public void ReducerCopiesArray()
{
var initialArray = new ImageBox[] { new ImageBox.Empty() };
var newArray = DeleteImageSlotReducer.Reduce(initialArray, new DeleteImageSlotAction(0));
Assert.That(!ReferenceEquals(initialArray, newArray), "Reducer did not produce new array object");
}
public void ReducerDeletesCorrectElementEndOfArray()
{
var initialArray = new ImageBox[] { new ImageBox.Empty(), new ImageBox.Empty(), new ImageBox.Empty(), new ImageBox.Empty(), new ImageBox.Empty() };
var newArray = DeleteImageSlotReducer.Reduce(initialArray, new DeleteImageSlotAction(4));
CheckElements(initialArray, newArray, 0, 0);
CheckElements(initialArray, newArray, 1, 1);
CheckElements(initialArray, newArray, 2, 2);
CheckElements(initialArray, newArray, 3, 3);
}
public void EmptyInitialArrayThrows()
{
var initialArray = new ImageBox[0];
Assert.Throws <ArgumentException>(() => DeleteImageSlotReducer.Reduce(initialArray, new DeleteImageSlotAction(0)), "Reducer did not throw when attempting to delete slot from empty array");
}
public void InvalidIndexThrows()
{
var initialArray = new ImageBox[] { new ImageBox.Empty() };
Assert.Throws <IndexOutOfRangeException>(() => DeleteImageSlotReducer.Reduce(initialArray, new DeleteImageSlotAction(2)), "Reducer did not throw when index was out of range");
}
