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);
}