Added possible and invalid cases and tested using npx jest

Author: Mahtem

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

@@ -8,6 +8,39 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
+// Case 1: 1 → Standard ordinals
+
+test("should return correct ordinals for 1, 2, 3, 4, 21, 22, 23, 24", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(21)).toEqual("21st");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(24)).toEqual("24th");
+});
+
+// Case 2: Exceptions 11, 12, 13
+test("should handle exceptions 11, 12, 13 correctly", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(111)).toEqual("111th"); 
+});
+
+// Case 3: Large numbers
+test("should handle larger numbers correctly", () => {
+  expect(getOrdinalNumber(101)).toEqual("101st");
+  expect(getOrdinalNumber(112)).toEqual("112th"); 
+  expect(getOrdinalNumber(123)).toEqual("123rd");
+});
+
+// Case 4: Invalid cases / inputs 
+test("should throw error for zero, negative or non-integer inputs", () => {
+  expect(() => getOrdinalNumber(0)).toThrow("Only positive integers are allowed");
+  expect(() => getOrdinalNumber(-5)).toThrow("Only positive integers are allowed");
+  expect(() => getOrdinalNumber(2.5)).toThrow("Only positive integers are allowed");
 });
+
+// Added possible and invalid cases and tested using npx jest