public virtual void TestIndexOf()
{
Collection4 c = new Collection4();
Assert.AreEqual(-1, c.IndexOf("notInCollection"));
c.Add("one");
Assert.AreEqual(-1, c.IndexOf("notInCollection"));
Assert.AreEqual(0, c.IndexOf("one"));
c.Add("two");
c.Add("three");
Assert.AreEqual(0, c.IndexOf("one"));
Assert.AreEqual(1, c.IndexOf("two"));
Assert.AreEqual(2, c.IndexOf("three"));
Assert.AreEqual(-1, c.IndexOf("notInCollection"));
}
