public void GivenAddedRoutedCommandHandlerWithCommand_WhenRoutedCommandExecuted_ThenCommandExecuted()
{
// Given
var parameter = new object();
var mocks = new MockRepository();
var command = mocks.StrictMock <ICommand>();
command.Expect(c => c.CanExecute(parameter)).Return(true);
command.Expect(c => c.Execute(parameter));
mocks.ReplayAll();
var frameworkElement = new FrameworkElement();
RoutedCommandHandlers handlers = RoutedCommandHandlers.GetCommands(frameworkElement);
var routedCommand = new RoutedCommand();
var handler = new RoutedCommandHandler
{
RoutedCommand = routedCommand,
Command = command
};
handlers.Add(handler);
// When
routedCommand.Execute(parameter, frameworkElement);
// Then
mocks.VerifyAll();
}
public void GivenFrameworkElement_WhenCommandsObtainedThroughRoutedCommands_ThenEmptyRoutedCommandHandlersReturned()
{
// Given
var frameworkElement = new FrameworkElement();
// When
RoutedCommandHandlers handlers = RoutedCommandHandlers.GetCommands(frameworkElement);
// Then
Assert.IsEmpty(handlers);
}
/// <summary>
/// Gets the collection of RoutedCommandHandler for a given element, creating
/// it if it doesn't already exist.
/// </summary>
public static RoutedCommandHandlers GetCommands(FrameworkElement element)
{
RoutedCommandHandlers handlers = (RoutedCommandHandlers)element.GetValue(CommandsProperty);
if (handlers == null)
{
handlers = new RoutedCommandHandlers(element);
element.SetValue(CommandsProperty, handlers);
}
return(handlers);
}
public void GivenHandlersFromFrameworkElement_WhenCommandsObtainedTwice_ThenSameInstanceReturned()
{
// Given
var frameworkElement = new FrameworkElement();
RoutedCommandHandlers handlersA = RoutedCommandHandlers.GetCommands(frameworkElement);
// When
RoutedCommandHandlers handlersB = RoutedCommandHandlers.GetCommands(frameworkElement);
// Then
Assert.AreSame(handlersA, handlersB);
}
public void GivenHandlersFromFrameworkElement_WhenRoutedCommandHandlerAdded_ThenPropertiesRegisteredAsCommandBindingToFrameworkElement()
{
// Given
var frameworkElement = new FrameworkElement();
RoutedCommandHandlers handlers = RoutedCommandHandlers.GetCommands(frameworkElement);
// When
var routedCommand = new RoutedCommand();
var handler = new RoutedCommandHandler
{
RoutedCommand = routedCommand
};
handlers.Add(handler);
// Then
Assert.AreEqual(1, handlers.Count);
Assert.AreSame(routedCommand, handlers.First().RoutedCommand);
}
public void GivenAddedRoutedCommandHandlerWithoutCommand_WhenRoutedCommandExecuted_ThenNoExceptionsAreThrown()
{
// Given
var frameworkElement = new FrameworkElement();
RoutedCommandHandlers handlers = RoutedCommandHandlers.GetCommands(frameworkElement);
var parameter = new object();
var routedCommand = new RoutedCommand();
var handler = new RoutedCommandHandler
{
RoutedCommand = routedCommand
};
handlers.Add(handler);
// When
void Call() => routedCommand.Execute(parameter, frameworkElement);
// Then
Assert.DoesNotThrow(Call);
}
