public void TestingLoadingErrorState()
{
// arrange
var signal = new AutoResetEvent(false);
var mockClient = new Mock <IProjectClient>();
mockClient.Setup(c => c.GetUserProjectsAsync()).Throws(new Exception("whoops"));
var vm = new ProjectListViewModel(mockClient.Object);
vm.PropertyChanged += (object sender, PropertyChangedEventArgs e) =>
{
if (e.PropertyName == "Error" && vm.Error)
{
signal.Set();
}
};
// act
vm.LoadProjects();
// assert
if (!signal.WaitOne(TimeSpan.FromMilliseconds(500)))
{
Assert.Fail("timed out waiting for error");
}
}
public void TestBasicLoading()
{
// arrange
var loadingEvents = new List <bool>();
var signal = new AutoResetEvent(false);
var expectedProjects = new List <Project> {
new Project(),
new Project()
};
var mockClient = new Mock <IProjectClient>();
mockClient.Setup(c => c.GetUserProjectsAsync()).Returns(Task.FromResult(expectedProjects));
var vm = new ProjectListViewModel(mockClient.Object);
vm.PropertyChanged += (object sender, PropertyChangedEventArgs e) =>
{
if (e.PropertyName == "Loading")
{
loadingEvents.Add(vm.Loading);
if (loadingEvents.Count > 1)
{
signal.Set();
}
}
};
// act
vm.LoadProjects();
// assert
if (!signal.WaitOne(TimeSpan.FromMilliseconds(500)))
{
Assert.Fail("timed out waiting for projects to load");
}
Assert.IsTrue(new bool[] { true, false }.SequenceEqual(loadingEvents));
Assert.AreEqual(expectedProjects.Count, vm.Projects.Count);
}
public async override void OnDisplay()
{
base.OnDisplay();
await viewModel.LoadProjects();
}