Unit tests fail on PHP 8.1 and above

[leewillis77]

Not sure what the issue is here exactly, but the unit tests (for the 4.x branch) currently fail on PHP 8.1 or higher:

PHP 8.0

PHPUnit 8.5.40 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.0.30
Configuration: /Users/lee/git_repos/container/phpunit.xml
Error:         This version of PHPUnit does not support code coverage on PHP 8

................................................................. 65 / 72 ( 90%)
.......                                                           72 / 72 (100%)

Time: 59 ms, Memory: 6.00 MB

OK (72 tests, 182 assertions)

PHP 8.1

PHPUnit 8.5.40 by Sebastian Bergmann and contributors.

Runtime:       PHP 8.1.30
Configuration: /Users/lee/git_repos/container/phpunit.xml
Error:         This version of PHPUnit does not support code coverage on PHP 8

..E.F............................................................ 65 / 72 ( 90%)
.......                                                           72 / 72 (100%)

Time: 65 ms, Memory: 6.00 MB

There was 1 error:

1) League\Container\Test\Argument\ArgumentResolverTest::testResolverResolvesArgumentsViaReflection
Error: Call to undefined method ReflectionUnionType::getName()

/Users/lee/git_repos/container/tests/Argument/ArgumentResolverTest.php:81

--

There was 1 failure:

1) League\Container\Test\Argument\ArgumentResolverTest::testResolverThrowsExceptionWhenReflectionDoesNotResolve
Failed asserting that exception of type "Error" matches expected exception "Psr\Container\NotFoundExceptionInterface". Message was: "Call to undefined method ReflectionUnionType::getName()" at
/Users/lee/git_repos/container/tests/Argument/ArgumentResolverTest.php:134

[philipobenito]

It's a change in the reflection API, while it isn't ideal, there is some funkery going on in the CI pipeline to make it okay. This will be solved properly in the next major release though as it drops support for old versions of PHP