MediaWikiTestCaseTrait::creatNoOpMock should permit calling destructors
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Description

rMW709773ab5747: createNoOpMock() method for PHPUnit tests is awesome, but causes issues when mocking a class that implement __destruct. According to the documentation about destructors these will be called as soon as there are no other references to a particular object. I.E. unconditionally.

MovePageTest did include this; it had

$mock->expects( $this->never() )->method( $this->anythingBut( '__destruct' ) );

$mock->expects( $this->never() )->method( $this->anything() );

found in MediaWikiTestCaseTrait::creatNoOpMock.

Details

	Project	Branch	Lines +/-	Subject
	mediawiki/core	master	+1 -1	Permit destructors in MediaWikiTestCaseTrait::createNoOpMock

Customize query in gerrit

Related Objects

Mentioned In: T280780: "Language::__destruct() was not expected to be called." failure due to garbage collector brings PHPUnit down
Mentioned Here: rMW709773ab5747: createNoOpMock() method for PHPUnit tests

Event Timeline

Mainframe98 created this task.Aug 30 2019, 3:24 PM

Change 533543 had a related patch set uploaded (by Mainframe98; owner: Mainframe98):
[mediawiki/core@master] Permit destructors in MediaWikiTestCaseTrait::createNoOpMock

https://gerrit.wikimedia.org/r/533543

gerritbot added a project: Patch-For-Review.Aug 30 2019, 3:27 PM

Is this actually causing problems? MovePage did have it because destruct would actually get called, but now it seems it doesn't. Why would destruct actually get called on the mock? It seems it doesn't really get called every time an object is destroyed.

I tried mocking the Language class, and all the tests that used creatNoOpMock() to mock Language failed until I added the exception for the destructor.

To give an example:

Using PHP 7.2.13-1+0~20181207100540.13+stretch~1.gbpf57305
PHPUnit 6.5.14 by Sebastian Bergmann and contributors.

.............................................................   61 / 1302 (  4%)
.............................................................  122 / 1302 (  9%)
.............................................................  183 / 1302 ( 14%)
........................................................IIIII  244 / 1302 ( 18%)
IIIIIIIIIII..................................................  305 / 1302 ( 23%)
..WW.........................................................  366 / 1302 ( 28%)
.............................................................  427 / 1302 ( 32%)
.............................................................  488 / 1302 ( 37%)
.............................................................  549 / 1302 ( 42%)
.............................................................  610 / 1302 ( 46%)
........................................F....................  671 / 1302 ( 51%)
.............................................................  732 / 1302 ( 56%)
.............................................................  793 / 1302 ( 60%)
.............................................................  854 / 1302 ( 65%)
......................................FFFFFF.................  915 / 1302 ( 70%)
...................................................F.........  976 / 1302 ( 74%)
....Language::__destruct() was not expected to be called.
vagrant@vagrant:~$

is the output I get. Makes it rather difficult to find out where the error is.

Change 533543 merged by jenkins-bot:
[mediawiki/core@master] Permit destructors in MediaWikiTestCaseTrait::createNoOpMock

https://gerrit.wikimedia.org/r/533543

Mainframe98 closed this task as Resolved.Sep 2 2019, 11:13 AM

Mainframe98 triaged this task as Medium priority.

Mainframe98 removed a project: Patch-For-Review.

ReleaseTaggerBot added a project: MW-1.34-notes (1.34.0-wmf.21; 2019-09-03).Sep 2 2019, 12:00 PM

Mainframe98 mentioned this in T280780: "Language::__destruct() was not expected to be called." failure due to garbage collector brings PHPUnit down.Apr 21 2021, 12:41 PM