Implement getOrdinalNumber function and add comprehensive test cases

Author: Baba05206

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

@@ -1,5 +1,16 @@
-function getOrdinalNumber(num) {
-  return "1st";
+function getOrdinalNumber(input) {
+  const lastDigit = input % 10;
+  const lastTwoDigits = input % 100;
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13) {
+    return input + "th";
+  } else if (lastDigit === 1) {
+    return input + "st";
+  } else if (lastDigit === 2) {
+    return input + "nd";
+  } else if (lastDigit === 3) {
+    return input + "rd";
+  } else {
+    return input + "th";
+  }
 }
-
 module.exports = getOrdinalNumber;

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

@@ -7,7 +7,69 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Case 1: Identify the ordinal number for 1
 // When the number is 1,
 // Then the function should return "1st"
-
 test("should return '1st' for 1", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
 });
+
+// Case 2: Identify the ordinal number for 2
+// When the number is 2,
+// Then the function should return "2nd"
+test('should return "2nd" for input 2', () => {
+  expect(getOrdinalNumber(2)).toBe("2nd");
+});
+
+// Case 3: Identify the ordinal number for 3
+// When the number is 3,
+// Then the function should return "3rd"
+test('should return "3rd" for input 3', () => {
+  expect(getOrdinalNumber(3)).toBe("3rd");
+});
+
+// Case 4: Handle special case for 11
+// When the number is 11,
+// Then the function should return "11th"
+test('should return "11th" for input 11', () => {
+  expect(getOrdinalNumber(11)).toBe("11th");
+});
+
+// Case 5: Handle special case for 12
+// When the number is 12,
+// Then the function should return "12th"
+test('should return "12th" for input 12', () => {
+  expect(getOrdinalNumber(12)).toBe("12th");
+});
+
+// Case 6: Handle special case for 13
+// When the number is 13,
+// Then the function should return "13th"
+test('should return "13th" for input 13', () => {
+  expect(getOrdinalNumber(13)).toBe("13th");
+});
+
+// Case 7: Identify the ordinal number for 21
+// When the number is 21,
+// Then the function should return "21st"
+test('should return "21st" for input 21', () => {
+  expect(getOrdinalNumber(21)).toBe("21st");
+});
+
+// Case 8: Identify the ordinal number for 102
+// When the number is 102,
+// Then the function should return "102nd"
+test('should return "102nd" for input 102', () => {
+  expect(getOrdinalNumber(102)).toBe("102nd");
+});
+
+// Case 9: Identify the ordinal number for 113
+// When the number is 113,
+// Then the function should return "113th"
+test('should return "113th" for input 113', () => {
+  expect(getOrdinalNumber(113)).toBe("113th");
+});
+
+// Case 10: Identify the ordinal number for 100
+// When the number is 100,
+// Then the function should return "100th"
+test('should return "100th" for input 100', () => {
+  expect(getOrdinalNumber(100)).toBe("100th");
+});