public void When_invoked_then_method_is_called()
{
var vm = new MockViewModelWithAction();
var invoker = new ExpressionInvoker<string>(p => vm.Action(p));
invoker.Invoke("Foo");
Assert.IsTrue(vm.ActionCalled);
}
public void Source_Is_Disabled_When_Target_Command_Gets_Disabled_After_Initialization_With_Expression()
{
var source = new MockEventSource();
var target = new MockViewModelWithAction() { IsActionEnabled = true };
var binder = new MethodBinder<MockEventArgs>(source, "MockEvent", e => target.Action(), p => target.IsActionEnabled,target);
binder.Bind();
target.IsActionEnabled = false;
Assert.IsFalse(source.IsEnabled);
}
public void MethodBinder_Doesnt_Support_Parameters_On_Actions()
{
var target = new MockViewModelWithAction();
AssertExt.ExpectException<NotSupportedException>(() =>
{
var binder = new MethodBinder<MockEventArgs>(new UserControl(), "MockEvent", e => target.Action("will fail"));
});
}
public void When_method_binder_is_added_then_it_can_be_retrieved_by_its_event()
{
var button = new Button();
var view = new UserControl();
var vm = new MockViewModelWithAction();
var buttonBinder = new MethodBinder<RoutedEventArgs>(button, "Click", p => vm.Action());
var viewModelBinder = new ViewBinder<object>(view, vm);
viewModelBinder.Add(buttonBinder);
var binder = viewModelBinder.GetMethodBinder(button, "Click");
Assert.AreEqual(buttonBinder, binder);
}
public void When_two_identical_method_actions_are_compared_then_they_match()
{
var vm = new MockViewModelWithAction();
Expression<Action<RoutedEventArgs>> action1 = p => vm.Action();
Expression<Action<RoutedEventArgs>> action2 = p => vm.Action();
Assert.IsTrue(action1.ExpressionEquals(action2));
}
public void When_two_different_method_actions_are_compared_then_they_do_not_match()
{
var vm = new MockViewModelWithAction();
Expression<Action<RoutedEventArgs>> action1 = p => vm.Action();
Expression<Action<RoutedEventArgs>> action2 = p => DummyAction();
Assert.IsFalse(action1.ExpressionEquals(action2));
}