Improve assertTabsContain() to also check size

extractor/src/test/java/org/schabi/newpipe/extractor/ExtractorAsserts.java

@@ -171,8 +171,17 @@ public class ExtractorAsserts {
     public static void assertTabsContain(@Nonnull final List<ListLinkHandler> tabs,
                                          @Nonnull final String... expectedTabs) {
         final Set<String> tabSet = tabs.stream()
-                .map(linkHandler -> linkHandler.getContentFilters().get(0))
+                .map(linkHandler -> {
+                    assertEquals(1, linkHandler.getContentFilters().size(),
+                            "Unexpected content filters for channel tab: "
+                                    + linkHandler.getContentFilters());
+                    return linkHandler.getContentFilters().get(0);
+                })
                 .collect(Collectors.toUnmodifiableSet());
+
+        assertEquals(expectedTabs.length, tabSet.size(),
+                "Different amount of tabs returned:\nExpected: "
+                + Arrays.toString(expectedTabs) + "\nActual: " + tabSet);
         Arrays.stream(expectedTabs)
                 .forEach(expectedTab -> assertTrue(tabSet.contains(expectedTab),
                         "Missing " + expectedTab + " tab (got " + tabSet + ")"));

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeChannelExtractorTest.java

@@ -541,7 +541,8 @@ public class YoutubeChannelExtractorTest {
         @Test
         @Override
         public void testTabs() throws Exception {
-            assertTabsContain(extractor.getTabs(), ChannelTabs.VIDEOS, ChannelTabs.PLAYLISTS);
+            assertTabsContain(extractor.getTabs(),
+                    ChannelTabs.VIDEOS, ChannelTabs.PLAYLISTS, ChannelTabs.SHORTS);
             assertTrue(extractor.getTabs().stream()
                     .filter(it -> ChannelTabs.VIDEOS.equals(it.getContentFilters().get(0)))
                     .allMatch(ReadyChannelTabListLinkHandler.class::isInstance));
@@ -920,11 +921,7 @@ public class YoutubeChannelExtractorTest {
             // Gaming topic channels tabs are not yet supported
             // However, a Shorts tab like on other channel types is returned, so it is supported
             // Check that it is returned
-            final List<ListLinkHandler> channelTabs = extractor.getTabs();
-            assertEquals(1, channelTabs.size());
-            final List<String> contentFilters = channelTabs.get(0).getContentFilters();
-            assertEquals(1, contentFilters.size());
-            assertEquals(ChannelTabs.SHORTS, contentFilters.get(0));
+            assertTabsContain(extractor.getTabs(), ChannelTabs.SHORTS);
         }
 
         @Test