public async Task CatchNotCalledWhenHandledInThenCallback()
{
var othersWereCalled1 = false;
var handlerCalled1 = false;
var catchCalled1 = false;
var othersWereCalled2 = false;
var catchCalled2 = false;
var exception = new InternalTestFailureException();
var promise = new SharpPromise.Promise(resolve => resolve());
var prom = promise.Then(() => { })
.Then(() => { })
.Then((Action)(() => throw exception));
var run1 = prom.Then(() => { }, ex => { handlerCalled1 = true; ex.ShouldBe(exception, "Exceptions were not the same."); })
.Then(() => { othersWereCalled1 = true; })
.Catch(ex => { catchCalled1 = true; });
var run2 = prom.Then(() => { othersWereCalled2 = true; })
.Catch(ex => { catchCalled2 = true; });
await SharpPromise.Promise.All(run1, run2);
othersWereCalled1.ShouldBeTrue("Subsequent \"Then\" calls were not executed after exception was handled.");
handlerCalled1.ShouldBeTrue("Handler was not called after exception.");
catchCalled1.ShouldBeFalse("Catch was still called after exception was handled.");
othersWereCalled2.ShouldBeFalse();
catchCalled2.ShouldBeTrue();
}
public async Task ReturnedValueFromOneThenIsPassedToNextThen()
{
var value = 42;
IPromise promise = new SharpPromise.Promise(resolve =>
{
resolve();
});
await promise.Then(() => value)
.Then(val => val.ShouldBe(value));
}
public async Task ChainedThensExecuteInCorrectOrder()
{
int count = 1;
IPromise promise = new SharpPromise.Promise(resolve =>
{
Thread.Sleep(200);
resolve();
});
await promise.Then(() => count ++.ShouldBe(1))
.Then(() => count++.ShouldBe(2));
}
public async Task IfReturnValueIsAPromiseReturnValueOfThatPromiseIsChained()
{
Action <int> returnedResolver = null;
const int expected = 42;
var returnedPromise = new Promise <int>(resolve => returnedResolver = resolve);
var testedPromise = new SharpPromise.Promise(resolve => resolve());
var resultPromise = testedPromise.Then(() => returnedPromise)
.Then(result => result.ShouldBe(expected));
returnedResolver(expected);
await resultPromise;
}
public async Task ExceptionGetsHandledInThenCallbackFromRejectedTask()
{
var message = "Task failed, but that's what we wanted.";
var ex = new InternalTestFailureException(message);
var testTask = new SharpPromise.Promise(Task.FromException(ex));
await testTask.Then(() =>
{
Assert.Fail("Promise resolved, but should not have.");
},
e =>
{
e.Message.ShouldBe(message, "Exception messages did not match.");
});
}
public async Task CatchDealsWithExceptionFurtherUpTheChain()
{
var othersWereCalled = false;
var exception = new TaskCanceledException();
var promise = new SharpPromise.Promise(resolve => resolve());
await promise.Then(() => { })
.Then(() => { })
.Then((Action)(() => throw exception))
.Then(() => { othersWereCalled = true; })
.Then(() => { othersWereCalled = true; })
.Catch(ex => ex.ShouldBeAssignableTo <TaskCanceledException>());
othersWereCalled.ShouldBeFalse("Then calls after exception should not be called");
}
public async Task ThenFiresAfterResolutionOnAlreadyCompletedPromise()
{
Action resolver = null;
var wasCalled = false;
IPromise promise = new SharpPromise.Promise(resolve => resolver = resolve);
resolver.ShouldNotBeNull();
resolver();
var other = promise.Then(() => wasCalled = true);
await promise;
await other;
wasCalled.ShouldBeTrue();
}