public void AddToEmptyListAddsOneNewElement()
{
var initialArray = new ImageBox[0];
var newArray = AddNewImageSlotReducer.Reduce(initialArray, new AddNewImageSlotAction());
Assert.AreEqual(1, newArray.Length, "Reducer did not produce correct array length");
}
public void AddedElementIsEmptyImageBox()
{
var initialArray = new ImageBox[0];
var newArray = AddNewImageSlotReducer.Reduce(initialArray, new AddNewImageSlotAction());
Assert.IsInstanceOf <ImageBox.Empty>(newArray[0], "Reducer produced wrong type of ImageBox in new slot");
}
public void AddToEmptyListCreatesNewArray()
{
var initialArray = new ImageBox[0];
var newArray = AddNewImageSlotReducer.Reduce(initialArray, new AddNewImageSlotAction());
Assert.That(!ReferenceEquals(initialArray, newArray), "Reducer did not return a new object");
}
public void AddToFullListAddsNewElementToEnd()
{
var initialArray = new ImageBox[] { new ImageBox.Empty(), new ImageBox.Empty() };
var newArray = AddNewImageSlotReducer.Reduce(initialArray, new AddNewImageSlotAction());
Assert.That(ReferenceEquals(initialArray[0], newArray[0]), "Reducer did not keep position of existing item 0");
Assert.That(ReferenceEquals(initialArray[1], newArray[1]), "Reducer did not keep position of existing item 1");
Assert.AreNotEqual(initialArray[0], newArray[2], "New item matches existing item 0");
Assert.AreNotEqual(initialArray[1], newArray[2], "New item matches existing item 1");
}
