public void IncrementalUpdate_makes_correct_number_of_changes()
{
Assert.AreEqual(
2,
CountChanges(
ListChange.IncrementalChanges(
new[] { 1, 2, 3 },
new[] { 1, 2, 3, 4, 5 }).Or(ListChange.None <int>())));
Assert.AreEqual(
2,
CountChanges(
ListChange.IncrementalChanges(
new[] { 1, 2, 5 },
new[] { 1, 2, 3, 4, 5 }).Or(ListChange.None <int>())));
Assert.AreEqual(
2,
CountChanges(
ListChange.IncrementalChanges(
new[] { 1, 2, 3, 4, 5 },
new[] { 1, 2, 3 }).Or(ListChange.None <int>())));
Assert.AreEqual(
2,
CountChanges(
ListChange.IncrementalChanges(
new[] { 1, 2, 3, 4, 5 },
new[] { 1, 2, 5 }).Or(ListChange.None <int>())));
}
public void IncrementalUpdate_returns_None_on_identical_lists()
{
var lists = OrderedCombinations(4);
foreach (var list in lists)
{
Assert.IsFalse(ListChange.IncrementalChanges(list, list).HasValue);
}
}
public void Applying_IncrementalUpdate_on_List_returns_correct_result()
{
var lists = OrderedCombinations(5);
foreach (var oldList in lists)
{
foreach (var newList in lists)
{
var maybeChanges = ListChange.IncrementalChanges(oldList, newList);
var result = oldList.ToList();
foreach (var changes in maybeChanges)
{
changes.Apply(result);
}
CollectionAssert.AreEqual(newList, result);
}
}
}