public void AddTo_CanBeAddedToNull()
{
AnItem parent = new AnItem();
AnItem child = new AnItem();
child.AddTo(parent);
Assert.AreEqual(parent, child.Parent);
EnumerableAssert.Contains(parent.Children, child);
child.AddTo(null);
Assert.IsNull(child.Parent);
EnumerableAssert.DoesntContain(parent.Children, child);
}
public void AddTo_IsRemovedFrom_PreviousParentChildren()
{
AnItem parent1 = new AnItem();
AnItem parent2 = new AnItem();
AnItem child = new AnItem();
child.AddTo(parent1);
EnumerableAssert.Contains(parent1.Children, child);
EnumerableAssert.DoesntContain(parent2.Children, child);
child.AddTo(parent2);
EnumerableAssert.DoesntContain(parent1.Children, child);
EnumerableAssert.Contains(parent2.Children, child);
}
public void AddTo_IsAppendedLast_EvenWhenSortOrder_MayIndicateOtherwise()
{
AnItem parent = new AnItem();
AnItem child1 = new AnItem();
child1.SortOrder = 4;
AnItem child2 = new AnItem();
child2.SortOrder = 3;
AnItem child3 = new AnItem();
child3.SortOrder = 2;
AnItem child4 = new AnItem();
child4.SortOrder = 1;
child1.AddTo(parent);
child2.AddTo(parent);
child3.AddTo(parent);
child4.AddTo(parent);
Assert.AreEqual(child1, parent.Children[0]);
Assert.AreEqual(child2, parent.Children[1]);
Assert.AreEqual(child3, parent.Children[2]);
Assert.AreEqual(child4, parent.Children[3]);
}
public void AddTo_IsAddedToChildren()
{
AnItem parent = new AnItem();
AnItem child = new AnItem();
child.AddTo(parent);
EnumerableAssert.Contains(parent.Children, child);
}
public void AddTo_UpdatesParentRelation()
{
AnItem parent = new AnItem();
AnItem child = new AnItem();
child.AddTo(parent);
Assert.AreEqual(parent, child.Parent);
}
public void AddsToChildrenWhenOnlyParentIsSet()
{
AnItem parent = new AnItem();
AnItem child = new AnItem();
child.Parent = parent;
child.AddTo(parent);
EnumerableAssert.Contains(parent.Children, child);
}
public void DoesntAddToChildrenTwice()
{
AnItem parent = new AnItem();
AnItem child = new AnItem();
parent.Children.Add(child);
child.AddTo(parent);
Assert.AreEqual(parent, child.Parent);
Assert.AreEqual(1, parent.Children.Count);
}
public void AddTo_IsAppendedLast()
{
AnItem parent = new AnItem();
AnItem child1 = new AnItem();
AnItem child2 = new AnItem();
AnItem child3 = new AnItem();
AnItem child4 = new AnItem();
child1.AddTo(parent);
child2.AddTo(parent);
child3.AddTo(parent);
child4.AddTo(parent);
Assert.AreEqual(child1, parent.Children[0]);
Assert.AreEqual(child2, parent.Children[1]);
Assert.AreEqual(child3, parent.Children[2]);
Assert.AreEqual(child4, parent.Children[3]);
}