public void SetAvatarURLTest() { string url = "https://somebiz.highrisehq.com"; Person person = new Person() { ID = 12345678 }; person.SetAvatarURL(url); Assert.AreEqual(String.Format(Person.AVATAR_URL_FORMAT, url, 1234, 5678), person.AvatarURL, "The person's avatar URL was not set correctly."); }