@covers Symfony\Component\DependencyInjection\Loader\ClosureLoader::supports
public function testSupports() {
$loader = new ClosureLoader(new ContainerBuilder());
$this
->assertTrue($loader
->supports(function ($container) {
}), '->supports() returns true if the resource is loadable');
$this
->assertFalse($loader
->supports('foo.foo'), '->supports() returns true if the resource is loadable');
}