public async Task CreateAsync_Should_Add_User_CorrectlyAsync(string username, string email, string password,
PasswordHashSalt passwordHashSalt, string apiKey)
{
var user = default(UserModel);
_apiKeyGenerator.GenerateNewApiKey().Returns(apiKey);
_userRepository.IsUsernameExistAsync(username).Returns(false);
_userRepository.IsEmailExistAsync(email).Returns(false);
_passwordManager.GeneratePassword(password).Returns(passwordHashSalt);
_userRepository.When(x => x.AddUserAsync(Arg.Any <UserModel>())).Do(x => user = (UserModel)x[0]);
await _userServiceInstance.CreateAsync(username, password, email);
Assert.IsNotNull(user);
Assert.AreEqual(username, user.Username);
Assert.AreEqual(email, user.Email);
Assert.AreEqual(passwordHashSalt.PasswordHash, user.PasswordHash);
Assert.AreEqual(passwordHashSalt.Salt, user.Salt);
Assert.That(DateTime.UtcNow, Is.EqualTo(user.Created).Within(1).Seconds);
Assert.That(DateTime.UtcNow, Is.EqualTo(user.Updated).Within(1).Seconds);
Assert.AreEqual(apiKey, user.ApiKey);
}