaderAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-    }
-
-    @Test
-    public void testGetSubChannelName() throws ParsingException {
-        assertEquals("Les vidéos de Framasoft", extractor.getSubChannelName());
-    }
-
-    @Test
-    public void testGetSubChannelUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getSubChannelUrl());
-        assertEquals("https://framatube.org/video-channels/bf54d359-cfad-4935-9d45-9d6be93f63e8", extractor.getSubChannelUrl());
-    }
-
-    @Test
-    public void testGetSubChannelAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getSubChannelAvatarUrl());
-    }
-
-    @Test
-    public void testGetLength() throws ParsingException {
-        assertEquals(113, extractor.getLength());
-    }
-
-    @Test
-    public void testGetViewCount() throws ParsingException {
-        assertTrue(Long.toString(extractor.getViewCount()),
-                extractor.getViewCount() > 10);
-    }
-
-    @Test
-    public void testGetThumbnailUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getThumbnailUrl());
-    }
-
-    @Test
-    public void testGetVideoStreams() throws IOException, ExtractionException {
-        assertFalse(extractor.getVideoStreams().isEmpty());
-    }
-
-    @Test
-    public void testStreamType() throws ParsingException {
-        assertTrue(extractor.getStreamType() == StreamType.VIDEO_STREAM);
-    }
-
-    @Ignore
-    @Test
-    public void testGetRelatedVideos() throws ExtractionException, IOException {
-        StreamInfoItemsCollector relatedVideos = extractor.getRelatedStreams();
-        assertFalse(relatedVideos.getItems().isEmpty());
-        assertTrue(relatedVideos.getErrors().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesListDefault() throws IOException, ExtractionException {
-        assertFalse(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesList() throws IOException, ExtractionException {
-        assertFalse(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetAgeLimit() throws ExtractionException, IOException {
-        assertEquals(0, extractor.getAgeLimit());
-        PeertubeStreamExtractor ageLimit = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://nocensoring.net/videos/embed/dbd8e5e1-c527-49b6-b70c-89101dbb9c08");
-        ageLimit.fetchPage();
-        assertEquals(18, ageLimit.getAgeLimit());
-    }
-
-    @Test
-    public void testGetSupportInformation() throws ExtractionException, IOException {
-        PeertubeStreamExtractor supportInfoExtractor = (PeertubeStreamExtractor) PeerTube.getStreamExtractor("https://framatube.org/videos/watch/ee408ec8-07cd-4e35-b884-fb681a4b9d37");
-        supportInfoExtractor.fetchPage();
-        assertEquals("https://utip.io/chatsceptique", supportInfoExtractor.getSupportInfo());
-    }
-
-    @Test
-    public void testGetLanguageInformation() throws ParsingException {
-        assertEquals(new Locale("en"), extractor.getLanguageInfo());
-    }
-}
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorTest.java
new file mode 100644
index 000000000..bddb75bd4
--- /dev/null
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeStreamExtractorTest.java
@@ -0,0 +1,165 @@
+package org.schabi.newpipe.extractor.services.peertube;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.schabi.newpipe.DownloaderTestImpl;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.stream.StreamType;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Locale;
+
+import javax.annotation.Nullable;
+
+import static org.junit.Assert.assertEquals;
+import static org.schabi.newpipe.extractor.ServiceList.PeerTube;
+
+public class PeertubeStreamExtractorTest {
+    private static final String BASE_URL = "/videos/watch/";
+
+    public static class WhatIsPeertube extends DefaultStreamExtractorTest {
+        private static final String ID = "9c9de5e8-0a1e-484a-b099-e80766180a6d";
+        private static final String INSTANCE = "https://framatube.org";
+        private static final String URL = INSTANCE + BASE_URL + ID;
+        private static StreamExtractor extractor;
+
+        @BeforeClass
+        public static void setUp() throws Exception {
+            NewPipe.init(DownloaderTestImpl.getInstance());
+            // setting instance might break test when running in parallel (!)
+            PeerTube.setInstance(new PeertubeInstance(INSTANCE, "FramaTube"));
+            extractor = PeerTube.getStreamExtractor(URL);
+            extractor.fetchPage();
+        }
+
+        @Test
+        public void testGetLanguageInformation() throws ParsingException {
+            assertEquals(new Locale("en"), extractor.getLanguageInfo());
+        }
+
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return PeerTube; }
+        @Override public String expectedName() { return "What is PeerTube?"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return BASE_URL + ID; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
+
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "Framasoft"; }
+        @Override public String expectedUploaderUrl() { return "https://framatube.org/accounts/framasoft"; }
+        @Override public List<String> expectedDescriptionContains() { // CRLF line ending
+            return Arrays.asList("**[Want to help to translate this video?](https://weblate.framasoft.org/projects/what-is-peertube-video/)**\r\n"
+                    + "\r\n"
+                    + "**Take back the control of your videos! [#JoinPeertube](https://joinpeertube.org)**\r\n"
+                    + "*A decentralized video hosting network, based on free/libre software!*\r\n"
+                    + "\r\n"
+                    + "**Animation Produced by:** [LILA](https://libreart.info) - [ZeMarmot Team](https://film.zemarmot.net)\r\n"
+                    + "*Directed by* Aryeom\r\n"
+                    + "*Assistant* Jehan\r\n"
+                    + "**Licence**: [CC-By-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)\r\n"
+                    + "\r\n"
+                    + "**Sponsored by** [Framasoft](https://framasoft.org)\r\n"
+                    + "\r\n"
+                    + "**Music**: [Red Step Forward](http://play.dogmazic.net/song.php?song_id=52491) - CC-By Ken Bushima\r\n"
+                    + "\r\n"
+                    + "**Movie Clip**: [Caminades 3: Llamigos](http://www.caminandes.com/) CC-By Blender Institute\r\n"
+                    + "\r\n"
+                    + "**Video sources**: https://gitlab.gnome.org/Jehan/what-is-peertube/");
+        }
+        @Override public long expectedLength() { return 113; }
+        @Override public long expectedViewCountAtLeast() { return 38600; }
+        @Nullable @Override public String expectedUploadDate() { return "2018-10-01 12:52:46.396"; } // GMT (!)
+        @Nullable @Override public String expectedTextualUploadDate() { return "2018-10-01T10:52:46.396Z"; }
+        @Override public long expectedLikeCountAtLeast() { return 120; }
+        @Override public long expectedDislikeCountAtLeast() { return 0; }
+        @Override public boolean expectedHasAudioStreams() { return false; }
+        @Override public boolean expectedHasFrames() { return false; }
+
+    }
+
+    public static class AgeRestricted extends DefaultStreamExtractorTest {
+        private static final String ID = "0d501633-f2d9-4476-87c6-71f1c02402a4";
+        private static final String INSTANCE = "https://peertube.co.uk";
+        private static final String URL = INSTANCE + BASE_URL + ID;
+        private static StreamExtractor extractor;
+
+        @BeforeClass
+        public static void setUp() throws Exception {
+            NewPipe.init(DownloaderTestImpl.getInstance());;
+            // setting instance might break test when running in parallel (!)
+            PeerTube.setInstance(new PeertubeInstance(INSTANCE));
+            extractor = PeerTube.getStreamExtractor(URL);
+            extractor.fetchPage();
+        }
+
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return PeerTube; }
+        @Override public String expectedName() { return "A DPR Combatant Describes how Orders are Given through Russian Officers"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return BASE_URL + ID; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
+
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "Tomas Berezovskiy"; }
+        @Override public String expectedUploaderUrl() { return "https://peertube.iriseden.eu/accounts/tomas_berezovskiy"; }
+        @Override public List<String> expectedDescriptionContains() { // LF line ending
+            return Arrays.asList("https://en.informnapalm.org/dpr-combatant-describes-orders-given-russian-officers/ "
+                    + " The InformNapalm team received another video of a separatist prisoner of war telling about his "
+                    + "activities in `Dontesk People’s Republic’ (DPR) structures. The video is old, as the interrogation"
+                    + " date is September, but it is the situation described is still relevant and interesting today. In "
+                    + "this recording the combatant re-tells how he came to be recruited into the DPR forces, and how "
+                    + "they are operating under Russian military command. He expresses remorse for his stupidity. Perhaps"
+                    + " he is just saying what he thinks his interrogator wants to hear, perhaps he is speaking from a "
+                    + "new understanding?\n"
+                    + "\n"
+                    + "The video contains a lot of cut and paste (stitching) in places where intelligence data or valuable"
+                    + " information has been deleted because it cannot be shared publically. We trust you will understand "
+                    + "this necessity.");
+        }
+        @Override public long expectedLength() { return 512; }
+        @Override public long expectedViewCountAtLeast() { return 7; }
+        @Nullable @Override public String expectedUploadDate() { return "2019-10-22 08:16:48.982"; } // GMT (!)
+        @Nullable @Override public String expectedTextualUploadDate() { return "2019-10-22T06:16:48.982Z"; }
+        @Override public long expectedLikeCountAtLeast() { return 3; }
+        @Override public long expectedDislikeCountAtLeast() { return 0; }
+        @Override public int expectedAgeLimit() { return 18; }
+        @Override public boolean expectedHasAudioStreams() { return false; }
+        @Override public boolean expectedHasSubtitles() { return false; }
+        @Override public boolean expectedHasFrames() { return false; }
+    }
+
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        NewPipe.init(DownloaderTestImpl.getInstance());
+        PeerTube.setInstance(new PeertubeInstance("https://peertube.cpy.re", "PeerTube test server"));
+    }
+
+    @Test
+    public void testGetEmptyDescription() throws Exception {
+        StreamExtractor extractorEmpty = PeerTube.getStreamExtractor("https://framatube.org/api/v1/videos/d5907aad-2252-4207-89ec-a4b687b9337d");
+        extractorEmpty.fetchPage();
+        assertEquals("", extractorEmpty.getDescription().getContent());
+    }
+
+    @Test
+    public void testGetSmallDescription() throws Exception {
+        StreamExtractor extractorSmall = PeerTube.getStreamExtractor("https://peertube.cpy.re/videos/watch/d2a5ec78-5f85-4090-8ec5-dc1102e022ea");
+        extractorSmall.fetchPage();
+        assertEquals("https://www.kickstarter.com/projects/1587081065/nothing-to-hide-the-documentary", extractorSmall.getDescription().getContent());
+    }
+
+    @Test
+    public void testGetSupportInformation() throws ExtractionException, IOException {
+        StreamExtractor supportInfoExtractor = PeerTube.getStreamExtractor("https://framatube.org/videos/watch/ee408ec8-07cd-4e35-b884-fb681a4b9d37");
+        supportInfoExtractor.fetchPage();
+        assertEquals("https://utip.io/chatsceptique", supportInfoExtractor.getSupportInfo());
+    }
+}
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeTrendingExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeTrendingExtractorTest.java
index 60f72f9d1..924dbbc1f 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeTrendingExtractorTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/peertube/PeertubeTrendingExtractorTest.java
@@ -8,8 +8,8 @@ import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.services.BaseListExtractorTest;
 import org.schabi.newpipe.extractor.services.peertube.extractors.PeertubeTrendingExtractor;
 
