class ContainerDerivativeDiscoveryDecoratorTest

class ContainerDerivativeDiscoveryDecoratorTest extends UnitTestCase {
    
    /**
     * @covers ::getDefinitions
     */
    public function testGetDefinitions() : void {
        $example_service = $this->createMock('Symfony\\Contracts\\EventDispatcher\\EventDispatcherInterface');
        $example_container = $this->getMockBuilder('Symfony\\Component\\DependencyInjection\\ContainerBuilder')
            ->onlyMethods([
            'get',
        ])
            ->getMock();
        $example_container->expects($this->once())
            ->method('get')
            ->with($this->equalTo('example_service'))
            ->willReturn($example_service);
        \Drupal::setContainer($example_container);
        $definitions = [];
        $definitions['container_aware_discovery'] = [
            'id' => 'container_aware_discovery',
            'deriver' => '\\Drupal\\Tests\\Core\\Plugin\\Discovery\\TestContainerDerivativeDiscovery',
        ];
        $definitions['non_container_aware_discovery'] = [
            'id' => 'non_container_aware_discovery',
            'deriver' => '\\Drupal\\Tests\\Core\\Plugin\\Discovery\\TestDerivativeDiscovery',
        ];
        $discovery_main = $this->createMock('Drupal\\Component\\Plugin\\Discovery\\DiscoveryInterface');
        $discovery_main->expects($this->any())
            ->method('getDefinitions')
            ->willReturn($definitions);
        $discovery = new ContainerDerivativeDiscoveryDecorator($discovery_main);
        $definitions = $discovery->getDefinitions();
        // Ensure that both the instances from container and non-container test derivatives got added.
        $this->assertCount(4, $definitions);
    }

}