示例#1
0
        public void AssignCommandToButton()
        {
            CommandProvider.OnClickCount = 0;
            TestViewModel viewModel = new TestViewModel();
            using(var button = new Button()) {
                button.SetCommand(viewModel.TestCommand);
                Assert.That(viewModel.TestCommandExecuteCount, Is.EqualTo(0));

                button.PerformClick();
                Assert.That(viewModel.TestCommandExecuteCount, Is.EqualTo(1));
                Assert.That(viewModel.ExecuteParameter, Is.Null);
                Assert.That(viewModel.CanExecuteParameter, Is.Null);
                Assert.That(CommandProvider.OnClickCount, Is.EqualTo(1));

                button.SetCommand(null);
                button.PerformClick();
                Assert.That(viewModel.TestCommandExecuteCount, Is.EqualTo(1));
                Assert.That(CommandProvider.OnClickCount, Is.EqualTo(1));

                viewModel.CanExecuteTestCommand = false;
                button.SetCommand(viewModel.TestCommand);
                button.PerformClick();
                Assert.That(viewModel.TestCommandExecuteCount, Is.EqualTo(1));
                Assert.That(CommandProvider.OnClickCount, Is.EqualTo(1));

                viewModel.CanExecuteTestCommand = true;
                button.SetCommandParameter("param");
                button.PerformClick();
                Assert.That(viewModel.TestCommandExecuteCount, Is.EqualTo(2));
                Assert.That(viewModel.ExecuteParameter, Is.EqualTo("param"));
                Assert.That(viewModel.CanExecuteParameter, Is.EqualTo("param"));
                Assert.That(CommandProvider.OnClickCount, Is.EqualTo(2));
            }
        }
示例#2
0
 public void UpdateIsEnabledOnCanExecuteChanged()
 {
     bool canExecute = true;
     bool executed = false;
     var command = new DelegateCommand<string>(o => executed = true, o => canExecute);
     using(var button = new Button()) {
         button.SetCommand(command);
         Assert.That(button.Enabled, Is.True);
         canExecute = false;
         Assert.That(button.Enabled, Is.True);
         button.PerformClick();
         Assert.That(executed, Is.False);
         Assert.That(button.Enabled, Is.True);
         TestUtils.GarbageCollect();
         command.RaiseCanExecuteChanged();
         Assert.That(button.Enabled, Is.False);
         Assert.That(command.CanExecuteChangedSubscribeCount, Is.EqualTo(1));
         WeakReference handlerRef = GetHandlerRef(button);
         button.SetCommand(null);
         Assert.That(command.CanExecuteChangedSubscribeCount, Is.EqualTo(0));
         TestUtils.GarbageCollect();
         Assert.That(handlerRef.IsAlive, Is.False);
     }
 }
示例#3
0
 WeakReference CreateButtonAndAssignCommand(ICommand command)
 {
     var button = new Button();
     button.SetCommand(command);
     return new WeakReference(button);
 }
示例#4
0
 public void UpdateIsEnabledOnSetParameter()
 {
     var command = new DelegateCommand<string>(o => { }, o => string.IsNullOrEmpty(o));
     using(var button = new Button()) {
         button.SetCommand(command);
         Assert.That(button.Enabled, Is.True);
         button.SetCommandParameter("x");
         Assert.That(button.Enabled, Is.False);
         button.SetCommandParameter(null);
         Assert.That(button.Enabled, Is.True);
         button.SetCommandParameter("x");
         Assert.That(button.Enabled, Is.False);
         button.SetCommand(null);
         Assert.That(button.Enabled, Is.True);
         button.SetCommand(command);
         Assert.That(button.Enabled, Is.False);
     }
 }