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ServiceList.*;
+import static org.junit.Assert.assertEquals;
+import static org.schabi.newpipe.extractor.ServiceList.PeerTube;
 import static org.schabi.newpipe.extractor.services.DefaultTests.*;
 
 public class PeertubeTrendingExtractorTest {
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChartsExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChartsExtractorTest.java
index 8abfb4d3f..54c48431b 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChartsExtractorTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChartsExtractorTest.java
@@ -8,7 +8,7 @@ import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.services.BaseListExtractorTest;
 import org.schabi.newpipe.extractor.services.soundcloud.extractors.SoundcloudChartsExtractor;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
 import static org.schabi.newpipe.extractor.ServiceList.SoundCloud;
 import static org.schabi.newpipe.extractor.services.DefaultTests.*;
 
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorDefaultTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorDefaultTest.java
deleted file mode 100644
index 794a1a6b6..000000000
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorDefaultTest.java
+++ /dev/null
@@ -1,163 +0,0 @@
-package org.schabi.newpipe.extractor.services.soundcloud;
-
-import org.junit.Assert;
-import org.junit.BeforeClass;
-import org.junit.Test;
-import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.soundcloud.extractors.SoundcloudStreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
-import org.schabi.newpipe.extractor.stream.StreamType;
-
-import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
-import java.util.TimeZone;
-
-import static java.util.Objects.requireNonNull;
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
-import static org.schabi.newpipe.extractor.ServiceList.SoundCloud;
-
-/**
- * Test for {@link StreamExtractor}
- */
-public class SoundcloudStreamExtractorDefaultTest {
-
-    public static class LilUziVertDoWhatIWant {
-        private static SoundcloudStreamExtractor extractor;
-
-        @BeforeClass
-        public static void setUp() throws Exception {
-            NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (SoundcloudStreamExtractor) SoundCloud.getStreamExtractor("https://soundcloud.com/liluzivert/do-what-i-want-produced-by-maaly-raw-don-cannon");
-            extractor.fetchPage();
-        }
-
-        @Test
-        public void testGetInvalidTimeStamp() throws ParsingException {
-            assertTrue(extractor.getTimeStamp() + "",
-                    extractor.getTimeStamp() <= 0);
-        }
-
-        @Test
-        public void testGetValidTimeStamp() throws IOException, ExtractionException {
-            StreamExtractor extractor = SoundCloud.getStreamExtractor("https://soundcloud.com/liluzivert/do-what-i-want-produced-by-maaly-raw-don-cannon#t=69");
-            assertEquals("69", extractor.getTimeStamp() + "");
-        }
-
-        @Test
-        public void testGetTitle() throws ParsingException {
-            assertEquals("Do What I Want [Produced By Maaly Raw + Don Cannon]", extractor.getName());
-        }
-
-        @Test
-        public void testGetDescription() throws ParsingException {
-            assertEquals("The Perfect LUV Tape®️", extractor.getDescription().getContent());
-        }
-
-        @Test
-        public void testGetUploaderName() throws ParsingException {
-            assertEquals("Lil Uzi Vert", extractor.getUploaderName());
-        }
-
-        @Test
-        public void testGetLength() throws ParsingException {
-            assertEquals(175, extractor.getLength());
-        }
-
-        @Test
-        public void testGetViewCount() throws ParsingException {
-            assertTrue(Long.toString(extractor.getViewCount()),
-                    extractor.getViewCount() > 44227978);
-        }
-
-        @Test
-        public void testGetTextualUploadDate() throws ParsingException {
-            Assert.assertEquals("2016-07-31 18:18:07", extractor.getTextualUploadDate());
-        }
-
-        @Test
-        public void testGetUploadDate() throws ParsingException, ParseException {
-            final Calendar instance = Calendar.getInstance();
-            SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss +0000");
-            sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
-            instance.setTime(sdf.parse("2016/07/31 18:18:07 +0000"));
-            assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
-        }
-
-        @Test
-        public void testGetUploaderUrl() throws ParsingException {
-            assertIsSecureUrl(extractor.getUploaderUrl());
-            assertEquals("https://soundcloud.com/liluzivert", extractor.getUploaderUrl());
-        }
-
-        @Test
-        public void testGetThumbnailUrl() throws ParsingException {
-            assertIsSecureUrl(extractor.getThumbnailUrl());
-        }
-
-        @Test
-        public void testGetUploaderAvatarUrl() throws ParsingException {
-            assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-        }
-
-        @Test
-        public void testGetAudioStreams() throws IOException, ExtractionException {
-            assertFalse(extractor.getAudioStreams().isEmpty());
-        }
-
-        @Test
-        public void testStreamType() throws ParsingException {
-            assertTrue(extractor.getStreamType() == StreamType.AUDIO_STREAM);
-        }
-
-        @Test
-        public void testGetRelatedVideos() throws ExtractionException, IOException {
-            StreamInfoItemsCollector relatedVideos = extractor.getRelatedStreams();
-            assertFalse(relatedVideos.getItems().isEmpty());
-            assertTrue(relatedVideos.getErrors().isEmpty());
-        }
-
-        @Test
-        public void testGetSubtitlesListDefault() throws IOException, ExtractionException {
-            // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-            assertTrue(extractor.getSubtitlesDefault().isEmpty());
-        }
-
-        @Test
-        public void testGetSubtitlesList() throws IOException, ExtractionException {
-            // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-            assertTrue(extractor.getSubtitlesDefault().isEmpty());
-        }
-    }
-
-    public static class ContentNotSupported {
-        @BeforeClass
-        public static void setUp() {
-            NewPipe.init(DownloaderTestImpl.getInstance());
-        }
-
-        @Test(expected = ContentNotSupportedException.class)
-        public void hlsAudioStream() throws Exception {
-            final StreamExtractor extractor =
-                    SoundCloud.getStreamExtractor("https://soundcloud.com/dualipa/cool");
