public void Test_FifthGridSquareCharacter_Negative() { short lonDirection = -1; decimal nearestEvenMultiple = -35.0m; var gsh = new GridSquareHelper(); var expectedResult = "Q"; string actualResult = gsh.GetFifthGridsquareCharacter(lonDirection, nearestEvenMultiple); Assert.AreEqual(expectedResult.ToUpper(), actualResult.ToUpper()); }