System.Waf.Applications.AsyncDelegateCommand.RaiseCanExecuteChanged C# (CSharp) Method

        public void RaiseCanExecuteChanged()
        {
            OnCanExecuteChanged(EventArgs.Empty);
        }

        public void RaiseCanExecuteChangedTest()
        {
            var executed = false;
            var canExecute = false;
            var command = new AsyncDelegateCommand(() => { executed = true; return Task.FromResult((object)null); }, () => canExecute);

            Assert.IsFalse(command.CanExecute(null));
            canExecute = true;
            Assert.IsTrue(command.CanExecute(null));

            AssertHelper.CanExecuteChangedEvent(command, () => command.RaiseCanExecuteChanged());

            AssertHelper.CanExecuteChangedEvent(command, () => command.Execute(null), 2, ExpectedChangedCountMode.Exact);  // Because during execution CanExecute returns false
            Assert.IsTrue(executed);
        }