-            extractor.fetchPage();
-            extractor.getAudioStreams();
-        }
-
-        @Test(expected = ContentNotSupportedException.class)
-        public void bothHlsAndOpusAudioStreams() throws Exception {
-            final StreamExtractor extractor =
-                    SoundCloud.getStreamExtractor("https://soundcloud.com/lil-baby-4pf/no-sucker");
-            extractor.fetchPage();
-            extractor.getAudioStreams();
-        }
-    }
-}
-
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorTest.java
new file mode 100644
index 000000000..28c8d0b23
--- /dev/null
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudStreamExtractorTest.java
@@ -0,0 +1,81 @@
+package org.schabi.newpipe.extractor.services.soundcloud;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.schabi.newpipe.DownloaderTestImpl;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.stream.StreamType;
+
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Nullable;
+
+import static org.schabi.newpipe.extractor.ServiceList.SoundCloud;
+
+public class SoundcloudStreamExtractorTest {
+
+    public static class LilUziVertDoWhatIWant extends DefaultStreamExtractorTest {
+        private static final String ID = "do-what-i-want-produced-by-maaly-raw-don-cannon";
+        private static final String UPLOADER = "https://soundcloud.com/liluzivert";
+        private static final int TIMESTAMP = 69;
+        private static final String URL = UPLOADER + "/" + ID + "#t=" + TIMESTAMP;
+        private static StreamExtractor extractor;
+
+        @BeforeClass
+        public static void setUp() throws Exception {
+            NewPipe.init(DownloaderTestImpl.getInstance());
+            extractor = SoundCloud.getStreamExtractor(URL);
+            extractor.fetchPage();
+        }
+
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return SoundCloud; }
+        @Override public String expectedName() { return "Do What I Want [Produced By Maaly Raw + Don Cannon]"; }
+        @Override public String expectedId() { return "276206960"; }
+        @Override public String expectedUrlContains() { return UPLOADER + "/" + ID; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
+
+        @Override public StreamType expectedStreamType() { return StreamType.AUDIO_STREAM; }
+        @Override public String expectedUploaderName() { return "Lil Uzi Vert"; }
+        @Override public String expectedUploaderUrl() { return UPLOADER; }
+        @Override public List<String> expectedDescriptionContains() { return Arrays.asList("The Perfect LUV Tape®"); }
+        @Override public long expectedLength() { return 175; }
+        @Override public long expectedTimestamp() { return TIMESTAMP; }
+        @Override public long expectedViewCountAtLeast() { return 75413600; }
+        @Nullable @Override public String expectedUploadDate() { return "2016-07-31 18:18:07.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2016-07-31 18:18:07"; }
+        @Override public long expectedLikeCountAtLeast() { return -1; }
+        @Override public long expectedDislikeCountAtLeast() { return -1; }
+        @Override public boolean expectedHasVideoStreams() { return false; }
+        @Override public boolean expectedHasSubtitles() { return false; }
+        @Override public boolean expectedHasFrames() { return false; }
+    }
+
+    public static class ContentNotSupported {
+        @BeforeClass
+        public static void setUp() {
+            NewPipe.init(DownloaderTestImpl.getInstance());
+        }
+
+        @Test(expected = ContentNotSupportedException.class)
+        public void hlsAudioStream() throws Exception {
+            final StreamExtractor extractor =
+                    SoundCloud.getStreamExtractor("https://soundcloud.com/dualipa/cool");
+            extractor.fetchPage();
+            extractor.getAudioStreams();
+        }
+
+        @Test(expected = ContentNotSupportedException.class)
+        public void bothHlsAndOpusAudioStreams() throws Exception {
+            final StreamExtractor extractor =
+                    SoundCloud.getStreamExtractor("https://soundcloud.com/lil-baby-4pf/no-sucker");
+            extractor.fetchPage();
+            extractor.getAudioStreams();
+        }
+    }
+}
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
index 95c8aeb43..6844ca2e9 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorAgeRestrictedTest.java
@@ -1,144 +1,53 @@
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
 import org.junit.BeforeClass;
-import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
-import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeStreamLinkHandlerFactory;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.stream.VideoStream;
+import org.schabi.newpipe.extractor.stream.StreamType;
 
-import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Calendar;
+import java.util.Arrays;
 import java.util.List;
 
-import static java.util.Objects.requireNonNull;
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
+import javax.annotation.Nullable;
+
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 
-/**
- * Test for {@link YoutubeStreamLinkHandlerFactory}
- */
-public class YoutubeStreamExtractorAgeRestrictedTest {
-    public static final String HTTPS = "https://";
-    private static YoutubeStreamExtractor extractor;
+public class YoutubeStreamExtractorAgeRestrictedTest extends DefaultStreamExtractorTest {
+    private static final String ID = "MmBeUZqv1QA";
+    private static final int TIMESTAMP = 196;
+    private static final String URL = YoutubeStreamExtractorDefaultTest.BASE_URL + ID + "&t=" + TIMESTAMP;
+    private static StreamExtractor extractor;
 
     @BeforeClass
     public static void setUp() throws Exception {
         NewPipe.init(DownloaderTestImpl.getInstance());
-        extractor = (YoutubeStreamExtractor) YouTube
-                .getStreamExtractor("https://www.youtube.com/watch?v=MmBeUZqv1QA");
+        extractor = YouTube.getStreamExtractor(URL);
         extractor.fetchPage();
     }
 
-    @Test
-    public void testGetInvalidTimeStamp() throws ParsingException {
-        assertTrue(extractor.getTimeStamp() + "", extractor.getTimeStamp() <= 0);
-    }
+    @Override public StreamExtractor extractor() { return extractor; }
+    @Override public StreamingService expectedService() { return YouTube; }
+    @Override public String expectedName() { return "FINGERING PORNSTARS @ AVN Expo 2017 In Las Vegas!"; }
+    @Override public String expectedId() { return ID; }
+    @Override public String expectedUrlContains() { return YoutubeStreamExtractorDefaultTest.BASE_URL + ID; }
+    @Override public String expectedOriginalUrlContains() { return URL; }
 
