public void AGlobalUndoLimitShouldBeEnforced()
{
string key = "key";
var mockTask = new MockUnit();
string expectedValue1 = "1";
var target = new UndoService();
target.SetMaximumUndoCount(2, key);
Assert.AreEqual(0, target.GetUnitCount(UndoService.UnitType.Repeatable, key), "Repeatable unit count should be 0.");
Assert.AreEqual(0, target.GetUnitCount(UndoService.UnitType.Undoable, key), "Undoable unit count should be 0.");
Assert.AreEqual(0, target.GetUnitCount(UndoService.UnitType.Redoable, key), "Redoable unit count should be 0.");
for (int i = 0; i < 5; i++)
{
target.PerformUnit(mockTask, expectedValue1, key);
}
Assert.AreEqual(2, target.GetUnitCount(UndoService.UnitType.Repeatable, key), "Repeatable tasks.");
Assert.AreEqual(0, target.GetUnitCount(UndoService.UnitType.Undoable, key), "Undoable tasks.");
Assert.AreEqual(0, target.GetUnitCount(UndoService.UnitType.Redoable, key), "Redoable tasks.");
MockUndoableUnit mockUndoableUnit = new MockUndoableUnit();
for (int i = 0; i < 5; i++)
{
target.PerformUnit(mockUndoableUnit, i.ToString(), key);
}
Assert.AreEqual(2, target.GetUnitCount(UndoService.UnitType.Repeatable, key), "Repeatable tasks.");
Assert.AreEqual(2, target.GetUnitCount(UndoService.UnitType.Undoable, key), "Undoable tasks.");
}
void UndoableTaskShouldBeRedoable(object key)
{
var task1 = new MockUndoableUnit();
var target = new UndoService();
Assert.IsFalse(target.CanRedo(key));
target.PerformUnit(task1, "1", key);
target.Undo(key);
Assert.IsTrue(target.CanRedo(key));
}
void PerformingTaskShouldClearUndoableList(object key)
{
/* First set up some undoable tasks. */
var task1 = new MockUndoableUnit();
var target = new UndoService();
target.PerformUnit(task1, "1", key);
Assert.IsTrue(target.CanUndo(key));
/* Perform a non-undoable unit. This must clear the undoable list. */
var task2 = new MockUnit {
RepeatableTest = true
};
target.PerformUnit(task2, "1", key);
Assert.IsFalse(target.CanUndo(key));
}
void TaskServiceShouldUndoTasks(object key)
{
var mockTask1 = new MockUndoableUnit {
RepeatableTest = true
};
string expectedValue1 = "1";
string expectedValue2 = "2";
var target = new UndoService();
Assert.IsFalse(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsFalse(target.CanRepeat(key));
target.PerformUnit(mockTask1, expectedValue1, key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 1);
Assert.IsTrue(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Undo(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 0);
Assert.IsFalse(target.CanUndo(key));
Assert.IsTrue(target.CanRedo(key));
Assert.IsFalse(target.CanRepeat(key));
target.Redo(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 1);
Assert.IsTrue(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Repeat(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 2);
Assert.IsTrue(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Repeat(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 3);
Assert.IsTrue(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Undo(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 2);
Assert.IsTrue(target.CanUndo(key));
Assert.IsTrue(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Undo(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 1);
Assert.IsTrue(target.CanUndo(key));
Assert.IsTrue(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Undo(key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 0);
Assert.IsFalse(target.CanUndo(key));
Assert.IsTrue(target.CanRedo(key));
Assert.IsFalse(target.CanRepeat(key));
var mockTask2 = new MockUndoableUnit {
RepeatableTest = true
};
target.PerformUnit(mockTask1, expectedValue1, key);
target.PerformUnit(mockTask2, expectedValue2, key);
Assert.AreEqual(mockTask1.LastArgument, expectedValue1);
Assert.AreEqual(mockTask1.ExecutionCount, 1);
Assert.AreEqual(mockTask2.LastArgument, expectedValue2);
Assert.AreEqual(mockTask2.ExecutionCount, 1);
Assert.IsTrue(target.CanUndo(key));
Assert.IsFalse(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
target.Undo(key);
Assert.AreEqual(mockTask1.ExecutionCount, 1);
Assert.AreEqual(mockTask2.ExecutionCount, 0);
Assert.IsTrue(target.CanUndo(key));
Assert.IsTrue(target.CanRedo(key));
Assert.IsTrue(target.CanRepeat(key));
var list = target.GetRepeatableUnits(key);
Assert.IsNotNull(list);
Assert.IsTrue(list.ToList().Count == 1);
}
