public void HasErrorMessageShouldTriggerWhenProviderBreaks()
{
_provider.DirectAuth("hello", "world").Returns(x => throw new Exception("example"));
var model = BuildDirectAuthViewModel();
model.HasErrorMessage.Should().BeFalse();
model.Username = "******";
model.Password = "******";
model.Login.Execute().Subscribe(ok => { }, error => { });
model.HasErrorMessage.Should().BeTrue();
model.ErrorMessage.Should().Be("example");
}
public DirectAuthViewModel(DirectAuthState state, ICloud provider)
{
this.ValidationRule(
x => x.Username,
name => !string.IsNullOrWhiteSpace(name),
"User name shouldn't be null or white space.");
this.ValidationRule(
x => x.Password,
pass => !string.IsNullOrWhiteSpace(pass),
"Password shouldn't be null or white space.");
Login = ReactiveCommand.CreateFromTask(
() => provider.DirectAuth(Username, Password),
this.IsValid());
_isBusy = Login
.IsExecuting
.ToProperty(this, x => x.IsBusy);
_errorMessage = Login
.ThrownExceptions
.Select(exception => exception.Message)
.Log(this, $"Direct auth error occured in {provider.Name}")
.ToProperty(this, x => x.ErrorMessage);
_hasErrorMessage = Login
.ThrownExceptions
.Select(exception => true)
.Merge(Login.Select(unit => false))
.ToProperty(this, x => x.HasErrorMessage);
Username = state.Username;
Password = state.Password;
this.WhenAnyValue(x => x.Username)
.Subscribe(name => state.Username = name);
this.WhenAnyValue(x => x.Password)
.Subscribe(pass => state.Password = pass);
}