-    @Test
-    public void testGetValidTimeStamp() throws IOException, ExtractionException {
-        StreamExtractor extractor = YouTube.getStreamExtractor("https://youtu.be/FmG385_uUys?t=174");
-        assertEquals(extractor.getTimeStamp() + "", "174");
-        extractor = YouTube.getStreamExtractor("https://youtube.com/embed/FmG385_uUys?start=174");
-        assertEquals(extractor.getTimeStamp() + "", "174");
-    }
-
-    @Test
-    public void testGetAgeLimit() throws ParsingException {
-        assertEquals(18, extractor.getAgeLimit());
-    }
-
-    @Test
-    public void testGetName() throws ParsingException {
-        assertNotNull("name is null", extractor.getName());
-        assertFalse("name is empty", extractor.getName().isEmpty());
-    }
-
-    @Test
-    public void testGetDescription() throws ParsingException {
-        assertNotNull(extractor.getDescription());
-        assertFalse(extractor.getDescription().getContent().isEmpty());
-    }
-
-    @Test
-    public void testGetUploaderName() throws ParsingException {
-        assertNotNull(extractor.getUploaderName());
-        assertFalse(extractor.getUploaderName().isEmpty());
-    }
-
-    @Test
-    public void testGetLength() throws ParsingException {
-        assertEquals(1790, extractor.getLength());
-    }
-
-    @Test
-    public void testGetViews() throws ParsingException {
-        assertTrue(extractor.getViewCount() > 0);
-    }
-
-    @Test
-    public void testGetTextualUploadDate() throws ParsingException {
-        assertEquals("2017-01-25", extractor.getTextualUploadDate());
-    }
-
-    @Test
-    public void testGetUploadDate() throws ParsingException, ParseException {
-        final Calendar instance = Calendar.getInstance();
-        instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2017-01-25"));
-        assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
-    }
-
-    @Test
-    public void testGetThumbnailUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getThumbnailUrl());
-    }
-
-    @Test
-    public void testGetUploaderAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-    }
-
-    @Test
-    public void testGetAudioStreams() throws IOException, ExtractionException {
-        // audio streams are not always necessary
-        assertFalse(extractor.getAudioStreams().isEmpty());
-    }
-
-    @Test
-    public void testGetVideoStreams() throws IOException, ExtractionException {
-        List<VideoStream> streams = new ArrayList<>();
-        streams.addAll(extractor.getVideoStreams());
-        streams.addAll(extractor.getVideoOnlyStreams());
-
-        assertTrue(Integer.toString(streams.size()), streams.size() > 0);
-        for (VideoStream s : streams) {
-            assertTrue(s.getUrl(),
-                    s.getUrl().contains(HTTPS));
-            assertTrue(s.resolution.length() > 0);
-            assertTrue(Integer.toString(s.getFormatId()),
-                    0 <= s.getFormatId() && s.getFormatId() <= 0x100);
-        }
-    }
-
-
-    @Test
-    public void testGetSubtitlesListDefault() throws IOException, ExtractionException {
-        // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-        assertTrue(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesList() throws IOException, ExtractionException {
-        // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-        assertTrue(extractor.getSubtitles(MediaFormat.TTML).isEmpty());
-    }
+    @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+    @Override public String expectedUploaderName() { return "EpicFiveTV"; }
+    @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCuPUHlLP5POZphOIrjrNxiw"; }
+    @Override public List<String> expectedDescriptionContains() { return Arrays.asList("http://instagram.com/Ruben_Sole", "AVN"); }
+    @Override public long expectedLength() { return 1790; }
+    @Override public long expectedTimestamp() { return TIMESTAMP; }
+    @Override public long expectedViewCountAtLeast() { return 28500000; }
+    @Nullable @Override public String expectedUploadDate() { return "2017-01-25 00:00:00.000"; }
+    @Nullable @Override public String expectedTextualUploadDate() { return "2017-01-25"; }
+    @Override public long expectedLikeCountAtLeast() { return 149000; }
+    @Override public long expectedDislikeCountAtLeast() { return 38000; }
+    @Override public boolean expectedHasRelatedStreams() { return false; } // no related videos (!)
+    @Override public int expectedAgeLimit() { return 18; }
+    @Nullable @Override public String expectedErrorMessage() { return "Sign in to confirm your age"; }
+    @Override public boolean expectedHasSubtitles() { return false; }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
index 915f42ae1..a090460a5 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorControversialTest.java
@@ -1,134 +1,54 @@
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
 import org.junit.BeforeClass;
-import org.junit.Ignore;
-import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
 import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeStreamLinkHandlerFactory;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.stream.VideoStream;
+import org.schabi.newpipe.extractor.stream.StreamType;
 
-import java.io.IOException;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.Calendar;
+import java.util.Arrays;
 import java.util.List;
 
-import static java.util.Objects.requireNonNull;
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
+import javax.annotation.Nullable;
+
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 
 /**
  * Test for {@link YoutubeStreamLinkHandlerFactory}
  */
-public class YoutubeStreamExtractorControversialTest {
-    private static YoutubeStreamExtractor extractor;
+public class YoutubeStreamExtractorControversialTest extends DefaultStreamExtractorTest {
+    private static final String ID = "T4XJQO3qol8";
+    private static final String URL = YoutubeStreamExtractorDefaultTest.BASE_URL + ID;
+    private static StreamExtractor extractor;
 
     @BeforeClass
     public static void setUp() throws Exception {
         NewPipe.init(DownloaderTestImpl.getInstance());
-        extractor = (YoutubeStreamExtractor) YouTube
-                .getStreamExtractor("https://www.youtube.com/watch?v=T4XJQO3qol8");
+        extractor = YouTube.getStreamExtractor(URL);
         extractor.fetchPage();
     }
 
-    @Test
-    public void testGetInvalidTimeStamp() throws ParsingException {
-        assertTrue(extractor.getTimeStamp() + "", extractor.getTimeStamp() <= 0);
-    }
+    @Override public StreamExtractor extractor() { return extractor; }
+    @Override public StreamingService expectedService() { return YouTube; }
+    @Override public String expectedName() { return "Burning Everyone's Koran"; }
+    @Override public String expectedId() { return ID; }
+    @Override public String expectedUrlContains() { return URL; }
+    @Override public String expectedOriginalUrlContains() { return URL; }
 
