public void ControllerShouldReportUndoRedoStatus()
{
var testCommand = new AdHocCommand(() => { }, () => { });
var controller = new Controller();
var undoAvailable = false;
var redoAvailable = false;
controller.UndoAvailabilityChanged += (_, args) => undoAvailable = args.IsAvailable;
controller.RedoAvailabilityChanged += (_, args) => redoAvailable = args.IsAvailable;
controller.Execute(testCommand);
Assert.True(undoAvailable);
Assert.False(redoAvailable);
controller.Undo();
Assert.False(undoAvailable);
Assert.True(redoAvailable);
controller.Redo();
Assert.True(undoAvailable);
Assert.False(redoAvailable);
}
public void ControllerShouldExecuteGivenCommand()
{
var executed = false;
var testCommand = new AdHocCommand(() => executed = true);
var controller = new Controller();
controller.Execute(testCommand);
Assert.True(executed);
}
public void ControllerShouldAllowToUndoCommand()
{
var executed = false;
var undone = false;
var testCommand = new AdHocCommand(() => executed = true, () => undone = true);
var controller = new Controller();
controller.Execute(testCommand);
Assert.True(executed);
Assert.False(undone);
controller.Undo();
Assert.True(executed);
Assert.True(undone);
}
public void ControllerShouldAllowToRedoCommand()
{
var executed = 0;
var undone = false;
var testCommand = new AdHocCommand(() => ++ executed, () => undone = true);
var controller = new Controller();
controller.Execute(testCommand);
Assert.AreEqual(1, executed);
Assert.False(undone);
controller.Undo();
Assert.AreEqual(1, executed);
Assert.True(undone);
controller.Redo();
Assert.AreEqual(2, executed);
}
