public void AsyncMethodCallbackTest()
{
bool methodCalled = false;
// setup method
Func<int, int> method = n =>
{
methodCalled = true;
return -1;
};
// setup test instance
var asyncSample = new AsyncBench(
20, method);
IAsyncResult ar = method.BeginInvoke(20, null, new State {Field = 10});
// wait for the method to complete
ar.AsyncWaitHandle.WaitOne();
// verify it has completed
Assert.IsTrue(ar.IsCompleted, "Operation should have completed before reaching this point!");
// and was really called
Assert.IsTrue(methodCalled, "Test method should have been called, but it was not!");
// use IAsyncResult from our own BeginInvoke for the callback on the test instance
asyncSample.AsyncMethodCallback(ar);
// check that EndInvoke worked as expected
Assert.AreEqual(-1, asyncSample.Param);
}