-    @Test
-    public void testGetValidTimeStamp() throws IOException, ExtractionException {
-        StreamExtractor extractor = YouTube.getStreamExtractor("https://youtu.be/FmG385_uUys?t=174");
-        assertEquals(extractor.getTimeStamp() + "", "174");
-    }
-
-    @Test
-    @Ignore
-    public void testGetAgeLimit() throws ParsingException {
-        assertEquals(18, extractor.getAgeLimit());
-    }
-
-    @Test
-    public void testGetName() throws ParsingException {
-        assertNotNull("name is null", extractor.getName());
-        assertFalse("name is empty", extractor.getName().isEmpty());
-    }
-
-    @Test
-    public void testGetDescription() throws ParsingException {
-        assertNotNull(extractor.getDescription());
-        assertFalse(extractor.getDescription().getContent().isEmpty());
-    }
-
-    @Test
-    public void testGetUploaderName() throws ParsingException {
-        assertNotNull(extractor.getUploaderName());
-        assertFalse(extractor.getUploaderName().isEmpty());
-    }
-
-    @Test
-    public void testGetLength() throws ParsingException {
-        assertEquals(219, extractor.getLength());
-    }
-
-    @Test
-    public void testGetViews() throws ParsingException {
-        assertTrue(extractor.getViewCount() > 0);
-    }
-
-    @Test
-    public void testGetTextualUploadDate() throws ParsingException {
-        assertEquals("2010-09-09", extractor.getTextualUploadDate());
-    }
-
-    @Test
-    public void testGetUploadDate() throws ParsingException, ParseException {
-        final Calendar instance = Calendar.getInstance();
-        instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2010-09-09"));
-        assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
-    }
-
-    @Test
-    public void testGetThumbnailUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getThumbnailUrl());
-    }
-
-    @Test
-    public void testGetUploaderAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-    }
-
-    @Test
-    public void testGetAudioStreams() throws IOException, ExtractionException {
-        // audio streams are not always necessary
-        assertFalse(extractor.getAudioStreams().isEmpty());
-    }
-
-    @Test
-    public void testGetVideoStreams() throws IOException, ExtractionException {
-        List<VideoStream> streams = new ArrayList<>();
-        streams.addAll(extractor.getVideoStreams());
-        streams.addAll(extractor.getVideoOnlyStreams());
-        assertTrue(streams.size() > 0);
-    }
-
-    @Test
-    public void testGetSubtitlesListDefault() throws IOException, ExtractionException {
-        // Video (/view?v=T4XJQO3qol8) set in the setUp() method has at least auto-generated (English) captions
-        assertFalse(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesList() throws IOException, ExtractionException {
-        // Video (/view?v=T4XJQO3qol8) set in the setUp() method has at least auto-generated (English) captions
-        assertFalse(extractor.getSubtitles(MediaFormat.TTML).isEmpty());
+    @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+    @Override public String expectedUploaderName() { return "Amazing Atheist"; }
+    @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCjNxszyFPasDdRoD9J6X-sw"; }
+    @Override public List<String> expectedDescriptionContains() {
+        return Arrays.asList("http://www.huffingtonpost.com/2010/09/09/obama-gma-interview-quran_n_710282.html",
+                "freedom");
     }
+    @Override public long expectedLength() { return 219; }
+    @Override public long expectedViewCountAtLeast() { return 285000; }
+    @Nullable @Override public String expectedUploadDate() { return "2010-09-09 00:00:00.000"; }
+    @Nullable @Override public String expectedTextualUploadDate() { return "2010-09-09"; }
+    @Override public long expectedLikeCountAtLeast() { return 13300; }
+    @Override public long expectedDislikeCountAtLeast() { return 2600; }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
index 0d36fd9a8..49369831b 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java
@@ -1,35 +1,22 @@
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
-import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.ExtractorAsserts;
-import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
-import org.schabi.newpipe.extractor.stream.Frameset;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 import org.schabi.newpipe.extractor.stream.StreamType;
-import org.schabi.newpipe.extractor.stream.VideoStream;
-import org.schabi.newpipe.extractor.utils.Utils;
 
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
+import java.util.Arrays;
 import java.util.List;
 
-import static java.util.Objects.requireNonNull;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
+import javax.annotation.Nullable;
+
 import static org.junit.Assert.fail;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 
 /*
@@ -51,11 +38,8 @@ import static org.schabi.newpipe.extractor.ServiceList.YouTube;
  * You should have received a copy of the GNU General Public License
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
-
-/**
- * Test for {@link StreamExtractor}
- */
 public class YoutubeStreamExtractorDefaultTest {
+    static final String BASE_URL = "https://www.youtube.com/watch?v=";
 
     public static class NotAvailable {
         @BeforeClass
@@ -66,266 +50,163 @@ public class YoutubeStreamExtractorDefaultTest {
         @Test(expected = ContentNotAvailableException.class)
         public void nonExistentFetch() throws Exception {
             final StreamExtractor extractor =
-                    YouTube.getStreamExtractor("https://www.youtube.com/watch?v=don-t-exist");
+                    YouTube.getStreamExtractor(BASE_URL + "don-t-exist");
             extractor.fetchPage();
         }
 
         @Test(expected = ParsingException.class)
         public void invalidId() throws Exception {
             final StreamExtractor extractor =
-                    YouTube.getStreamExtractor("https://www.youtube.com/watch?v=INVALID_ID_INVALID_ID");
+                    YouTube.getStreamExtractor(BASE_URL + "INVALID_ID_INVALID_ID");
             extractor.fetchPage();
         }
     }
 
-    /**
-     * Test for {@link StreamExtractor}
-     */
-    public static class AdeleHello {
-        private static YoutubeStreamExtractor extractor;
+    public static class AdeleHello extends DefaultStreamExtractorTest {
+        private static final String ID = "YQHsXMglC9A";
+        private static final String URL = BASE_URL + ID;
+        private static StreamExtractor extractor;
 
         @BeforeClass
         public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (YoutubeStreamExtractor) YouTube
-                    .getStreamExtractor("https://www.youtube.com/watch?v=YQHsXMglC9A");
+            extractor = YouTube.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
         @Test
-        public void testGetInvalidTimeStamp() throws ParsingException {
-            assertTrue(extractor.getTimeStamp() + "",
-                    extractor.getTimeStamp() <= 0);
-        }
-
-        @Test
-        public void testGetValidTimeStamp() throws ExtractionException {
-            StreamExtractor extractor = YouTube.getStreamExtractor("https://youtu.be/FmG385_uUys?t=174");
-            assertEquals(extractor.getTimeStamp() + "", "174");
-        }
-
-        @Test
-        public void testGetTitle() throws ParsingException {
-            assertFalse(extractor.getName().isEmpty());
-        }
-
-        @Test
-        public void testGetDescription() throws ParsingException {
-            assertNotNull(extractor.getDescription());
-            assertFalse(extractor.getDescription().getContent().isEmpty());
-        }
-
-        @Test
-        public void testGetFullLinksInDescription() throws ParsingException {
-            assertTrue(extractor.getDescription().getContent().contains("http://adele.com"));
-        }
-
-        @Test
-        public void testGetUploaderName() throws ParsingException {
-            assertNotNull(extractor.getUploaderName());
-            assertFalse(extractor.getUploaderName().isEmpty());
-        }
-
-
-        @Test
-        public void testGetLength() throws ParsingException {
-            assertEquals(367, extractor.getLength());
-        }
-
-        @Test
-        public void testGetViewCount() throws ParsingException {
-            Long count = extractor.getViewCount();
-            assertTrue(Long.toString(count), count >= /* specific to that video */ 1220025784);
-        }
-
-        @Test
-        public void testGetTextualUploadDate() throws ParsingException {
-            Assert.assertEquals("2015-10-22", extractor.getTextualUploadDate());
-        }
-
-        @Test
-        public void testGetUploadDate() throws ParsingException, ParseException {
-            final Calendar instance = Calendar.getInstance();
-            instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2015-10-22"));
-            assertEquals(instance, requireNonNull(extractor.getUploadDate()).date());
-        }
-
-        @Test
-        public void testGetUploaderUrl() throws ParsingException {
-            String url = extractor.getUploaderUrl();
+        @Override
+        public void testUploaderUrl() throws ParsingException {
+            String url = extractor().getUploaderUrl();
             if (!url.equals("https://www.youtube.com/channel/UCsRM0YB_dabtEPGPTKo-gcw") &&
                     !url.equals("https://www.youtube.com/channel/UComP_epzeKzvBX156r6pm1Q")) {
                 fail("Uploader url is neither the music channel one nor the Vevo one");
             }
         }
 
