public void RemoveFirstMethod_RemovesTheOnlyItemFromList()
{
SimpleLinkedList <string> linkedList = new SimpleLinkedList <string>();
linkedList.AddFirst("asdf");
linkedList.RemoveFirst();
Assert.Null(linkedList.Find("asdf"));
}
public void RemoveFirstMethod_SetsThe_FirstProperty_ToTheSecondNodeIfTheItemToBeRemovedIsTheHeadOfTheList()
{
SimpleLinkedList <string> linkedList = new SimpleLinkedList <string>();
linkedList.AddFirst("new Item 1");
linkedList.AddFirst("new Item 2");
linkedList.RemoveFirst();
Assert.Equal("new Item 1", linkedList.First.Item);
}
public void RemoveFirstMethod_RemovesTheFirstItemInTheList()
{
SimpleLinkedList <string> linkedList = new SimpleLinkedList <string>();
linkedList.AddFirst("asdf");
linkedList.AddFirst("qwer");
linkedList.RemoveFirst();
Assert.NotEqual("qwer", linkedList.First.Item);
}
public void RemoveFirstMethod_DecrementsLengthOfList()
{
SimpleLinkedList <string> linkedList = new SimpleLinkedList <string>();
int expectedCount = 0;
linkedList.AddFirst("asdf"); expectedCount++;
linkedList.AddFirst("qwer"); expectedCount++;
linkedList.RemoveFirst(); expectedCount--;
Assert.Equal(expectedCount, linkedList.Count);
}
public void RemoveFirstMethod_SetsThe_LastProperty_ToNullIfTheItemToBeRemovedIsTheOnlyItemInTheList()
{
SimpleLinkedList <string> linkedList = new SimpleLinkedList <string>();
linkedList.AddLast("new Item 1");
linkedList.RemoveFirst();
// acessing linkedList.Last throws exception if the tail of the list is null
Assert.Throws <InvalidOperationException>(
delegate
{
LinkedListNode <string> node = linkedList.Last;
});
}
public void RemoveFirstMethod_SetsThe_LastProperty_ToNullIfTheItemToBeRemovedIsTheOnlyItemInTheList()
{
SimpleLinkedList<string> linkedList = new SimpleLinkedList<string>();
linkedList.AddLast("new Item 1");
linkedList.RemoveFirst();
// acessing linkedList.Last throws exception if the tail of the list is null
Assert.Throws<InvalidOperationException>(
delegate
{
LinkedListNode<string> node = linkedList.Last;
});
}
public void RemoveFirstMethod_SetsThe_FirstProperty_ToTheSecondNodeIfTheItemToBeRemovedIsTheHeadOfTheList()
{
SimpleLinkedList<string> linkedList = new SimpleLinkedList<string>();
linkedList.AddFirst("new Item 1");
linkedList.AddFirst("new Item 2");
linkedList.RemoveFirst();
Assert.Equal("new Item 1", linkedList.First.Item);
}
public void RemoveFirstMethod_RemovesTheOnlyItemFromList()
{
SimpleLinkedList<string> linkedList = new SimpleLinkedList<string>();
linkedList.AddFirst("asdf");
linkedList.RemoveFirst();
Assert.Null(linkedList.Find("asdf"));
}
public void RemoveFirstMethod_RemovesTheFirstItemInTheList()
{
SimpleLinkedList<string> linkedList = new SimpleLinkedList<string>();
linkedList.AddFirst("asdf");
linkedList.AddFirst("qwer");
linkedList.RemoveFirst();
Assert.NotEqual("qwer", linkedList.First.Item);
}
public void RemoveFirstMethod_DecrementsLengthOfList()
{
SimpleLinkedList<string> linkedList = new SimpleLinkedList<string>();
int expectedCount = 0;
linkedList.AddFirst("asdf"); expectedCount++;
linkedList.AddFirst("qwer"); expectedCount++;
linkedList.RemoveFirst(); expectedCount--;
Assert.Equal(expectedCount, linkedList.Count);
}
