public void EditExecutesCommand()
{
var command = new ChangeHeightCommand(shape, 10);
commandProcessor.Do(command);
Assert.AreEqual(10, shape.Height);
}
public void EditEnablesUndo()
{
var command = new ChangeHeightCommand(shape, 10);
commandProcessor.Do(command);
Assert.IsTrue(commandProcessor.CanUndo());
}
public void MultipleRedos()
{
var command = new ChangeHeightCommand(shape, 10);
ChangeHeightManyTimes(commandProcessor, shape, 10);
UndoMany(commandProcessor, 5);
RedoMany(commandProcessor, 3);
Assert.AreEqual(70, shape.Height);
}
public void AfterNewEditRedoIsDisabled()
{
var command = new ChangeHeightCommand(shape, 10);
ChangeHeightManyTimes(commandProcessor, shape, 10);
UndoMany(commandProcessor, 3);
commandProcessor.Do(new ChangeWidthCommand(shape, 100));
Assert.IsFalse(commandProcessor.CanRedo());
}
public ChangeHeightCommandTests()
{
shape = new Shape();
shape.Height = 10;
changeHeightCommand = new ChangeHeightCommand(shape, 50);
}
private void ChangeHeightManyTimes(CommandProcessor editor, Shape shape, Int32 numberOfTimes)
{
for (var i = 0; i < numberOfTimes; i++)
{
var command = new ChangeHeightCommand(shape, i * 10);
editor.Do(command);
}
}
public void UndoWithOneCommandEnablesRedo()
{
var command = new ChangeHeightCommand(shape, 10);
commandProcessor.Do(command);
commandProcessor.Undo();
Assert.IsTrue(commandProcessor.CanRedo());
}
public void UndoWithOneCommandDisablesUndo()
{
var command = new ChangeHeightCommand(shape, 10);
commandProcessor.Do(command);
commandProcessor.Undo();
Assert.IsFalse(commandProcessor.CanUndo());
}
public void UndoRedoIsDisabledBeforeEdit()
{
var command = new ChangeHeightCommand(shape, 10);
Assert.IsFalse(commandProcessor.CanRedo());
Assert.IsFalse(commandProcessor.CanUndo());
}
public void RedoCallsUnexecute()
{
var command = new ChangeHeightCommand(shape, 10);
commandProcessor.Do(command);
commandProcessor.Undo();
commandProcessor.Redo();
Assert.AreEqual(10, shape.Height);
}