public function testGetPropertyValue()
 {
     $class = new TestClass();
     $this->assertNull($class->getTestProperty());
     $this->assertNull(ReflectionClass::from($class)->getPropertyValue('test_property'));
     $class->setTestProperty('foo');
     $this->assertSame('foo', ReflectionClass::from($class)->getPropertyValue('test_property'));
 }