public void WhenBothHaveNoChildren_ReturnsNull()
{
var current = CreateListTreeItem();
var next = CreateListTreeItem();
var actual = TreeComparer.FromList(current, next);
Assert.That(actual, Is.Null);
}
public void WhenKeyItemChanges_MarkItAsModified()
{
var first = CreateStateObjectTreeItem(CreateNamedPrimitiveTreeItem("Text", "a"));
var modified = CreateStateObjectTreeItem(CreateNamedPrimitiveTreeItem("Text", "b"));
var current = CreateListTreeItem(first);
var next = CreateListTreeItem(modified);
var actual = TreeComparer.FromList(current, next);
Assert.That(actual.Children.Length, Is.EqualTo(1));
Assert.That(actual.DiffType, Is.EqualTo(DiffType.Modified));
}
public void WhenCurrentHasChildAndNextHasNone_ContainsProperChildren()
{
var current = CreateListTreeItem(CreatePrimitiveTreeItem(5));
var next = CreateListTreeItem();
var actual = TreeComparer.FromList(current, next);
Assert.That(actual.Children.Length, Is.EqualTo(1));
Assert.That(actual.Children[0].Current, Is.SameAs(current.Children[0]));
Assert.That(actual.Children[0].Next, Is.Null);
Assert.That(actual.Children[0].DiffType, Is.EqualTo(DiffType.Removed));
}
public void WhenCurrentHasChildAndNextHasNone_ReturnsModified()
{
var current = CreateListTreeItem(CreatePrimitiveTreeItem(5));
var next = CreateListTreeItem();
var actual = TreeComparer.FromList(current, next);
Assert.That(actual, Is.InstanceOf <DifferenceItemContainer>());
Assert.That(actual.DiffType, Is.EqualTo(DiffType.Modified));
Assert.That(actual.Current, Is.SameAs(current));
Assert.That(actual.Next, Is.SameAs(next));
}