public function testAbstract()
{
$class = new PhpClass();
$this->assertFalse($class->isAbstract());
$this->assertSame($class, $class->setAbstract(true));
$this->assertTrue($class->isAbstract());
$this->assertSame($class, $class->setAbstract(false));
$this->assertFalse($class->isAbstract());
}