public function testHasImplementedInterfaces()
{
$this->assertFalse($this->class->hasImplementedInterfaces());
$this->class->addImplementedInterface('IteratorAggregate');
$this->assertTrue($this->class->hasImplementedInterfaces());
$this->class->removeImplementedInterface('IteratorAggregate');
$this->assertFalse($this->class->hasImplementedInterfaces());
}