Added getOrdinalNumber function

Author: khalidbih

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -4,7 +4,7 @@ function getOrdinalNumber(num){
     return num+ "th";
   }
 
-  const lastDigits = num %10;
+  const lastDigit = num %10;
 
   switch (lastDigit){
     case 1:

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -11,3 +11,48 @@ const getOrdinalNumber = require("./get-ordinal-number");
 test("should return '1st' for 1", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
 });
+
+
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+
+
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+
+test("should return '4th' for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});
+
+test("should return '11th', '12th', '13th' for special cases", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});
+
+test("should return '21st', '22nd', '23rd'", () => {
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(101)).toEqual("101st");
+  expect(getOrdinalNumber(102)).toEqual("102nd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+});
+
+test("should return correct 'th' for numbers ending in 4-9 or 0", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(5)).toEqual("5th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+});
+
+  
+
+