-        @Test
-        public void testGetThumbnailUrl() throws ParsingException {
-            assertIsSecureUrl(extractor.getThumbnailUrl());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return YouTube; }
+        @Override public String expectedName() { return "Adele - Hello"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return URL; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testGetUploaderAvatarUrl() throws ParsingException {
-            assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-        }
-
-        @Test
-        public void testGetAudioStreams() throws ExtractionException {
-            assertFalse(extractor.getAudioStreams().isEmpty());
-        }
-
-        @Test
-        public void testGetVideoStreams() throws ExtractionException {
-            for (VideoStream s : extractor.getVideoStreams()) {
-                assertIsSecureUrl(s.url);
-                assertTrue(s.resolution.length() > 0);
-                assertTrue(Integer.toString(s.getFormatId()),
-                        0 <= s.getFormatId() && s.getFormatId() <= 0x100);
-            }
-        }
-
-        @Test
-        public void testStreamType() throws ParsingException {
-            assertTrue(extractor.getStreamType() == StreamType.VIDEO_STREAM);
-        }
-
-        @Test
-        public void testGetDashMpd() throws ParsingException {
-            // we dont expect this particular video to have a DASH file. For this purpouse we use a different test class.
-            assertTrue(extractor.getDashMpdUrl(),
-                    extractor.getDashMpdUrl() != null && extractor.getDashMpdUrl().isEmpty());
-        }
-
-        @Test
-        public void testGetRelatedVideos() throws ExtractionException {
-            StreamInfoItemsCollector relatedVideos = extractor.getRelatedStreams();
-            Utils.printErrors(relatedVideos.getErrors());
-            assertFalse(relatedVideos.getItems().isEmpty());
-            assertTrue(relatedVideos.getErrors().isEmpty());
-        }
-
-        @Test
-        public void testGetSubtitlesListDefault() {
-            // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-            assertTrue(extractor.getSubtitlesDefault().isEmpty());
-        }
-
-        @Test
-        public void testGetSubtitlesList() {
-            // Video (/view?v=YQHsXMglC9A) set in the setUp() method has no captions => null
-            assertTrue(extractor.getSubtitles(MediaFormat.TTML).isEmpty());
-        }
-
-        @Test
-        public void testGetLikeCount() throws ParsingException {
-            long likeCount = extractor.getLikeCount();
-            assertTrue("" + likeCount, likeCount >= 15000000);
-        }
-
-        @Test
-        public void testGetDislikeCount() throws ParsingException {
-            long dislikeCount = extractor.getDislikeCount();
-            assertTrue("" + dislikeCount, dislikeCount >= 818000);
-        }
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "Adele"; }
+        @Override public String expectedUploaderUrl() { return null; } // overridden above
+        @Override public List<String> expectedDescriptionContains() { return Arrays.asList("http://adele.com", "https://www.facebook.com/Adele"); }
+        @Override public long expectedLength() { return 367; }
+        @Override public long expectedViewCountAtLeast() { return 1220025784; }
+        @Nullable @Override public String expectedUploadDate() { return "2015-10-22 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2015-10-22"; }
+        @Override public long expectedLikeCountAtLeast() { return 15289000; }
+        @Override public long expectedDislikeCountAtLeast() { return 826000; }
+        @Override public boolean expectedHasSubtitles() { return false; }
     }
 
-    public static class DescriptionTestPewdiepie {
-        private static YoutubeStreamExtractor extractor;
+    public static class DescriptionTestPewdiepie extends DefaultStreamExtractorTest {
+        private static final String ID = "fBc4Q_htqPg";
+        private static final int TIMESTAMP = 17;
+        private static final String URL = BASE_URL + ID + "&t=" + TIMESTAMP;
+        private static StreamExtractor extractor;
 
         @BeforeClass
         public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (YoutubeStreamExtractor) YouTube
-                    .getStreamExtractor("https://www.youtube.com/watch?v=fBc4Q_htqPg");
+            extractor = YouTube.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
-        @Test
-        public void testGetDescription() throws ParsingException {
-            assertNotNull(extractor.getDescription());
-            assertFalse(extractor.getDescription().getContent().isEmpty());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return YouTube; }
+        @Override public String expectedName() { return "Dr. Phil DESTROYS spoiled brat!!!! . -- Dr Phil #7"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return BASE_URL + ID; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testGetFullLinksInDescription() throws ParsingException {
-            assertTrue(extractor.getDescription().getContent().contains("https://www.reddit.com/r/PewdiepieSubmissions/"));
-            assertTrue(extractor.getDescription().getContent().contains("https://www.youtube.com/channel/UC3e8EMTOn4g6ZSKggHTnNng"));
-            assertTrue(extractor.getDescription().getContent().contains("https://usa.clutchchairz.com/product/pewdiepie-edition-throttle-series/"));
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "PewDiePie"; }
+        @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UC-lHJZR3Gqxm24_Vd_AJ5Yw"; }
+        @Override public List<String> expectedDescriptionContains() {
+            return Arrays.asList("https://www.reddit.com/r/PewdiepieSubmissions/",
+                    "https://www.youtube.com/channel/UC3e8EMTOn4g6ZSKggHTnNng",
+                    "https://usa.clutchchairz.com/product/pewdiepie-edition-throttle-series/");
         }
+        @Override public long expectedLength() { return 1165; }
+        @Override public long expectedTimestamp() { return TIMESTAMP; }
+        @Override public long expectedViewCountAtLeast() { return 26682500; }
+        @Nullable @Override public String expectedUploadDate() { return "2018-09-12 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2018-09-12"; }
+        @Override public long expectedLikeCountAtLeast() { return 1166000; }
+        @Override public long expectedDislikeCountAtLeast() { return 16900; }
     }
 
-    public static class DescriptionTestUnboxing {
-        private static YoutubeStreamExtractor extractor;
+    public static class DescriptionTestUnboxing extends DefaultStreamExtractorTest {
+        private static final String ID = "cV5TjZCJkuA";
+        private static final String URL = BASE_URL + ID;
+        private static StreamExtractor extractor;
 
         @BeforeClass
         public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (YoutubeStreamExtractor) YouTube
-                    .getStreamExtractor("https://www.youtube.com/watch?v=cV5TjZCJkuA");
+            extractor = YouTube.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
-        @Test
-        public void testGetDescription() throws ParsingException {
-            assertNotNull(extractor.getDescription());
-            assertFalse(extractor.getDescription().getContent().isEmpty());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return YouTube; }
+        @Override public String expectedName() { return "This Smartphone Changes Everything..."; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return URL; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testGetFullLinksInDescription() throws ParsingException {
-            final String description = extractor.getDescription().getContent();
-            assertTrue(description.contains("https://www.youtube.com/watch?v=X7FLCHVXpsA&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34"));
-            assertTrue(description.contains("https://www.youtube.com/watch?v=Lqv6G0pDNnw&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34"));
-            assertTrue(description.contains("https://www.youtube.com/watch?v=XxaRBPyrnBU&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34"));
-            assertTrue(description.contains("https://www.youtube.com/watch?v=U-9tUEOFKNU&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34"));
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "Unbox Therapy"; }
+        @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCsTcErHg8oDvUnTzoqsYeNw"; }
+        @Override public List<String> expectedDescriptionContains() {
+            return Arrays.asList("https://www.youtube.com/watch?v=X7FLCHVXpsA&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34",
+                    "https://www.youtube.com/watch?v=Lqv6G0pDNnw&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34",
+                    "https://www.youtube.com/watch?v=XxaRBPyrnBU&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34",
+                    "https://www.youtube.com/watch?v=U-9tUEOFKNU&amp;list=PL7u4lWXQ3wfI_7PgX0C-VTiwLeu0S4v34");
         }
+        @Override public long expectedLength() { return 434; }
+        @Override public long expectedViewCountAtLeast() { return 21229200; }
+        @Nullable @Override public String expectedUploadDate() { return "2018-06-19 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2018-06-19"; }
+        @Override public long expectedLikeCountAtLeast() { return 340100; }
+        @Override public long expectedDislikeCountAtLeast() { return 18700; }
     }
 
-    public static class RatingsDisabledTest {
-        private static YoutubeStreamExtractor extractor;
+    public static class RatingsDisabledTest extends DefaultStreamExtractorTest {
+        private static final String ID = "HRKu0cvrr_o";
+        private static final int TIMESTAMP = 17;
+        private static final String URL = BASE_URL + ID + "&t=" + TIMESTAMP;
+        private static StreamExtractor extractor;
 
         @BeforeClass
         public static void setUp() throws Exception {
             NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (YoutubeStreamExtractor) YouTube
-                    .getStreamExtractor("https://www.youtube.com/watch?v=HRKu0cvrr_o");
+            extractor = YouTube.getStreamExtractor(URL);
             extractor.fetchPage();
         }
 
