class ClassFinderTest

class ClassFinderTest extends TestCase {
    
    /**
     * @covers ::findFile
     */
    public function testFindFile() : void {
        $finder = new ClassFinder();
        // The full path is returned therefore only tests with
        // assertStringEndsWith() so the test is portable.
        $expected_path = str_replace('/', DIRECTORY_SEPARATOR, 'core/tests/Drupal/Tests/Component/ClassFinder/ClassFinderTest.php');
        $this->assertStringEndsWith($expected_path, $finder->findFile(ClassFinderTest::class));
        $class = 'Not\\A\\Class';
        $this->assertNull($finder->findFile($class));
        // Register an autoloader that can find this class.
        $loader = new ClassLoader();
        $loader->addClassMap([
            $class => __FILE__,
        ]);
        $loader->register();
        $this->assertEquals(__FILE__, $finder->findFile($class));
        // This shouldn't prevent us from finding the original file.
        $this->assertStringEndsWith($expected_path, $finder->findFile(ClassFinderTest::class));
        // Clean up the additional autoloader after the test.
        $loader->unregister();
    }

}