PHPUnit 10-dev: previous version cache raises "Argument 2 passed to PHPUnit\Runner\DefaultTestResultCache::setStatus() must be an instance of PHPUnit\Framework\TestStatus\TestStatus, int given, called in ./vendor/phpunit/phpunit/src/Runner/DefaultTestResultCache.php on line 174"

[Slamdunk]

Q	A
PHPUnit version	10.0.x-dev
PHP version	7.4.14
Installation Method	Composer

Summary

After upgrading to PHPUnit 10-dev with a PHPUnit 9 cache present in .phpunit.result.cache, the run fails immediately

Current behavior

$ vendor/bin/phpunit
Argument 2 passed to PHPUnit\Runner\DefaultTestResultCache::setStatus() must be an instance
of PHPUnit\Framework\TestStatus\TestStatus, int given, called in
./vendor/phpunit/phpunit/src/Runner/DefaultTestResultCache.php on line 174

Expected behavior

I suggest to either:

1. Check the cache version before using it, and dismiss it if not matching with current runtime
2. Pinpoint to clear the cache in the ChangeLog-10.0.md

[Slamdunk]

Note: we should also check that php-code-coverage cache version upgrade works seamlessly.

[sebastianbergmann]

I have changed the implementation of DefaultTestResultCache to not use serialize() / unserialize() at all.