-        @Test
-        public void testGetLikeCount() throws ParsingException {
-            assertEquals(-1, extractor.getLikeCount());
-        }
+        @Override public StreamExtractor extractor() { return extractor; }
+        @Override public StreamingService expectedService() { return YouTube; }
+        @Override public String expectedName() { return "AlphaOmegaSin Fanboy Logic: Likes/Dislikes Disabled = Point Invalid Lol wtf?"; }
+        @Override public String expectedId() { return ID; }
+        @Override public String expectedUrlContains() { return BASE_URL + ID; }
+        @Override public String expectedOriginalUrlContains() { return URL; }
 
-        @Test
-        public void testGetDislikeCount() throws ParsingException {
-            assertEquals(-1, extractor.getDislikeCount());
-        }
-
-    }
-
-    public static class FramesTest {
-        private static YoutubeStreamExtractor extractor;
-
-        @BeforeClass
-        public static void setUp() throws Exception {
-            NewPipe.init(DownloaderTestImpl.getInstance());
-            extractor = (YoutubeStreamExtractor) YouTube
-                    .getStreamExtractor("https://www.youtube.com/watch?v=HoK9shIJ2xQ");
-            extractor.fetchPage();
-        }
-
-        @Test
-        public void testGetFrames() throws ExtractionException {
-            final List<Frameset> frames = extractor.getFrames();
-            assertNotNull(frames);
-            assertFalse(frames.isEmpty());
-            for (final Frameset f : frames) {
-                for (final String url : f.getUrls()) {
-                    ExtractorAsserts.assertIsValidUrl(url);
-                    ExtractorAsserts.assertIsSecureUrl(url);
-                }
-            }
-        }
+        @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+        @Override public String expectedUploaderName() { return "YouTuber PrinceOfFALLEN"; }
+        @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCQT2yul0lr6Ie9qNQNmw-sg"; }
+        @Override public List<String> expectedDescriptionContains() { return Arrays.asList("dislikes", "Alpha", "wrong"); }
+        @Override public long expectedLength() { return 84; }
+        @Override public long expectedTimestamp() { return TIMESTAMP; }
+        @Override public long expectedViewCountAtLeast() { return 190; }
+        @Nullable @Override public String expectedUploadDate() { return "2019-01-02 00:00:00.000"; }
+        @Nullable @Override public String expectedTextualUploadDate() { return "2019-01-02"; }
+        @Override public long expectedLikeCountAtLeast() { return -1; }
+        @Override public long expectedDislikeCountAtLeast() { return -1; }
     }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
index 0e17fe8d8..6a675487a 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorLivestreamTest.java
@@ -1,139 +1,54 @@
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
 import org.junit.BeforeClass;
-import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
-import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.stream.StreamType;
-import org.schabi.newpipe.extractor.stream.VideoStream;
-import org.schabi.newpipe.extractor.utils.Utils;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertSame;
-import static org.junit.Assert.assertTrue;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Nullable;
+
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 
-public class YoutubeStreamExtractorLivestreamTest {
-    private static YoutubeStreamExtractor extractor;
+public class YoutubeStreamExtractorLivestreamTest extends DefaultStreamExtractorTest {
+    private static final String ID = "5qap5aO4i9A";
+    private static final int TIMESTAMP = 1737;
+    private static final String URL = YoutubeStreamExtractorDefaultTest.BASE_URL + ID + "&t=" + TIMESTAMP;
+    private static StreamExtractor extractor;
 
     @BeforeClass
     public static void setUp() throws Exception {
         NewPipe.init(DownloaderTestImpl.getInstance());
-        extractor = (YoutubeStreamExtractor) YouTube
-                .getStreamExtractor("https://www.youtube.com/watch?v=5qap5aO4i9A");
+        extractor = YouTube.getStreamExtractor(URL);
         extractor.fetchPage();
     }
 
-    @Test
-    public void testGetInvalidTimeStamp() throws ParsingException {
-        assertTrue(extractor.getTimeStamp() + "",
-                extractor.getTimeStamp() <= 0);
-    }
+    @Override public StreamExtractor extractor() { return extractor; }
+    @Override public StreamingService expectedService() { return YouTube; }
+    @Override public String expectedName() { return "lofi hip hop radio - beats to relax/study to"; }
+    @Override public String expectedId() { return ID; }
+    @Override public String expectedUrlContains() { return YoutubeStreamExtractorDefaultTest.BASE_URL + ID; }
+    @Override public String expectedOriginalUrlContains() { return URL; }
 
-    @Test
-    public void testGetTitle() throws ParsingException {
-        assertFalse(extractor.getName().isEmpty());
-    }
-
-    @Test
-    public void testGetDescription() throws ParsingException {
-        assertNotNull(extractor.getDescription());
-        assertFalse(extractor.getDescription().getContent().isEmpty());
-    }
-
-    @Test
-    public void testGetFullLinksInDescription() throws ParsingException {
-        assertTrue(extractor.getDescription().getContent().contains("https://bit.ly/chilledcow-playlists"));
-    }
-
-    @Test
-    public void testGetUploaderName() throws ParsingException {
-        assertNotNull(extractor.getUploaderName());
-        assertFalse(extractor.getUploaderName().isEmpty());
-    }
-
-
-    @Test
-    public void testGetLength() throws ParsingException {
-        assertEquals(0, extractor.getLength());
-    }
-
-    @Test
-    public void testGetViewCount() throws ParsingException {
-        long count = extractor.getViewCount();
-        assertTrue(Long.toString(count), count > -1);
-    }
-
-    @Test
-    public void testGetUploadDate() throws ParsingException {
-        assertNull(extractor.getUploadDate());
-        assertNull(extractor.getTextualUploadDate());
-    }
-
-    @Test
-    public void testGetUploaderUrl() throws ParsingException {
-        assertEquals("https://www.youtube.com/channel/UCSJ4gkVC6NrvII8umztf0Ow", extractor.getUploaderUrl());
-    }
-
-    @Test
-    public void testGetThumbnailUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getThumbnailUrl());
-    }
-
-    @Test
-    public void testGetUploaderAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-    }
-
-    @Test
-    public void testGetAudioStreams() throws ExtractionException {
-        assertFalse(extractor.getAudioStreams().isEmpty());
-    }
-
-    @Test
-    public void testGetVideoStreams() throws ExtractionException {
-        for (VideoStream s : extractor.getVideoStreams()) {
-            assertIsSecureUrl(s.url);
-            assertTrue(s.resolution.length() > 0);
-            assertTrue(Integer.toString(s.getFormatId()),
-                    0 <= s.getFormatId() && s.getFormatId() <= 0x100);
-        }
-    }
-
-    @Test
-    public void testStreamType() throws ParsingException {
-        assertSame(extractor.getStreamType(), StreamType.LIVE_STREAM);
-    }
-
-    @Test
-    public void testGetDashMpd() throws ParsingException {
-        assertTrue(extractor.getDashMpdUrl().startsWith("https://manifest.googlevideo.com/api/manifest/dash/"));
-    }
-
-    @Test
-    public void testGetRelatedVideos() throws ExtractionException {
-        StreamInfoItemsCollector relatedVideos = extractor.getRelatedStreams();
-        Utils.printErrors(relatedVideos.getErrors());
-        assertFalse(relatedVideos.getItems().isEmpty());
-        assertTrue(relatedVideos.getErrors().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesListDefault() {
-        assertTrue(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesList() {
-        assertTrue(extractor.getSubtitles(MediaFormat.TTML).isEmpty());
+    @Override public StreamType expectedStreamType() { return StreamType.LIVE_STREAM; }
+    @Override public String expectedUploaderName() { return "ChilledCow"; }
+    @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCSJ4gkVC6NrvII8umztf0Ow"; }
+    @Override public List<String> expectedDescriptionContains() {
+        return Arrays.asList("https://bit.ly/chilledcow-playlists",
+                "https://bit.ly/chilledcow-submissions");
     }
+    @Override public long expectedLength() { return 0; }
+    @Override public long expectedTimestamp() { return TIMESTAMP; }
+    @Override public long expectedViewCountAtLeast() { return 0; }
+    @Nullable @Override public String expectedUploadDate() { return null; }
+    @Nullable @Override public String expectedTextualUploadDate() { return null; }
+    @Override public long expectedLikeCountAtLeast() { return 825000; }
+    @Override public long expectedDislikeCountAtLeast() { return 15600; }
+    @Override public boolean expectedHasSubtitles() { return false; }
+    @Override public boolean expectedHasFrames() { return false; }
 }
diff --git a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
index 49a851f4f..22b537ddd 100644
--- a/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
+++ b/extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorUnlistedTest.java
@@ -1,161 +1,50 @@
 package org.schabi.newpipe.extractor.services.youtube.stream;
 
