public void should_call_old_method()
{
var expert = "This is Old Method";
var actual = ChangeMethod.OldMethod();
Assert.AreEqual(expert, actual);
}
public void should_call_new_method()
{
var changeMethod = new ChangeMethod();
var expert = "This is New Method";
var actual = changeMethod.NewMethod();
Assert.AreEqual(expert, actual);
}