False positive of unused use inside willReturnCallback() and match()

[cheldt]

Example:

public function testBaz(): void
{
    $barMock = $this->createMock(Bar::class);

    $matcher = self::exactly(2);
    $barMock->expects($matcher)->method('bar')
        ->willReturnCallback(
            static function (string $test) use ($matcher): string {
                match ($matcher->numberOfInvocations()) {
                    1 => self::assertEquals('test1', $test),
                    2 => self::assertEquals('test2', $test),
                    default => new \LogicException()
                };

                return $test;
            }
        );

    $sut = new Foo($barMock);

    $sut->baz('test1');
    $sut->baz('test2');
}

 ------ ------------------------------------------------ 
  Line   tests/FoobarTest.php                            
 ------ ------------------------------------------------ 
  18     Anonymous function has an unused use $matcher.  
 ------ ------------------------------------------------ 

Context

• php 8.2.7
• phpunit/phpunit 10.2.2
• phpstan/phpstan-phpunit 1.3.13
• phpstan/phpstan-deprecation-rules 1.1.3
• phpstan/phpstan-strict-rules 1.5

I slapped a tiny test-project together, which demonstrates the issue: https://github.com/cheldt/unused

Thanks for any help :)

[ondrejmirtes]

Fixed in PHPStan 1.10.21 https://github.com/phpstan/phpstan/releases/tag/1.10.21

[cheldt]

Thanks!

[github-actions[bot]]

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