public function testCatHasFluidInterfaces()
{
@($cat = new Cat());
$obj = $cat->setName('Gatto');
$this->assertInstanceOf('\\Animals\\Cat', $obj);
$obj = $cat->setAge(3);
$this->assertInstanceOf('\\Animals\\Cat', $obj);
$obj = $cat->setFavoriteFood('fish');
$this->assertInstanceOf('\\Animals\\Cat', $obj);
}
