/// <summary>
/// Asserts that the current <see cref="Delegate"/> stops throwing any exception
/// after a specified amount of time.
/// </summary>
/// <remarks>
/// The delegate is invoked. If it raises an exception,
/// the invocation is repeated until it either stops raising any exceptions
/// or the specified wait time is exceeded.
/// </remarks>
/// <param name="waitTime">
/// The time after which the delegate should have stopped throwing any exception.
/// </param>
/// <param name="pollInterval">
/// The time between subsequent invocations of the delegate.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
/// <exception cref="ArgumentOutOfRangeException">Throws if waitTime or pollInterval are negative.</exception>
public void NotThrowAfter(TimeSpan waitTime, TimeSpan pollInterval, string because = "", params object[] becauseArgs)
{
FailIfSubjectIsAsyncVoid();
if (waitTime < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(waitTime), $"The value of {nameof(waitTime)} must be non-negative.");
}
if (pollInterval < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(pollInterval), $"The value of {nameof(pollInterval)} must be non-negative.");
}
TimeSpan? invocationEndTime = null;
Exception exception = null;
var timer = clock.StartTimer();
while (invocationEndTime is null || invocationEndTime < waitTime)
{
exception = InvokeSubjectWithInterception();
if (exception is null)
{
return;
}
clock.Delay(pollInterval);
invocationEndTime = timer.Elapsed;
}
Execute.Assertion
.BecauseOf(because, becauseArgs)
.FailWith("Did not expect any exceptions after {0}{reason}, but found {1}.", waitTime, exception);
}
public static async Task ScheduleAsync(
this IClock clock, TimeSpan span, Func <Task> f,
CancellationToken cancellationToken)
{
await clock.Delay(span, cancellationToken).ConfigureAwait(false);
await f().ConfigureAwait(false);
}
public static async Task <TResult> ScheduleAsync <TResult>(
this IClock clock, TimeSpan span, Func <Task <TResult> > f,
CancellationToken cancellationToken)
{
await clock.Delay(span, cancellationToken).ConfigureAwait(false);
return(await f().ConfigureAwait(false));
}
public static async Task DelayTo(this IClock clock, DateTime delayTo, CancellationToken cancellationToken)
{
var span = clock.TimeTo(delayTo);
if (span > TimeSpan.Zero)
{
await clock.Delay(span, cancellationToken).ConfigureAwait(false);
}
}
private async Task <T> WithTimeout <T>(Task <T> mainTask, int timeout, CancellationTokenSource source)
{
Task timeoutTask = clock.Delay(timeout, source.Token);
Task result = await Task.WhenAny(mainTask, timeoutTask);
if (result.Equals(mainTask))
{
return(mainTask.Result);
}
throw new TimeoutException();
}
public static async Task <Server> GetLastServer(string path, IClock clock, CancellationTokenSource source)
{
try
{
return(await GetLastServerInternal(path));
}
catch (IOException)
{
await clock.Delay(1000, source.Token);
return(await GetLastServerInternal(path));
}
}
/// <summary>
/// Asserts that the current <see cref="Func{T}"/> stops throwing any exception
/// after a specified amount of time.
/// </summary>
/// <remarks>
/// The <see cref="Func{T}"/> is invoked. If it raises an exception,
/// the invocation is repeated until it either stops raising any exceptions
/// or the specified wait time is exceeded.
/// </remarks>
/// <param name="waitTime">
/// The time after which the <see cref="Func{T}"/> should have stopped throwing any exception.
/// </param>
/// <param name="pollInterval">
/// The time between subsequent invocations of the <see cref="Func{T}"/>.
/// </param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <see cref="because" />.
/// </param>
/// <exception cref="ArgumentOutOfRangeException">Throws if waitTime or pollInterval are negative.</exception>
public new AndWhichConstraint <FunctionAssertions <T>, T> NotThrowAfter(TimeSpan waitTime, TimeSpan pollInterval, string because = "", params object[] becauseArgs)
{
if (waitTime < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(waitTime), $"The value of {nameof(waitTime)} must be non-negative.");
}
if (pollInterval < TimeSpan.Zero)
{
throw new ArgumentOutOfRangeException(nameof(pollInterval), $"The value of {nameof(pollInterval)} must be non-negative.");
}
Execute.Assertion
.ForCondition(!ReferenceEquals(Subject, null))
.BecauseOf(because, becauseArgs)
.FailWith("Expected {context} not to throw any exceptions after {0}{reason}, but found <null>.", waitTime);
TimeSpan? invocationEndTime = null;
Exception exception = null;
ITimer timer = clock.StartTimer();
while (invocationEndTime is null || invocationEndTime < waitTime)
{
try
{
T result = Subject();
return(new AndWhichConstraint <FunctionAssertions <T>, T>(this, result));
}
catch (Exception e)
{
exception = e;
}
clock.Delay(pollInterval);
invocationEndTime = timer.Elapsed;
}
Execute.Assertion
.BecauseOf(because, becauseArgs)
.FailWith("Did not expect any exceptions after {0}{reason}, but found {1}.", waitTime, exception);
return(new AndWhichConstraint <FunctionAssertions <T>, T>(this, default(T)));
}