public void IsValid_ValidInput_ReturnsTrue() { string[] valid_strings = { "1_Adam.Holy", "13_Adam.Holy", "123_ADam.Holy", "020_Jan.Krutý", "21_Petr.Malý", "021_Pavel.Novák", "514_Karel.Ospalý" }; foreach (string s in valid_strings) { record.ChangeRecord(s); bool result = record.IsValid(); Assert.AreEqual(true, result); } }