public async Task RunningDifferentTasksDependingOnPreviousResult()
{
var callOrder = new List <string>();
var taskEnd = new ActionTask(Token, () => callOrder.Add("chain completed"))
{
Name = "Chain Completed"
};
var final = taskEnd.Finally((_, __) => { }, TaskAffinity.Concurrent);
var taskStart = new FuncTask <bool>(Token, _ =>
{
callOrder.Add("chain start");
return(false);
})
{
Name = "Chain Start"
}
.Then(new ActionTask <bool>(Token, (_, __) =>
{
callOrder.Add("failing");
throw new InvalidOperationException();
})
{
Name = "Failing"
});
taskStart.Then(new ActionTask(Token, () =>
{
callOrder.Add("on failure");
})
{
Name = "On Failure"
}, runOptions: TaskRunOptions.OnFailure)
.Then(taskEnd, taskIsTopOfChain: true);
taskStart.Then(new ActionTask(Token, () =>
{
callOrder.Add("on success");
})
{
Name = "On Success"
}, runOptions: TaskRunOptions.OnSuccess)
.Then(taskEnd, taskIsTopOfChain: true);
await final.StartAndSwallowException();
Console.WriteLine(String.Join(",", callOrder.ToArray()));
CollectionAssert.AreEqual(new string[] {
"chain start",
"failing",
"on failure",
"chain completed"
}, callOrder);
}
public async Task StartAndEndAreAlwaysRaised()
{
var runOrder = new List <string>();
var task = new ActionTask(Token, _ => { throw new Exception(); });
task.OnStart += _ => runOrder.Add("start");
task.OnEnd += _ => runOrder.Add("end");
await task.Finally((s, d) => { }).StartAndSwallowException();
CollectionAssert.AreEqual(new string[] { "start", "end" }, runOrder);
}
public async Task StartAndEndAreAlwaysRaised()
{
var runOrder = new List <string>();
ITask task = new ActionTask(Token, _ => { throw new Exception(); });
task.OnStart += _ => runOrder.Add("start");
task.OnEnd += (_, __, ___) => runOrder.Add("end");
// we want to run a Finally on a new task (and not in-thread) so that the StartAndSwallowException handler runs after this
// one, proving that the exception is propagated after everything is done
task = task.Finally((_, __) => {}, TaskAffinity.Concurrent);
await task.StartAndSwallowException();
CollectionAssert.AreEqual(new string[] { "start", "end" }, runOrder);
}