public void BindCommandToObjectTargetIsNull()
{
var vm = new CommandBindingViewModel();
var view = new CommandBindingView {
ViewModel = vm
};
var invokeCount = 0;
vm.Command2.Subscribe(_ => invokeCount++);
var sub = new Subject <object>();
Assert.Throws <Exception>(() =>
{
var disp = CreatesCommandBinding.BindCommandToObject(vm.Command2, true, sub);
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
disp.Dispose();
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
});
Assert.Equal(0, invokeCount);
}
public void CommandBindToExplicitEventWireup()
{
var vm = new CommandBindingViewModel();
var view = new CommandBindingView {
ViewModel = vm
};
var invokeCount = 0;
vm.Command2.Subscribe(_ => invokeCount++);
var disp = view.BindCommand(vm, x => x.Command2, x => x.Command2, "MouseUp");
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
disp.Dispose();
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
Assert.Equal(1, invokeCount);
}
public void BindCommandToObjectWithEventCommandIsArgumentNull()
{
var vm = new CommandBindingViewModel();
var view = new CommandBindingView {
ViewModel = vm
};
var invokeCount = 0;
vm.Command2.Subscribe(_ => invokeCount++);
var btn = new Button();
var cmd = (btn as ICommand) !;
var sub = new Subject <object>();
Assert.Throws <TargetInvocationException>(() =>
{
var disp = CreatesCommandBinding.BindCommandToObject(cmd, view, sub, "PropertyChanged");
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
disp.Dispose();
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
});
Assert.Equal(0, invokeCount);
}
static (IDisposable, WeakReference) GetWeakReference()
{
var vm = new CommandBindingViewModel();
var view = new CommandBindingView {
ViewModel = vm
};
var weakRef = new WeakReference(vm);
var disp = view.BindCommand(vm, x => x.Command2, x => x.Command2, "MouseUp");
view.ViewModel = new CommandBindingViewModel();
return(disp, weakRef);
}
public void CommandBindViewModelToViewWithFunc()
{
var vm = new CommandBindingViewModel();
var view = new CommandBindingView {
ViewModel = vm
};
// Create a paramenter feed
vm.Command2.Subscribe(_ =>
{
vm.Value++;
});
view.BindCommand(vm, x => x.Command2, x => x.Command2, "MouseUp");
// Bind the command and the Func<T> parameter.
var fixture = new CommandBinderImplementation().BindCommand(vm, view, vm => vm.Command1, v => v.Command3, vm => vm.Value, "MouseUp");
Assert.Equal(0, vm.Value);
// Confirm that the values update as expected.
var parameter = 0;
vm.Command1.Subscribe(i => parameter = i);
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
Assert.Equal(1, vm.Value);
Assert.Equal(0, parameter);
view.Command3.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
Assert.Equal(1, parameter);
view.Command2.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
Assert.Equal(2, vm.Value);
Assert.Equal(1, parameter);
view.Command3.RaiseEvent(new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left)
{
RoutedEvent = UIElement.MouseUpEvent
});
Assert.Equal(2, parameter);
Assert.Equal(2, vm.Value);
}