[YouTube] Fix InteractiveTabbedHeader.testTabs test

YouTube now returns a Shorts tab for InteractiveTabbedHeader gaming channels,
which contains Shorts about the game of the topic channel but are not uploaded
on the game topic channel.

As this tab is already supported by the extractor, fetching a gaming topic
channel now returns a tab instead of none.

Channel name and channel URL of these Shorts needs to be set to null in a
separate commit, as Shorts on this tab do not have the topic channel as their
uploader.

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

@@ -25,6 +25,7 @@ import org.schabi.newpipe.extractor.channel.tabs.ChannelTabs;
 import org.schabi.newpipe.extractor.exceptions.AccountTerminatedException;
 import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
 import org.schabi.newpipe.extractor.linkhandler.ReadyChannelTabListLinkHandler;
 import org.schabi.newpipe.extractor.services.BaseChannelExtractorTest;
 import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeChannelExtractor;
@@ -916,8 +917,14 @@ public class YoutubeChannelExtractorTest {
         @Test
         @Override
         public void testTabs() throws Exception {
-            // Gaming topic channels tabs are not yet supported, so an empty list should be returned
-            assertTrue(extractor.getTabs().isEmpty());
+            // 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));
         }
 
         @Test