public void AsyncTaskBodyThrowsException()
{
int state = 0;
var tcs = new TaskCompletionSource <int>();
Task task = tcs.Task;
var ex = new Exception("Some text");
Func <Task> someMethod = async() => {
state = 1;
await task;
state = 2;
throw ex;
};
Task asyncTask = someMethod();
Assert.AreEqual(asyncTask.Status, TaskStatus.Running, "asyncTask should be running immediately");
Assert.AreEqual(state, 1, "Async method should start running after being invoked");
Window.SetTimeout(() => {
Assert.AreEqual(asyncTask.Status, TaskStatus.Running, "asyncTask should be running before awaited task is finished");
Assert.AreEqual(state, 1, "Async method should not continue past point 1 until task is finished");
}, 100);
Window.SetTimeout(() => {
tcs.SetResult(0);
}, 200);
Window.SetTimeout(() => {
Assert.AreEqual(asyncTask.Status, TaskStatus.Faulted, "asyncTask should fault");
Assert.IsTrue(asyncTask.Exception != null, "asyncTask should have an exception");
Assert.IsTrue(asyncTask.Exception.InnerExceptions[0] == ex, "asyncTask should throw the correct exception");
Assert.AreEqual(state, 2, "Async method should finish after the task is finished");
QUnit.Start();
}, 300);
}
public void AsyncVoid()
{
int state = 0;
var tcs = new TaskCompletionSource <int>();
Task task = tcs.Task;
Action someMethod = async() => {
state = 1;
await task;
state = 2;
};
someMethod();
Assert.AreEqual(state, 1, "Async method should start running after being invoked");
Window.SetTimeout(() => {
Assert.AreEqual(state, 1, "Async method should not continue past point 1 until task is finished");
}, 100);
Window.SetTimeout(() => {
tcs.SetResult(0);
}, 200);
Window.SetTimeout(() => {
Assert.AreEqual(state, 2, "Async method should finish after the task is finished");
QUnit.Start();
}, 300);
}
public void AsyncTask()
{
int state = 0;
var tcs = new TaskCompletionSource <int>();
Task task = tcs.Task;
Func <Task> someMethod = async() => {
state = 1;
await task;
state = 2;
};
Task asyncTask = someMethod();
Assert.AreEqual(asyncTask.Status, TaskStatus.Running, "asyncTask should be running immediately");
Assert.AreEqual(state, 1, "Async method should start running after being invoked");
Window.SetTimeout(() => {
Assert.AreEqual(asyncTask.Status, TaskStatus.Running, "asyncTask should be running before awaited task is finished");
Assert.AreEqual(state, 1, "Async method should not continue past point 1 until task is finished");
}, 100);
Window.SetTimeout(() => {
tcs.SetResult(0);
}, 200);
Window.SetTimeout(() => {
Assert.AreEqual(asyncTask.Status, TaskStatus.RanToCompletion, "asyncTask should run to completion");
Assert.IsTrue(asyncTask.Exception == null, "asyncTask should not throw an exception");
Assert.AreEqual(state, 2, "Async method should finish after the task is finished");
QUnit.Start();
}, 300);
}
public void TaskFromPromiseWithoutResultFactoryWorksWhenPromiseCompletes()
{
var promise = CreatePromise();
var task = Task.FromPromise(promise);
Assert.AreEqual(task.Status, TaskStatus.Running, "Task should be running after being created");
bool continuationRun = false;
task.ContinueWith(t => {
Assert.IsTrue(t == task, "ContinueWith parameter should be correct");
continuationRun = true;
});
Window.SetTimeout(() => {
Assert.IsFalse(continuationRun, "Continuation should not be run too early.");
Assert.AreEqual(task.Status, TaskStatus.Running, "Task should be running before promise is completed.");
promise.Resolve(42, "result 123", 101);
}, 100);
Window.SetTimeout(() => {
Assert.AreEqual(task.Status, TaskStatus.RanToCompletion, "Task should be completed after promise");
Assert.IsTrue(continuationRun, "Continuation should have been run after promise was completed.");
Assert.AreEqual(task.Result, new object[] { 42, "result 123", 101 }, "The result should be correct");
QUnit.Start();
}, 200);
}
public async void FailingPromiseCanBeAwaited()
{
var promise = CreatePromise();
bool continuationRun = false;
Window.SetTimeout(() => {
Assert.IsFalse(continuationRun, "Continuation should not be run too early.");
promise.Reject(42, "result 123", 101);
}, 100);
Window.SetTimeout(() => {
Assert.IsTrue(continuationRun, "Continuation should have been run after promise was rejected.");
