Prefix mock file from RecordingDownloader with "generated_mock_"

Only read those files in MockDownloader

extractor/src/test/java/org/schabi/newpipe/downloader/MockDownloader.java

@@ -24,6 +24,7 @@ class MockDownloader extends Downloader {
         this.mocks = new HashMap<>();
         File folder = new File(path);
         for (File file : folder.listFiles()) {
+            if (file.getName().startsWith(RecordingDownloader.FILE_NAME_PREFIX)) {
                 final FileReader reader = new FileReader(file);
                 final TestRequestResponse response = new GsonBuilder()
                         .create()
@@ -32,6 +33,7 @@ class MockDownloader extends Downloader {
                 mocks.put(response.getRequest(), response.getResponse());
             }
         }
+    }
 
     @Override
     public Response execute(@Nonnull Request request) {

extractor/src/test/java/org/schabi/newpipe/downloader/RecordingDownloader.java

@@ -19,6 +19,8 @@ import javax.annotation.Nonnull;
 
 class RecordingDownloader extends Downloader {
 
+    public final static String FILE_NAME_PREFIX = "generated_mock_";
+
     private int index = 0;
     private final String path;
 
@@ -37,7 +39,7 @@ class RecordingDownloader extends Downloader {
         Downloader downloader = DownloaderTestImpl.getInstance();
         Response response = downloader.execute(request);
 
-        File outputFile = new File(path + File.separator + index + ".json");
+        File outputFile = new File(path + File.separator + FILE_NAME_PREFIX + index + ".json");
         index++;
         outputFile.createNewFile();
         FileWriter writer = new FileWriter(outputFile);

extractor/src/test/java/org/schabi/newpipe/downloader/TestRequestResponse.java

@@ -4,20 +4,14 @@ import org.schabi.newpipe.extractor.downloader.Request;
 import org.schabi.newpipe.extractor.downloader.Response;
 
 final class TestRequestResponse {
-    private final String comment;
     private final Request request;
     private final Response response;
 
     public TestRequestResponse(Request request, Response response) {
-        this.comment = "Auto-generated for tests. See RecordingDownloader";
         this.request = request;
         this.response = response;
     }
 
-    public String getComment() {
-        return comment;
-    }
-
     public Request getRequest() {
         return request;
     }