public void TrySetFromTask_IfSourceTaskIsSuccessfulAndOfDifferentResultType_SucceedsTaskCompletionSourceAndSetsDefaultValueAsResult()
{
TaskCompletionSource<string> tcs = new TaskCompletionSource<string>();
Task<object> successfulTask = TaskHelpers.FromResult(new object());
tcs.TrySetFromTask(successfulTask);
Assert.Equal(TaskStatus.RanToCompletion, tcs.Task.Status);
Assert.Equal(null, tcs.Task.Result);
}
public void TrySetFromTask_IfSourceTaskIsFaulted_FaultsTaskCompletionSource()
{
TaskCompletionSource<string> tcs = new TaskCompletionSource<string>();
Exception exception = new Exception();
Task faultedTask = TaskHelpers.FromError<object>(exception);
tcs.TrySetFromTask(faultedTask);
Assert.Equal(TaskStatus.Faulted, tcs.Task.Status);
Assert.Same(exception, tcs.Task.Exception.InnerException);
}
public void TrySetFromTask_IfSourceTaskIsSuccessfulAndOfSameResultType_SucceedsTaskCompletionSourceAndSetsResult()
{
TaskCompletionSource<string> tcs = new TaskCompletionSource<string>();
Task<string> successfulTask = TaskHelpers.FromResult("abc");
tcs.TrySetFromTask(successfulTask);
Assert.Equal(TaskStatus.RanToCompletion, tcs.Task.Status);
Assert.Equal("abc", tcs.Task.Result);
}
public void TrySetFromTask_IfSourceTaskIsCanceled_CancelsTaskCompletionSource()
{
TaskCompletionSource<string> tcs = new TaskCompletionSource<string>();
Task canceledTask = TaskHelpers.Canceled<object>();
tcs.TrySetFromTask(canceledTask);
Assert.Equal(TaskStatus.Canceled, tcs.Task.Status);
}
public INavigationOperation TryShowAsync(IViewModel viewModel, IDataContext context,
IViewModelPresenter parentPresenter)
{
if (!CanShowViewModel(viewModel, context, parentPresenter))
return null;
var tcs = new TaskCompletionSource<object>();
var operation = new NavigationOperation(tcs.Task);
context = context.ToNonReadOnly();
context.AddOrUpdate(NavigationConstants.ViewModel, viewModel);
var provider = viewModel.GetIocContainer(true).Get<INavigationProvider>();
provider.CurrentNavigationTask.TryExecuteSynchronously(_ =>
{
try
{
var task = provider.NavigateAsync(operation.ToOperationCallback(), context);
tcs.TrySetFromTask(task);
}
catch (Exception e)
{
tcs.TrySetException(e);
throw;
}
});
return operation;
}
private void Show(IWindowViewMediator viewMediator, INavigationOperation operation, IDataContext context, TaskCompletionSource<object> tcs)
{
try
{
var task = viewMediator.ShowAsync(operation.ToOperationCallback(), context);
_currentTask = task;
tcs.TrySetFromTask(task);
}
catch (Exception e)
{
tcs.TrySetException(e);
throw;
}
}
public void FromToast(IToast toast)
{
_toast = toast;
_tcs.TrySetFromTask(toast.CompletionTask);
}
public static bool TrySetFromTask <TResult>(this TaskCompletionSource <TResult> resultSetter, Task <TResult> task)
{
return(resultSetter.TrySetFromTask(task));
}
