public void PrepareForRethrow_PreservesStackTrace()
{
string originalStackTrace = null;
try
{
Exception preservedException = null;
try
{
ThrowNotImplementedException();
}
catch (NotImplementedException ex)
{
originalStackTrace = ex.StackTrace;
preservedException = ex;
}
throw ExceptionHelpers.PrepareForRethrow(preservedException);
}
catch (NotImplementedException ex)
{
Assert.IsTrue(ex.StackTrace.StartsWith(originalStackTrace));
return;
}
}
/// <summary>
/// Waits for the task to complete, unwrapping any exceptions.
/// </summary>
/// <param name="task">The task. May not be <c>null</c>.</param>
/// <param name="cancellationToken">A cancellation token to observe while waiting for the task to complete.</param>
/// <exception cref="OperationCanceledException">The <paramref name="cancellationToken"/> was cancelled before the <paramref name="task"/> completed, or the <paramref name="task"/> raised an <see cref="OperationCanceledException"/>.</exception>
public static void WaitAndUnwrapException(this Task task, CancellationToken cancellationToken)
{
try {
task.Wait(cancellationToken);
} catch (AggregateException ex) {
throw ExceptionHelpers.PrepareForRethrow(ex.InnerException);
}
}
/// <summary>
/// Waits for the task to complete, unwrapping any exceptions.
/// </summary>
/// <typeparam name="TResult">The type of the result of the task.</typeparam>
/// <param name="task">The task. May not be <c>null</c>.</param>
/// <param name="cancellationToken">A cancellation token to observe while waiting for the task to complete.</param>
/// <returns>The result of the task.</returns>
/// <exception cref="OperationCanceledException">The <paramref name="cancellationToken"/> was cancelled before the <paramref name="task"/> completed, or the <paramref name="task"/> raised an <see cref="OperationCanceledException"/>.</exception>
public static TResult WaitAndUnwrapException <TResult>(this Task <TResult> task, CancellationToken cancellationToken)
{
try {
task.Wait(cancellationToken);
return(task.Result);
} catch (AggregateException ex) {
throw ExceptionHelpers.PrepareForRethrow(ex.InnerException);
}
}
/// <summary>
/// Waits for the task to complete, unwrapping any exceptions.
/// </summary>
/// <param name="task">The task. May not be <c>null</c>.</param>
/// <param name="cancellationToken">A cancellation token to observe while waiting for the task to complete.</param>
/// <exception cref="OperationCanceledException">The <paramref name="cancellationToken"/> was cancelled before the <paramref name="task"/> completed, or the <paramref name="task"/> raised an <see cref="OperationCanceledException"/>.</exception>
public static void WaitAndUnwrapException(this Task task, CancellationToken cancellationToken)
{
if (task == null)
{
throw new ArgumentNullException(nameof(task));
}
try
{
task.Wait(cancellationToken);
}
catch (AggregateException ex)
{
throw ExceptionHelpers.PrepareForRethrow(ex.InnerException);
}
}
/// <summary>
/// Waits for the task to complete, unwrapping any exceptions.
/// </summary>
/// <typeparam name="TResult">The type of the result of the task.</typeparam>
/// <param name="task">The task. May not be <c>null</c>.</param>
/// <param name="cancellationToken">A cancellation token to observe while waiting for the task to complete.</param>
/// <returns>The result of the task.</returns>
/// <exception cref="OperationCanceledException">The <paramref name="cancellationToken"/> was cancelled before the <paramref name="task"/> completed, or the <paramref name="task"/> raised an <see cref="OperationCanceledException"/>.</exception>
public static TResult WaitAndUnwrapException <TResult>(this Task <TResult> task, CancellationToken cancellationToken)
{
if (task is null)
{
throw new ArgumentNullException(nameof(task));
}
try
{
task.Wait(cancellationToken);
return(task.Result);
}
catch (AggregateException ex)
{
throw ExceptionHelpers.PrepareForRethrow(ex.InnerException);
}
}
