CategoryChangesAsRdfTest::testCategorization: Failed asserting that two strings are equal.
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Description

This test is failing in various patches and blocking merge. The test itself seems like it has not been touched for months

https://gerrit.wikimedia.org/r/c/mediawiki/core/+/635910

https://gerrit.wikimedia.org/r/c/mediawiki/core/+/637032

https://gerrit.wikimedia.org/r/c/mediawiki/core/+/637574

https://gerrit.wikimedia.org/r/c/mediawiki/core/+/623837

There was 1 failure:

1) CategoryChangesAsRdfTest::testCategorization
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'# Changes\n
-DELETE {\n
-?category ?x ?y\n
-} WHERE {\n
-   ?category ?x ?y\n
-   VALUES ?category {\n
-     <http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L2> <http://acme.test/wiki/Category:CategoryChangesAsRdfTest_Page> <http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L1>\n
-   }\n
-};\n
-INSERT DATA {\n
-\n
-<http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L2> a mediawiki:Category ;\n
-	rdfs:label "CategoryChangesAsRdfTest L2" ;\n
-	mediawiki:pages "0"^^xsd:integer ;\n
-	mediawiki:subcategories "1"^^xsd:integer .\n
-\n
-<http://acme.test/wiki/Category:CategoryChangesAsRdfTest_Page> a mediawiki:Category ;\n
-	rdfs:label "CategoryChangesAsRdfTest Page" ;\n
-	mediawiki:pages "0"^^xsd:integer ;\n
-	mediawiki:subcategories "0"^^xsd:integer .\n
-\n
-<http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L1> a mediawiki:Category ;\n
-	rdfs:label "CategoryChangesAsRdfTest L1" ;\n
-	mediawiki:pages "0"^^xsd:integer ;\n
-	mediawiki:subcategories "1"^^xsd:integer .\n
-\n
-<http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L2> mediawiki:isInCategory <http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L1> .\n
-\n
-<http://acme.test/wiki/Category:CategoryChangesAsRdfTest_Page> mediawiki:isInCategory <http://acme.test/wiki/Category:CategoryChangesAsRdfTest_L2> .\n
-\n
-};\n
-'
+''

Details

Project	Branch	Lines +/-	Subject
mediawiki/core	master	+4 -7	categoryChangesAsRdfTest: Avoid RC purge which randomly breaks the test
mediawiki/core	wmf/1.36.0-wmf.14	+4 -0	[1.36.0-wmf.14] CategoryChangesAsRdfTest: Skip testCategorization
mediawiki/core	master	+4 -0	CategoryChangesAsRdfTest: Skip testCategorization

Customize query in gerrit

Event Timeline

Ammarpad created this task.Oct 29 2020, 11:56 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptOct 29 2020, 11:56 PM

Ammarpad triaged this task as High priority.Oct 29 2020, 11:57 PM

Ammarpad updated the task description. (Show Details)Oct 30 2020, 12:03 AM

Reedy added a project: MediaWiki-General.Oct 30 2020, 12:45 AM

Ammarpad updated the task description. (Show Details)Oct 30 2020, 1:19 AM

Can't merge into MW master -> UBN! status.

RhinosF1 added a subscriber: RhinosF1.Oct 30 2020, 7:53 AM

Umherirrender updated the task description. (Show Details)Oct 30 2020, 9:37 AM

The test is flaky. The failure is not db releated as sqlite also failing

On https://gerrit.wikimedia.org/r/c/mediawiki/core/+/637563 the mysql and the sqlite tests were failing

dcausse added a subscriber: dcausse.Oct 30 2020, 3:10 PM

Is it worth marking the test as broken in the meantime to unblock other merges?

In T266850#6591656, @Reedy wrote:

Is it worth marking the test as broken in the meantime to unblock other merges?

Probably / yes in my opinion

Change 637662 had a related patch set uploaded (by DannyS712; owner: DannyS712):
[mediawiki/core@master] CategoryChangesAsRdfTest: Skip testCategorization

https://gerrit.wikimedia.org/r/637662

gerritbot added a project: Patch-For-Review.Fri, Oct 30, 3:47 PM

Change 637662 merged by jenkins-bot:
[mediawiki/core@master] CategoryChangesAsRdfTest: Skip testCategorization

https://gerrit.wikimedia.org/r/637662

Reedy lowered the priority of this task from Unbreak Now! to High.Fri, Oct 30, 4:24 PM

dcausse edited projects, added Wikidata-Query-Service; removed Discovery.Fri, Oct 30, 4:39 PM

