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Fixing up tests and the bugs they exposed #871

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@vludax vludax commented Jul 8, 2022

  • I carefully read the contribution guidelines and agree to them.
  • I have tested the API against NewPipe.
  • I agree to create a pull request for NewPipe as soon as possible to make it compatible with the changed API.

Attempting to fix CI issues. Tested a local build with NewPipe. Let me know if you believe this should rather be done in a series of separate PRs, or there are better solutions :)

Sorry, something went wrong.

Vladyslav Kalinin added 3 commits July 8, 2022 22:32

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SpicyLemon Daniel Wedul
@@ -233,7 +233,7 @@ private YoutubeParsingHelper() {
* The three digits at the end can be random, but are required.
* </p>
*/
private static final String CONSENT_COOKIE_VALUE = "PENDING+";
private static final String CONSENT_COOKIE_VALUE = "YES+";
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This is to address #820

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No, do not change this at all. By using YES+, you allow Google to track usage of users and so to establish profiles based on what they search, they browse and they watch, using the YouTube requests made by the extractor. The NewPipe projects aim to protect as much as possible users' privacy, so we will not accept this change globally.

Instead, allow only the ability to set the YES+ cookie in YoutubeMixPlaylistExtractor, but disable it by default. That's I wanted to do in a future PR (because I wanted #863 to be merged first, but I have some changes to do in it first). Based on the changes of this PR in YoutubeMixPlaylistExtractor, you can find what I did here: https://github.com/AudricV/NewPipeExtractor/commits/consent-cookie-yes%2B-for-yt-mixes-option.

If you want to apply them, you can reuse (partially or not) my changes, but do not add the Content-Length header in the requests like I did (see #863 (comment) to know why I say this).

Then enable usage of this cookie value in test classes of YoutubeMixPlaylistExtractorTest, for each test (like I did).

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Happy to apply these changes, although if we only use the YES+ cookie in tests, would that mean the mix extractor won't work for users in the EU?

Btw, any clue how I can test this extractor in NewPipe app? 😅
I've tried searching for playlists, but none of them seem to be youtube mixes.

@@ -89,7 +89,7 @@ public void onFetchPage(@Nonnull final Downloader downloader)
final byte[] body = JsonWriter.string(jsonBody.done()).getBytes(StandardCharsets.UTF_8);

final Map<String, List<String>> headers = new HashMap<>();
addClientInfoHeaders(headers);
addYouTubeHeaders(headers);
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addYouTubeHeaders adds the consent cookie in addition to calling addClientInfoHeaders

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See above.

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Thank you for the pull request.

Unfortunately, you will have to change how you fix some tests (see the review comments).

Also, when updating YouTube tests, please test your changes with the mock downloader and, if needed, update the relevant test mocks by running the tests using the recording downloader, then test again the changes with the mock downloader to be sure that everything works properly when using this one.

For more details about how mocks work in the extractor, don't hesitate to take a look at our documentation :)

@@ -233,7 +233,7 @@ private YoutubeParsingHelper() {
* The three digits at the end can be random, but are required.
* </p>
*/
private static final String CONSENT_COOKIE_VALUE = "PENDING+";
private static final String CONSENT_COOKIE_VALUE = "YES+";
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No, do not change this at all. By using YES+, you allow Google to track usage of users and so to establish profiles based on what they search, they browse and they watch, using the YouTube requests made by the extractor. The NewPipe projects aim to protect as much as possible users' privacy, so we will not accept this change globally.

Instead, allow only the ability to set the YES+ cookie in YoutubeMixPlaylistExtractor, but disable it by default. That's I wanted to do in a future PR (because I wanted #863 to be merged first, but I have some changes to do in it first). Based on the changes of this PR in YoutubeMixPlaylistExtractor, you can find what I did here: https://github.com/AudricV/NewPipeExtractor/commits/consent-cookie-yes%2B-for-yt-mixes-option.

