public void AddContact_WhenInvalidObjectPassed_ReturnsBadRequest()
{
var missingAddressContact = new Contact()
{
Name = "PartialContact",
Email = "*****@*****.**",
PhoneNumber = "11109873462",
Dob = new DateTime(1965, 12, 1),
};
_applicationController.ModelState.AddModelError("Address", "Required");
var response = _applicationController.AddContact(missingAddressContact);
Assert.IsType <BadRequestObjectResult>(response);
}