public void SignUp_InvalidRequest_RespondsWithValidationErrors()
{
var request = new TeacherTrainingAdviserSignUp {
Email = "invalid-email@"
};
_controller.ModelState.AddModelError("Email", "Email is invalid.");
var response = _controller.SignUp(request);
var badRequest = response.Should().BeOfType <BadRequestObjectResult>().Subject;
var errors = badRequest.Value.Should().BeOfType <SerializableError>().Subject;
errors.Should().ContainKey("Email").WhichValue.Should().BeOfType <string[]>().Which.Should().Contain("Email is invalid.");
}
