public void RunOnUIThreadDelayedAsync_should_throw_on_null_arguments()
{
var dispatcher = new ThreadDispatcher(_ => Task.CompletedTask);
Func <Task> func = async() => await dispatcher.RunOnUIThreadDelayedAsync(null, 0);
func.Should().ThrowExactly <ArgumentNullException>().And.ParamName.Should().Be("action");
}
public async Task RunOnUIThreadDelayedAsync_should_run_after_a_delay()
{
bool ranOnUIThread = false;
bool ranDelayed = false;
bool ranAction = false;
var dispatcher = new ThreadDispatcher(
uiThreadInvoker: action =>
{
ranOnUIThread = true;
action();
return(Task.CompletedTask);
},
delayInvoker: (ms, token) =>
{
ranDelayed = true;
return(Task.CompletedTask);
});
await dispatcher.RunOnUIThreadDelayedAsync(() => ranAction = true, 0);
ranOnUIThread.Should().BeTrue();
ranDelayed.Should().BeTrue();
ranAction.Should().BeTrue();
}
public async Task RunOnUIThreadDelayedAsync_should_not_run_if_canceled_before_the_delay_timeout()
{
var dispatcher = new ThreadDispatcher(_ => Task.CompletedTask);
var cancellationSource = new CancellationTokenSource();
bool actionRan = false;
Task task = dispatcher.RunOnUIThreadDelayedAsync(
() => actionRan = true,
-1,
cancellationSource.Token);
cancellationSource.Cancel();
await task;
actionRan.Should().BeFalse();
}