public void TestIndexOf_ValueNotFound_ReturnsNegativeOne()
{
StringAdapter list = new StringAdapter("Hello");
int index = list.IndexOf('r');
Assert.AreEqual(-1, index, "The wrong index was returned.");
}
public void TestIndexOf_ValueFound_ReturnsFirst()
{
StringAdapter list = new StringAdapter("Hello, Yellow");
int index = list.IndexOf('e');
Assert.AreEqual(1, index, "The wrong index was returned.");
}
