public void BuildNumberText_even_hundred_numbers()
 {
     Assert.AreEqual("eight hundred", Problem17.BuildNumberText(800));
 }
 public void BuildNumberText_between_100_and_999()
 {
     Assert.AreEqual("seven hundred and fifty eight", Problem17.BuildNumberText(758));
     Assert.AreEqual("three hundred and seventy six", Problem17.BuildNumberText(376));
 }
 public void BuildNumberText_between_21_and_99()
 {
     Assert.AreEqual("ninety nine", Problem17.BuildNumberText(99));
 }
 public void BuildNumberText_eighty()
 {
     Assert.AreEqual("eighty", Problem17.BuildNumberText(80));
 }
 public void BuildNumberText_two_digits_not_in_dictionary()
 {
     Assert.AreEqual("sixty", Problem17.BuildNumberText(60));
 }
 public void BuildNumberText_twenty_or_less()
 {
     Assert.AreEqual("twenty", Problem17.BuildNumberText(20));
 }