public void TestFormatDuration() { // run string text1 = DataFormatter.FormatDuration(TimeSpan.Zero); string text2 = DataFormatter.FormatDuration(TimeSpan.FromHours(1.42)); string text3 = DataFormatter.FormatDuration(TimeSpan.FromDays(1.42)); // check Assert.AreEqual("0:00:00", text1, "formatted text must match"); Assert.AreEqual("1:25:12", text2, "formatted text must match"); Assert.AreEqual("1.10:04:48", text3, "formatted text must match"); }