### Question:
MatrixResponseInfo { public long getTimeStamp() { return timeStamp; } MatrixResponseInfo(MatrixRequest request); void setGraphDate(String graphDate); String getAttribution(); String getOsmFileMD5Hash(); String getService(); long getTimeStamp(); MatrixRequest getRequest(); EngineInfo getEngineInfo();  }### Answer:
@Test public void getTimeStampTest() { Assert.assertTrue(Long.toString(responseInformation.getTimeStamp()).length() > 0); }