public static async Task TestCancellationAsync(ITestRpcCancellationContract stub)
{
await stub.Delay(TimeSpan.FromMilliseconds(50));
Assert.True(await stub.IsLastDelayFinished());
using (var cts = new CancellationTokenSource())
{
// Note: When the request cancellation notification is issued from client,
// a TaskCancelledException will be thrown immediately regardless of the service handler's state.
// we can check whether the request has really been cancelled by enabling ConsistentResponseSequence.
// TODO implement ability to wait for "request cancelled" response and put it into some OperationCancelledException-derived class
// in JsonRpcClient.
// 1. Issue the request. 500ms should be enough for us to issue a cancellation.
var delayTask = stub.Delay(TimeSpan.FromSeconds(500), cts.Token);
// 2. Issue the cancellation
cts.Cancel();
// 3. Ensures the client-side exception
await Assert.ThrowsAsync <TaskCanceledException>(() => delayTask);
Assert.False(await stub.IsLastDelayFinished());
// Ensures that the stub.Delay request has really been cancelled.
// ReSharper disable once MethodSupportsCancellation
await Task.Delay(500);
Assert.False(await stub.IsLastDelayFinished());
// ReSharper disable once MethodSupportsCancellation
await Task.Delay(500);
Assert.False(await stub.IsLastDelayFinished());
}
}
public static async Task TestCancellationAsync(ITestRpcCancellationContract stub)
{
await stub.Delay(TimeSpan.FromMilliseconds(50));
Assert.True(await stub.IsLastDelayFinished());
using (var cts = new CancellationTokenSource())
{
// Note: When the request cancellation notification is issued from client,
// a TaskCancelledException will be thrown immediately regardless of the service handler's state.
// we can check whether the request has really been cancelled by enabling ConsistentResponseSequence.
// TODO implement ability to wait for "request cancelled" response and put it into some OperationCancelledException-derived class
// in JsonRpcClient.
// 1. Issue the request
var delayTask = stub.Delay(TimeSpan.FromSeconds(3), cts.Token);
// 2. Issue the cancellation
cts.Cancel();
// 3. Ensures the client-side exception
await Assert.ThrowsAsync <TaskCanceledException>(() => delayTask);
var sw = Stopwatch.StartNew();
Assert.False(await stub.IsLastDelayFinished());
sw.Stop();
// Ensures that the stub.Delay request has really been cancelled.
// Normally the execution time of stub.IsLastDelayFinished should definitely be less than 2 sec.
Assert.InRange(sw.ElapsedMilliseconds, 1, 2000);
}
}
