public function testToStringChildrendAnnotation()
 {
     $annotationBlock = new PhpAnnotationBlock();
     $annotationBlock->addChild(new PhpAnnotation('date', '2015-01-01'))->addChild(new PhpAnnotation('author', 'PhpTeam'))->addChild('This annotation is useful!');
     $this->assertSame("/**\n * @date 2015-01-01\n * @author PhpTeam\n * This annotation is useful!\n */", $annotationBlock->toString());
 }