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