public static void ToString___Should_return_friendly_string_representation_of_object___When_called() { // Arrange var systemUnderTest1 = new CalendarQuarter(2017, QuarterNumber.Q1); var systemUnderTest2 = new CalendarQuarter(2017, QuarterNumber.Q4); // Act var toString1 = systemUnderTest1.ToString(); var toString2 = systemUnderTest2.ToString(); // Assert toString1.Should().Be("1Q2017"); toString2.Should().Be("4Q2017"); }