make the output from --list-tests usable as a --filter parameter when there is a data provider

[joachim-n]

If I use --list-tests, I get a list of all the data sets from the data provider:

$ vendor/bin/phpunit Test/Unit/ComponentPHPFile8Test.php --list-tests
PHPUnit 7.5.20 by Sebastian Bergmann and contributors.

Available test(s):
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"nothing"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"PHPStorm type var first"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"PHPStorm type class first"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"parameter typehint"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"static call"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"class"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"new"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"repeated"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"current"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"docblock param"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"comment"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"quoted class name"
 - DrupalCodeBuilder\Test\Unit\ComponentPHPFile8Test::testQualifiedClassNameExtraction"double quoted class name"

However, these are not in a format that (AFAIK) can be used with the --filter option. That needs an @ before the quote marks (and the quote marks are only needed if there are spaces in the data set name):

$ vendor/bin/phpunit Test/Unit/ComponentPHPFile8Test.php --filter=testQualifiedClassNameExtraction@"parameter typehint"

Proposed improvement: print the '@' between the method name and the dataset name in the output, so it's easier to copy-paste it to run a test.

[perk11]

I'm looking for a way to run tests in parallel, invoking --filter to run phpunit with just a single test, and currently there is no easy way to get a list of tests in a test suite that could be passed back to --filter.

[mfn]

@perk11 you may be interested in #4449

• uses existing --list-tests-xml
• (needs external software to split the XML, PoC provided)
• adds the ability to feed such a XML list back and only execute these tests

[perk11]

Thanks, that looks like it can work. I found that paratest can already do what I need, but for something more custom or even to make building something like paratest possible that doesn't depend on PHPUnit internals, #4449 would be a useful change.