C# (CSharp) Jedzia.BackBock.ViewModel.Commands RelayCommand.RaiseCanExecuteChanged Examples

Example #1

File: RelayCommandTest.cs Project: Jedzia/BackBock

        public void TestCanExecuteChanged()
        {
            var command = new RelayCommand((e) =>
            {
            },
                                           (e) => true);

            var canExecuteChangedCalled = 0;

            var canExecuteChangedEventHandler = new EventHandler((s, e) => canExecuteChangedCalled++);

            command.CanExecuteChanged += canExecuteChangedEventHandler;

            command.RaiseCanExecuteChanged();

            Assert.AreEqual(1, canExecuteChangedCalled);

            command.CanExecuteChanged -= canExecuteChangedEventHandler;
            command.RaiseCanExecuteChanged();

            Assert.AreEqual(1, canExecuteChangedCalled);
        }