public void GetUserByIdFailureTest()
{
// Arrange
int UserId = 4;
UserApiController controller = new UserApiController();
controller.Request = new HttpRequestMessage();
controller.Configuration = new HttpConfiguration();
// Act
var response = controller.GetUserById(UserId);
// Assert
Assert.IsNotNull(response);
Assert.AreEqual(System.Net.HttpStatusCode.InternalServerError, response.StatusCode);
}