class TestRunnerKernelTest

class TestRunnerKernelTest extends TestCase {
    
    /**
     * Data provider for self::testConstructor().
     */
    public function providerTestConstructor() {
        $core = [
            'core' => [
                'modules' => [
                    'system' => [
                        'system.info.yml' => 'type: module',
                    ],
                ],
            ],
        ];
        $tests = [];
        $tests['simpletest-in-contrib'] = [
            $core + [
                'modules' => [
                    'contrib' => [
                        'simpletest' => [
                            'simpletest.info.yml' => 'type: module',
                        ],
                    ],
                ],
            ],
            'modules/contrib/simpletest',
        ];
        $tests['simpletest-simpletest-in-contrib'] = [
            $core + [
                'modules' => [
                    'contrib' => [
                        'simpletest-simpletest' => [
                            'simpletest.info.yml' => 'type: module',
                        ],
                    ],
                ],
            ],
            'modules/contrib/simpletest-simpletest',
        ];
        $tests['simpletest-no-contrib'] = [
            $core + [
                'modules' => [
                    'simpletest' => [
                        'simpletest.info.yml' => 'type: module',
                    ],
                ],
            ],
            'modules/simpletest',
        ];
        $tests['no-simpletest'] = [
            $core,
            FALSE,
        ];
        return $tests;
    }
    
    /**
     * @covers ::__construct
     * @dataProvider providerTestConstructor
     */
    public function testConstructor($file_system, $expected) {
        // Set up the file system.
        $vfs = vfsStream::setup('root');
        vfsStream::create($file_system, $vfs);
        $kernel = new TestRunnerKernel('prod', new ClassLoader(), FALSE, vfsStream::url('root'));
        $class = new \ReflectionClass(TestRunnerKernel::class);
        $instance_method = $class->getMethod('moduleData');
        $instance_method->setAccessible(TRUE);
        
        /** @var \Drupal\Core\Extension\Extension $extension */
        $extension = $instance_method->invoke($kernel, 'simpletest');
        if ($expected === FALSE) {
            $this->assertFalse($extension);
        }
        else {
            $this->assertInstanceOf(Extension::class, $extension);
            $this->assertSame($expected, $extension->getPath());
        }
    }

}