public function testParentClassName()
{
$class = new PhpClass();
$this->assertNull($class->getParentClassName());
$this->assertSame($class, $class->setParentClassName('stdClass'));
$this->assertEquals('stdClass', $class->getParentClassName());
$this->assertSame($class, $class->setParentClassName(null));
$this->assertNull($class->getParentClassName());
}