public void Enumeration()
{
var list = new LALinkedList <string>();
list.AddLast("John");
list.AddLast("Fred");
list.AddLast("Sam");
string[] expected = new string[] { "John", "Fred", "Sam" };
int count = 0;
var e = list.GetEnumerator();
while (e.MoveNext())
{
Assert.AreEqual(expected[count], e.Current);
count++;
}
Assert.AreEqual(3, count);
count = 0;
foreach (string s in list)
{
Assert.AreEqual(expected[count], s);
count++;
}
Assert.AreEqual(3, count);
}
public void Remove()
{
var list = new LALinkedList <string>();
list.Remove("John");
list.AddLast("John");
list.AddLast("Fred");
list.AddLast("Sam");
list.Remove(null);
Assert.AreEqual(3, list.Count);
list.Remove("Fred");
Assert.IsTrue(!list.Contains("Fred"));
Assert.AreEqual(2, list.Count);
list.Remove("John");
Assert.IsTrue(!list.Contains("John"));
Assert.AreEqual(1, list.Count);
list.Remove("Sam");
Assert.IsTrue(!list.Contains("Sam"));
Assert.AreEqual(0, list.Count);
}
public void Contains()
{
var list = new LALinkedList <string>();
list.AddFirst("John");
list.AddFirst("Fred");
Assert.IsTrue(list.Contains("John"));
Assert.IsTrue(list.Contains("Fred"));
Assert.IsFalse(list.Contains("Sam"));
Assert.IsFalse(list.Contains(null));
}
public void RemoveLast()
{
var list = new LALinkedList <string>();
list.AddLast("John");
list.AddLast("Fred");
list.RemoveLast();
Assert.AreEqual("John", list.First.Value);
Assert.AreEqual("John", list.Last.Value);
Assert.AreEqual(1, list.Count);
}
public void ModifiedDuringEnumeration_ThrowsException()
{
var list = new LALinkedList <string>();
list.AddLast("John");
list.AddLast("Fred");
list.AddLast("Sam");
foreach (string s in list)
{
list.Remove(s);
}
}
public void Clear()
{
var list = new LALinkedList <string>();
list.AddFirst("John");
list.AddFirst("Fred");
list.Clear();
Assert.IsNull(list.First);
Assert.IsNull(list.Last);
Assert.AreEqual(0, list.Count);
}
public void Enumeration_IsNeverNull()
{
var list = new LALinkedList <object>();
foreach (object o in list)
{
Assert.IsNotNull(o);
}
list.AddLast(new object());
list.AddLast(new object());
list.AddLast(new object());
foreach (object o in list)
{
Assert.IsNotNull(o);
}
list.RemoveLast();
foreach (object o in list)
{
Assert.IsNotNull(o);
}
list.RemoveFirst();
foreach (object o in list)
{
Assert.IsNotNull(o);
}
list.Clear();
foreach (object o in list)
{
Assert.IsNotNull(o);
}
}