If you want to apply them, you can reuse (partially or not) my changes, but do not add the Content-Length header in the requests like I did (see #863 (comment) to know why I say this).

Then enable usage of this cookie value in test classes of YoutubeMixPlaylistExtractorTest, for each test (like I did).

@@ -89,7 +89,7 @@ public void onFetchPage(@Nonnull final Downloader downloader)
final byte[] body = JsonWriter.string(jsonBody.done()).getBytes(StandardCharsets.UTF_8);

final Map<String, List<String>> headers = new HashMap<>();
addClientInfoHeaders(headers);
addYouTubeHeaders(headers);
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See above.


return firstContent.has("didYouMeanRenderer")
|| firstContent.has("showingResultsForRenderer");
return this.getSearchSuggestion() != "";
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Do you really need the usage of this? If not, can you remove it, please (not really an issue)?

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No worries, will remove.

@@ -83,8 +83,7 @@ public void testAlbumSearch() throws ExtractionException, IOException {
assertEquals("https://c418.bandcamp.com/album/minecraft-volume-alpha", minecraft.getUrl());

// Verify that playlist tracks counts get extracted correctly
assertEquals(24, ((PlaylistInfoItem) minecraft).getStreamCount());

assertTrue(((PlaylistInfoItem) minecraft).getStreamCount() > 0);
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The failure was not on the stream count, according to the latest scheduled tests (that you can see in the Actions tab of the repository), it was on the first item returned by the search results. The latest run does not have this issue, so I think that's a intermittent issue which can be ignored.

You may revert these changes if you can't reproduce them.

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It seems like the metadata for this particular video changes back and forth.. When changed the name, the image started to fail, and then there were only 3 streams reported. Perhaps we could just use a different video here?

Comment on lines -410 to -417
@Override public List<MetaInfo> expectedMetaInfo() throws MalformedURLException {
return Collections.singletonList(new MetaInfo(
EMPTY_STRING,
new Description("Funk is a German public broadcast service.", Description.PLAIN_TEXT),
Collections.singletonList(new URL("https://de.wikipedia.org/wiki/Funk_(Medienangebot)?wprov=yicw1")),
Collections.singletonList("Wikipedia (German)")
));
}
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As the goal of this test is to test if MetaInfos are extracted properly from videos metadata, you will have to find a new video with a MetaInfo and update all the relevant assertions instead of removing the test (and maybe also the test class name and the name of the folder in which mocks are saved).

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No other tests in this file seem to be overriding expectedMetaInfo. I actually suspect the YoutubeStreamExtractor currently can't extract meta info -- it is contained within the videoPrimaryInfoRenderer and videoSecondaryInfoRenderer objects rather than there the current YoutubeParsingHelper.getMetaInfo() is looking for it. How would we better address this?

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vludax commented Jul 9, 2022

Appreciate your timely feedback @AudricV! I'll address the comments in a week's time when I get my laptop back 😀

@@ -57,9 +57,9 @@ public void testUploaderName() throws Exception {
@Override public long expectedLength() { return 0; }
@Override public long expectedTimestamp() { return TIMESTAMP; }
@Override public long expectedViewCountAtLeast() { return 0; }
@Nullable @Override public String expectedUploadDate() { return "2020-02-22 00:00:00.000"; }
@Nullable @Override public String expectedTextualUploadDate() { return "2020-02-22"; }
@Override public long expectedLikeCountAtLeast() { return 825000; }
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They've replaced the stream that was referenced by the test previously. Tests against live streams seem rather fragile -- do we have a better approach to this? Just testing against mocks?
Would be good to still test against the live API.. so perhaps, just find the first stream and check that we can extract non-empty values?

@litetex litetex mentioned this pull request Jul 30, 2022
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litetex commented Jul 30, 2022

Superseded by #882.

Thank you for your effort.

@litetex litetex closed this Jul 30, 2022
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3 participants