public void Capitalize() { Uppgifter up = new Uppgifter(); string str = "test1 test2 test3.,:"; var act = up.Capitalize(str); Regex number = new Regex(@"[0-9]+$"); Assert.IsTrue(act.IsUpper() && act.Contains("_") && !act.Contains(" ") && !number.IsMatch(act)); TestContext.WriteLine(act); }