test: covering ordinal number cases

Author: zakiaao-tech

practice-tdd/get-ordinal-number.test.js

@@ -18,3 +18,48 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+//Test that numbers ending in 11 use "th".
+test("should return 'th' for the numbers ending in 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+
+//Test that numbers ending in 2, excluding numbers ending in 12.
+test("should append 'nd' for the numbers ending in 2, except those ending in 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+
+//Test that numbers ending in 3, excluding numbers ending in 13.
+test("should append 'rd' for the numbers ending in 3, except those ending in 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(33)).toEqual("33rd");
+  expect(getOrdinalNumber(133)).toEqual("133rd");
+});
+
+//Test that numbers ending in 13 use "th".
+test("should return 'th' for the numbers ending in 13", () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});
+
+//Test that numbers not ending in 1, 2, or 3 use "th".
+test("should append 'th' for other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(7)).toEqual("7th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+  expect(getOrdinalNumber(20)).toEqual("20th");
+});
+
+//Test that larger numbers ending in 12 use "th".
+test("should return 'th' for the numbers ending in 12", () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+});
+
+//Test that larger numbers ending in 11 use "th".
+test("should return 'th' for the numbers ending in 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+});