public void TestGetTimezoneByLatitudeAndLongitude()
        {
            serviceMock.Setup(x => x.GetIANATimezone(It.IsAny <double>(), It.IsAny <double>())).Returns(new TimeZoneResult());
            var response = controller.GetTimezoneByLatitudeAndLongitude(1.0, 1.0);

            Assert.IsInstanceOfType(response, typeof(OkNegotiatedContentResult <TimeZoneResult>));
            serviceMock.Verify(x => x.GetIANATimezone(It.IsAny <double>(), It.IsAny <double>()), Times.Once());
        }