paratest: "Coverage file /tmp/CV_L8DgkT is empty. This means a PHPUnit process has crashed." when running with "--coverage-clover"

Q	A
ParaTest version	6.2.0
PHPUnit version	9.5.2
PHP version	7.4

Summary

“Coverage file /tmp/CV_L8DgkT is empty. This means a PHPUnit process has crashed.” when running with “–coverage-clover” on every CircleCI, AWS CodeBuild & Docker builds (works fine locally on mac)

Previously posted #397 - But looks like it was closed without a solution

Current behavior

1st test in the suite passes, second immediately fails with the previously mentioned error.

How to reproduce: command, code and error stack trace

Command being run: ./vendor/bin/paratest -p 8 --coverage-clover deployment/coverage.xml --verbose

Stacktrace of the error with the --verbose flag added:

In CoverageMerger.php line 59:
                                                                               
  [ParaTest\Coverage\EmptyCoverageFileException]                               
  Coverage file /tmp/CV_L8DgkT is empty. This means a PHPUnit process has cra  
  shed.                                                                        
                                                                               

Exception trace:
  at /root/project/vendor/brianium/paratest/src/Coverage/CoverageMerger.php:59
 ParaTest\Coverage\CoverageMerger->addCoverageFromFile() at /root/project/vendor/brianium/paratest/src/Runners/PHPUnit/Runner.php:118
 ParaTest\Runners\PHPUnit\Runner->testIsStillRunning() at /root/project/vendor/brianium/paratest/src/Runners/PHPUnit/Runner.php:43
 ParaTest\Runners\PHPUnit\Runner->doRun() at /root/project/vendor/brianium/paratest/src/Runners/PHPUnit/BaseRunner.php:81
 ParaTest\Runners\PHPUnit\BaseRunner->run() at /root/project/vendor/brianium/paratest/src/Console/Commands/ParaTestCommand.php:84
 ParaTest\Console\Commands\ParaTestCommand->execute() at /root/project/vendor/symfony/console/Command/Command.php:256
 Symfony\Component\Console\Command\Command->run() at /root/project/vendor/symfony/console/Application.php:971
 Symfony\Component\Console\Application->doRunCommand() at /root/project/vendor/symfony/console/Application.php:290
 Symfony\Component\Console\Application->doRun() at /root/project/vendor/symfony/console/Application.php:166
 Symfony\Component\Console\Application->run() at /root/project/vendor/brianium/paratest/bin/paratest:37

Expected behavior

Test suite runs as expected and a code coverage report is compiled.

Additional information

Looking through the code, won’t this always happen?

TheCoverageMerger::addCoverageFromFile function fails over on these conditions: ! is_file($coverageFile) || filesize($coverageFile) === 0

Which is previously calling ExecutableTest::touchTempFile which will always be 0 size until data is added in (this is under the assumption that it is in fact a file, it just fails over on the size).

Apologies if the “Additional Information” is just my lack of understanding with the process.

About this issue

Original URL
State: closed
Created 3 years ago
Reactions: 1
Comments: 23 (5 by maintainers)

Most upvoted comments

Yeah, thanks guys. Worked for me too with GitHub Actions:

- name: Run tests
   run: XDEBUG_MODE=coverage php artisan test --parallel --coverage --min=80

rihardsgrislis on Nov 17, 2021

I met the same problem. what is your Xdebug.mode? by default,it is devlop. when I change to xdebug.mode=coverage, paratest coverage test works! Here is my Xdebug config in php.ini

[xdebug]
xdebug.mode=coverage
xdebug.client_host=127.0.0.1
xdebug.client_port=9003

NinoPanic on Oct 11, 2021

I can confirm that setting xdebug.mode=coverage fixes the issue.

Edit: …or it does not. I modified my CI pipeline like so:

$ echo "xdebug.mode=coverage" > /usr/local/etc/php/conf.d/xdebug.ini
$ php artisan test --parallel --recreate-databases --testsuite=Core,Feature --log-junit=junit.xml --coverage-cobertura=coverage-cobertura.xml

After this change, it did work a few times - but then it failed on a later attempt. This error seems to come up somewhat randomly.

spawnia on Nov 16, 2021