/**
  * @depends testReturnsPingResponse
  * @param PingResponse $response
  */
 public function testPutsKeyTimeStampFromResponseInThePingResponseWithUTC(PingResponse $response)
 {
     $expected = new \DateTime("2013-04-20 21:40:02", new \DateTimeZone("UTC"));
     $this->assertEquals($expected, $response->getKeyTimeStamp());
 }
 public function testGetKeyTimeStamp()
 {
     $stamp = new \DateTime("-10 minutes");
     $response = new PingResponse(new \DateTime(), null, $stamp);
     $this->assertSame($stamp, $response->getKeyTimeStamp());
 }