-import org.junit.Assert;
 import org.junit.BeforeClass;
-import org.junit.Test;
 import org.schabi.newpipe.DownloaderTestImpl;
-import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.NewPipe;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
-import org.schabi.newpipe.extractor.stream.AudioStream;
-import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.services.DefaultStreamExtractorTest;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.stream.StreamType;
-import org.schabi.newpipe.extractor.stream.VideoStream;
-import org.schabi.newpipe.extractor.utils.Utils;
 
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.Calendar;
+import java.util.Arrays;
 import java.util.List;
 
-import static org.junit.Assert.*;
-import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
+import javax.annotation.Nullable;
+
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 
-public class YoutubeStreamExtractorUnlistedTest {
-    private static YoutubeStreamExtractor extractor;
+public class YoutubeStreamExtractorUnlistedTest extends DefaultStreamExtractorTest {
+    static final String ID = "udsB8KnIJTg";
+    static final String URL = YoutubeStreamExtractorDefaultTest.BASE_URL + ID;
+    private static StreamExtractor extractor;
 
     @BeforeClass
     public static void setUp() throws Exception {
         NewPipe.init(DownloaderTestImpl.getInstance());
-        extractor = (YoutubeStreamExtractor) YouTube
-                .getStreamExtractor("https://www.youtube.com/watch?v=udsB8KnIJTg");
+        extractor = YouTube.getStreamExtractor(URL);
         extractor.fetchPage();
     }
 
-    @Test
-    public void testGetInvalidTimeStamp() throws ParsingException {
-        assertTrue(extractor.getTimeStamp() + "",
-                extractor.getTimeStamp() <= 0);
-    }
+    @Override public StreamExtractor extractor() { return extractor; }
+    @Override public StreamingService expectedService() { return YouTube; }
+    @Override public String expectedName() { return "Praise the Casual: Ein Neuling trifft Dark Souls - Folge 5"; }
+    @Override public String expectedId() { return ID; }
+    @Override public String expectedUrlContains() { return URL; }
+    @Override public String expectedOriginalUrlContains() { return URL; }
 
-    @Test
-    public void testGetTitle() throws ParsingException {
-        assertFalse(extractor.getName().isEmpty());
-    }
-
-    @Test
-    public void testGetDescription() throws ParsingException {
-        assertNotNull(extractor.getDescription());
-        assertFalse(extractor.getDescription().getContent().isEmpty());
-    }
-
-    @Test
-    public void testGetFullLinksInDescription() throws ParsingException {
-        assertTrue(extractor.getDescription().getContent().contains("https://www.youtube.com/user/Roccowschiptune"));
-    }
-
-    @Test
-    public void testGetUploaderName() throws ParsingException {
-        assertNotNull(extractor.getUploaderName());
-        assertFalse(extractor.getUploaderName().isEmpty());
-    }
-
-
-    @Test
-    public void testGetLength() throws ParsingException {
-        assertEquals(2488, extractor.getLength());
-    }
-
-    @Test
-    public void testGetViewCount() throws ParsingException {
-        long count = extractor.getViewCount();
-        assertTrue(Long.toString(count), count >= /* specific to that video */ 1225);
-    }
-
-    @Test
-    public void testGetTextualUploadDate() throws ParsingException {
-        Assert.assertEquals("2017-09-22", extractor.getTextualUploadDate());
-    }
-
-    @Test
-    public void testGetUploadDate() throws ParsingException, ParseException {
-        final Calendar instance = Calendar.getInstance();
-        instance.setTime(new SimpleDateFormat("yyyy-MM-dd").parse("2017-09-22"));
-        assertNotNull(extractor.getUploadDate());
-        assertEquals(instance, extractor.getUploadDate().date());
-    }
-
-    @Test
-    public void testGetUploaderUrl() throws ParsingException {
-        assertEquals("https://www.youtube.com/channel/UCPysfiuOv4VKBeXFFPhKXyw", extractor.getUploaderUrl());
-    }
-
-    @Test
-    public void testGetThumbnailUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getThumbnailUrl());
-    }
-
-    @Test
-    public void testGetUploaderAvatarUrl() throws ParsingException {
-        assertIsSecureUrl(extractor.getUploaderAvatarUrl());
-    }
-
-    @Test
-    public void testGetAudioStreams() throws ExtractionException {
-        List<AudioStream> audioStreams = extractor.getAudioStreams();
-        assertFalse(audioStreams.isEmpty());
-        for (AudioStream s : audioStreams) {
-            assertIsSecureUrl(s.url);
-            assertTrue(Integer.toString(s.getFormatId()),
-                    0x100 <= s.getFormatId() && s.getFormatId() < 0x1000);
-        }
-    }
-
-    @Test
-    public void testGetVideoStreams() throws ExtractionException {
-        for (VideoStream s : extractor.getVideoStreams()) {
-            assertIsSecureUrl(s.url);
-            assertTrue(s.resolution.length() > 0);
-            assertTrue(Integer.toString(s.getFormatId()),
-                    0 <= s.getFormatId() && s.getFormatId() < 0x100);
-        }
-    }
-
-    @Test
-    public void testStreamType() throws ParsingException {
-        assertSame(StreamType.VIDEO_STREAM, extractor.getStreamType());
-    }
-
-    @Test
-    public void testGetRelatedVideos() throws ExtractionException {
-        StreamInfoItemsCollector relatedVideos = extractor.getRelatedStreams();
-        Utils.printErrors(relatedVideos.getErrors());
-        assertFalse(relatedVideos.getItems().isEmpty());
-        assertTrue(relatedVideos.getErrors().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesListDefault() {
-        assertFalse(extractor.getSubtitlesDefault().isEmpty());
-    }
-
-    @Test
-    public void testGetSubtitlesList() {
-        assertFalse(extractor.getSubtitles(MediaFormat.TTML).isEmpty());
-    }
-
-    @Test
-    public void testGetLikeCount() throws ParsingException {
-        long likeCount = extractor.getLikeCount();
-        assertTrue("" + likeCount, likeCount >= 96);
-    }
-
-    @Test
-    public void testGetDislikeCount() throws ParsingException {
-        long dislikeCount = extractor.getDislikeCount();
-        assertTrue("" + dislikeCount, dislikeCount >= 0);
+    @Override public StreamType expectedStreamType() { return StreamType.VIDEO_STREAM; }
+    @Override public String expectedUploaderName() { return "Hooked"; }
+    @Override public String expectedUploaderUrl() { return "https://www.youtube.com/channel/UCPysfiuOv4VKBeXFFPhKXyw"; }
+    @Override public List<String> expectedDescriptionContains() {
+        return Arrays.asList("https://www.youtube.com/user/Roccowschiptune",
+                "https://www.facebook.com/HookedMagazinDE");
     }
+    @Override public long expectedLength() { return 2488; }
+    @Override public long expectedViewCountAtLeast() { return 1500; }
+    @Nullable @Override public String expectedUploadDate() { return "2017-09-22 00:00:00.000"; }
+    @Nullable @Override public String expectedTextualUploadDate() { return "2017-09-22"; }
+    @Override public long expectedLikeCountAtLeast() { return 110; }
+    @Override public long expectedDislikeCountAtLeast() { return 0; }
 }