Restricted Application added a project: Wikidata. · View Herald TranscriptFri, Oct 30, 4:39 PM

dcausse removed a project: Wikidata.Fri, Oct 30, 4:39 PM

ReleaseTaggerBot added a project: MW-1.36-notes (1.36.0-wmf.16; 2020-11-03).Fri, Oct 30, 5:00 PM

Maintenance_bot removed a project: Patch-For-Review.Fri, Oct 30, 5:10 PM

CBogen edited projects, added Discovery-Search (Current work); removed Wikidata-Query-Service.Mon, Nov 2, 3:05 PM

CBogen set the point value for this task to 5.Mon, Nov 2, 6:30 PM

CBogen moved this task from Incoming to Ready for Development on the Discovery-Search (Current work) board.

Change 639932 had a related patch set uploaded (by Tim Starling; owner: DannyS712):
[mediawiki/core@wmf/1.36.0-wmf.14] [1.36.0-wmf.14] CategoryChangesAsRdfTest: Skip testCategorization

https://gerrit.wikimedia.org/r/639932

gerritbot added a project: Patch-For-Review.Mon, Nov 9, 12:20 AM

Change 639932 merged by jenkins-bot:
[mediawiki/core@wmf/1.36.0-wmf.14] [1.36.0-wmf.14] CategoryChangesAsRdfTest: Skip testCategorization

https://gerrit.wikimedia.org/r/639932

ReleaseTaggerBot edited projects, added MW-1.36-notes (1.36.0-wmf.14; 2020-10-20); removed MW-1.36-notes (1.36.0-wmf.16; 2020-11-03).Mon, Nov 9, 1:00 AM

By diffing the debug log between successful and failed test runs, I noticed that only the failed runs execute RecentChangesUpdateJob::purgeExpiredRows(). Inserting an unconditional call to this function into the test makes it fail unconditionally:

diff --git a/tests/phpunit/maintenance/categoryChangesAsRdfTest.php b/tests/phpunit/maintenance/categoryChangesAsRdfTest.php
index cb72be9a31..23240d96f8 100644
--- a/tests/phpunit/maintenance/categoryChangesAsRdfTest.php
+++ b/tests/phpunit/maintenance/categoryChangesAsRdfTest.php
@@ -282,6 +282,8 @@ class CategoryChangesAsRdfTest extends MediaWikiLangTestCase {
 		$runJobs->loadParamsAndArgs( null, [ 'quiet' => true, 'maxjobs' => 50 ] );
 		$runJobs->execute();
 
+		RecentChangesUpdateJob::newPurgeJob()->run();
+
 		$dbr = wfGetDB( DB_REPLICA );
 		$categoryChangesAsRdf = new CategoryChangesAsRdf();

The test sets the fake timestamp to 2020-07-31, and so recentchanges rows are inserted with this timestamp, but purgeExpiredRows() does not use the fake timestamp:

$cutoff = $dbw->timestamp( time() - $wgRCMaxAge );

And so the recentchanges rows needed by CategoryChangesAsRdf are deleted.

Instead of using the RunJobs maintenance subclass, I suggest following the example of RevertedTagUpdateIntegrationTest. Call MediaWikiServices::getInstance()->getJobRunner()->run() directly, specifying the types of jobs needed to make the test work.

Change 639958 had a related patch set uploaded (by Tim Starling; owner: Tim Starling):
[mediawiki/core@master] categoryChangesAsRdfTest: Avoid RC purge which randomly breaks the test

https://gerrit.wikimedia.org/r/639958

dcausse assigned this task to tstarling.Mon, Nov 9, 8:02 AM

dcausse moved this task from Ready for Development to To Be Deployed on the Discovery-Search (Current work) board.

Change 639958 merged by jenkins-bot:
[mediawiki/core@master] categoryChangesAsRdfTest: Avoid RC purge which randomly breaks the test

https://gerrit.wikimedia.org/r/639958

ReleaseTaggerBot edited projects, added MW-1.36-notes (1.36.0-wmf.18; 2020-11-17); removed MW-1.36-notes (1.36.0-wmf.14; 2020-10-20).Mon, Nov 9, 9:00 AM

dcausse moved this task from To Be Deployed to Needs Reporting on the Discovery-Search (Current work) board.Mon, Nov 16, 6:08 PM

Gehel closed this task as Resolved.Mon, Nov 23, 1:24 PM