Extension\ExtendedInterfaceTest::testCheckInterfaceExtending PHP Method

    public function testCheckInterfaceExtending()
    {
        $refl = new \ReflectionClass('Test\\ExtendedInterface');
        $this->assertTrue($refl->isInterface());
        $this->assertContains('IteratorAggregate', $refl->getInterfaceNames());
        $this->assertContains('Countable', $refl->getInterfaceNames());
    }