public async Task SuccessTest()
{
var tcg = new TaskContinuationGenerator <TaskContinuationGeneratorTests, TaskContinuationGeneratorTests, Task>();
var cTask = tcg.SetContinuation(this, GetPreviousTask(), null, CallTargetState.GetDefault());
await cTask;
async Task GetPreviousTask()
{
await Task.Delay(1000).ConfigureAwait(false);
}
}
public async Task CancelledTest()
{
// Normal
var task = GetPreviousTask();
await Assert.ThrowsAsync <CustomCancellationException>(() => task);
Assert.Equal(TaskStatus.Canceled, task.Status);
// Using the continuation
var tcg = new TaskContinuationGenerator <TaskContinuationGeneratorTests, TaskContinuationGeneratorTests, Task>();
task = tcg.SetContinuation(this, GetPreviousTask(), null, CallTargetState.GetDefault());
await Assert.ThrowsAsync <CustomCancellationException>(() => task);
Assert.Equal(TaskStatus.Canceled, task.Status);
public async Task ExceptionGenericTest()
{
Exception ex = null;
// Normal
ex = await Assert.ThrowsAsync <CustomException>(() => GetPreviousTask());
Assert.Equal("Internal Test Exception", ex.Message);
// Using the continuation
var tcg = new TaskContinuationGenerator <TaskContinuationGeneratorTests, TaskContinuationGeneratorTests, Task <bool>, bool>();
ex = await Assert.ThrowsAsync <CustomException>(() => tcg.SetContinuation(this, GetPreviousTask(), null, CallTargetState.GetDefault()));
Assert.Equal("Internal Test Exception", ex.Message);
async Task <bool> GetPreviousTask()
{
await Task.Delay(1000).ConfigureAwait(false);
throw new CustomException("Internal Test Exception");
}
}
/// <summary>
/// Adds a continuation based on the current returnValue
/// </summary>
/// <typeparam name="TState">Type of the state</typeparam>
/// <param name="returnValue">Return value</param>
/// <param name="ex">Exception</param>
/// <param name="state">State value</param>
/// <param name="continuation">Continuation delegate</param>
/// <param name="generator">Continuation generator</param>
/// <returns>Return value after the continuation</returns>
public static object AddContinuation <TState>(object returnValue, Exception ex, TState state, Func <object, Exception, TState, Task <object> > continuation, TaskContinuationGenerator generator = null)
{
if (returnValue is Task returnTask && ex is null)
{
generator ??= GetContinuationFrom(returnTask.GetType());
return(generator.SetTaskContinuationAsync(returnTask, state, continuation));
}
SynchronizationContext currentContext = SynchronizationContext.Current;
try
{
SynchronizationContext.SetSynchronizationContext(null);
return(continuation(returnValue, ex, state).GetAwaiter().GetResult());
}
finally
{
SynchronizationContext.SetSynchronizationContext(currentContext);
}
}
/// <summary>
/// Adds a continuation based on the current returnValue
/// </summary>
/// <typeparam name="TState">Type of the state</typeparam>
/// <param name="returnValue">Return value</param>
/// <param name="ex">Exception</param>
/// <param name="state">State value</param>
/// <param name="continuation">Continuation delegate</param>
/// <param name="generator">Continuation generator</param>
/// <returns>Return value after the continuation</returns>
public static object AddContinuation <TState>(object returnValue, Exception ex, TState state, Func <object, Exception, TState, object> continuation, TaskContinuationGenerator generator = null)
{
if (returnValue is Task returnTask && ex is null)
{
generator ??= GetContinuationFrom(returnTask.GetType());
return(generator.SetTaskContinuation(returnTask, state, continuation));
}
return(continuation(returnValue, ex, state));
}