public void CallCollectionClearSetsParentReferenceToNull()
{
Post p = new Post("Flaming");
Comment c;
p.Comments.Add(c = new Comment("Ashes"));
p.Comments.Clear();
Assert.AreEqual(0, p.Comments.Count);
Assert.IsNull(c.Post);
}
public void AddCommentToPostSetsPostOnComment()
{
Post p = new Post("Flaming");
p.Comments.Add(new Comment("Ashes"));
Assert.AreEqual(p, p.Comments[0].Post);
Comment c = new Comment("backwards");
c.Post = p = new Post("yeah");
Assert.AreEqual(1, p.Comments.Count);
Assert.AreEqual(p, p.Comments[0].Post);
}
public void CallingRemoveAtWillCallDelegate()
{
Post p = new Post("Flaming");
Comment c = new Comment("Ashes");
p.Comments.Add(c);
p.Comments.RemoveAt(0);
Assert.IsNull(c.Post);
}
public void ModifyCollectionsUsingInsertAtPositionAllowsDoubling()
{
Post p = new Post("q");
Comment c = new Comment("a");
p.Comments.Add(c);
p.Comments.Insert(0,c);
p.Comments.Add(c);
Assert.AreEqual(2, p.Comments.Count);
}
public void DoubleAddOfSameInstanceDoesNothing()
{
/* I have modified EntityList.DoAdd with this to prevent adding the same item twice
*
if (_list.Contains(item))
return false;
else
{
_list.Add(item);
return true;
}
*/
Post p = new Post("1");
Comment c;
p.Comments.Add(new Comment("c1"));
Assert.AreEqual(1, p.Comments.Count);
p.Comments.Add(c = new Comment("c2"));
Assert.AreEqual(2, p.Comments.Count);
p.Comments.Add(c);
Assert.AreEqual(2, p.Comments.Count, "Double test add failed");
}