QUnit.Start();
}, 200);
try {
await promise;
Assert.IsTrue(false, "Await should throw");
}
catch (AggregateException ex) {
Assert.AreEqual(ex.InnerExceptions.Length, 1, "Exception should have one inner exception");
Assert.IsTrue(ex.InnerExceptions[0] is PromiseException, "Inner exception should be a PromiseException");
Assert.AreEqual(((PromiseException)ex.InnerExceptions[0]).Arguments, new object[] { 42, "result 123", 101 }, "The PromiseException arguments should be correct");
}
catch (Exception ex) {
Assert.IsTrue(false, "Thrown exception should have been an AggregateException, was " + ex.GetType().FullName);
}
continuationRun = true;
}
public void TaskFromPromiseWorksWhenPromiseFails()
{
var promise = CreatePromise();
var task = Task.FromPromise(promise);
Assert.AreEqual(task.Status, TaskStatus.Running, "Task should be running after being created");
bool continuationRun = false;
task.ContinueWith(t => {
Assert.IsTrue(t == task, "ContinueWith parameter should be correct");
continuationRun = true;
});
Window.SetTimeout(() => {
Assert.IsFalse(continuationRun, "Continuation should not be run too early.");
Assert.AreEqual(task.Status, TaskStatus.Running, "Task should be running before promise is completed.");
promise.Reject(42, "result 123", 101);
}, 100);
Window.SetTimeout(() => {
Assert.AreEqual(task.Status, TaskStatus.Faulted, "Task should have faulted after the promise was rejected.");
Assert.IsTrue(continuationRun, "Continuation should have been run after promise was rejected.");
Assert.IsTrue((object)task.Exception is AggregateException, "Exception should be an AggregateException");
Assert.AreEqual(task.Exception.InnerExceptions.Length, 1, "Exception should have one inner exception");
Assert.IsTrue(task.Exception.InnerExceptions[0] is PromiseException, "Inner exception should be a PromiseException");
Assert.AreEqual(((PromiseException)task.Exception.InnerExceptions[0]).Arguments, new object[] { 42, "result 123", 101 }, "The PromiseException arguments should be correct");
QUnit.Start();
}, 200);
}
public async void CompletingPromiseCanBeAwaited()
{
var promise = CreatePromise();
object[] result = null;
Window.SetTimeout(() => {
Assert.IsTrue(result == null, "Await should not finish too early.");
promise.Resolve(42, "result 123", 101);
}, 100);
Window.SetTimeout(() => {
Assert.AreEqual(result, new object[] { 42, "result 123", 101 }, "The result should be correct");
QUnit.Start();
}, 200);
result = await promise;
}
public void TaskFromPromiseWithResultIndexWorksWhenPromiseCompletes()
{
var promise = CreatePromise();
var tasks = new Task <int>[] {
Task.FromPromise <int>(promise, 0),
Task.FromPromise <int>(promise, 1),
Task.FromPromise <int>(promise, 2),
Task.FromPromise <int>(promise, -3),
Task.FromPromise <int>(promise, -2),
Task.FromPromise <int>(promise, -1),
};
var continuationsRun = new bool[6];
Assert.IsTrue(tasks.Every(t => t.Status == TaskStatus.Running), "Tasks should be running after being created");
tasks.ForEach((x, i, _) => x.ContinueWith(t => {
Assert.IsTrue(t == x, "ContinueWith parameter should be correct");
continuationsRun[i] = true;
}));
Window.SetTimeout(() => {
Assert.IsFalse(continuationsRun.Some(x => x), "Continuations should not be run too early.");
Assert.IsTrue(tasks.Every(t => t.Status == TaskStatus.Running), "Tasks should be running before promise is completed.");
promise.Resolve(10, 42, 38);
}, 100);
Window.SetTimeout(() => {
Assert.IsTrue(tasks.Every(t => t.Status == TaskStatus.RanToCompletion), "Task should be completed after promise");
Assert.IsTrue(continuationsRun.Every(x => x), "Continuations should have been run after promise was completed.");
Assert.AreEqual(tasks[0].Result, 10, "Task 0 result should be correct");
Assert.AreEqual(tasks[1].Result, 42, "Task 1 result should be correct");
Assert.AreEqual(tasks[2].Result, 38, "Task 2 result should be correct");
Assert.AreEqual(tasks[3].Result, 10, "Task 3 result should be correct");
Assert.AreEqual(tasks[4].Result, 42, "Task 4 result should be correct");
Assert.AreEqual(tasks[5].Result, 38, "Task 5 result should be correct");
QUnit.Start();
}, 200);
}
