public void OneDigitNumbersTest() { Assert.AreEqual("zero", newObject.ConvertNumberToWords(0)); Assert.AreEqual("one", newObject.ConvertNumberToWords(1)); Assert.AreEqual("two", newObject.ConvertNumberToWords(2)); Assert.AreEqual("three", newObject.ConvertNumberToWords(3)); Assert.AreEqual("four", newObject.ConvertNumberToWords(4)); Assert.AreEqual("five", newObject.ConvertNumberToWords(5)); Assert.AreEqual("six", newObject.ConvertNumberToWords(6)); Assert.AreEqual("seven", newObject.ConvertNumberToWords(7)); Assert.AreEqual("eight", newObject.ConvertNumberToWords(8)); Assert.AreEqual("nine", newObject.ConvertNumberToWords(9)); }