get-ordinal-number is done

Author: shaghayeghfar

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

@@ -1,8 +1,14 @@
 function getOrdinalNumber(number) {
-  if (number === 1) return "1st";
-  if (number === 2) return "2nd";
-  if (number === 3) return "3rd";
-  return number + "th";
+  if (number % 100 >= 11 && number % 100 <= 13) {
+    return number + "th";
+  } else {
+    const lastdigit = number.toString().slice(-1);
+
+    if (lastdigit == 1) return number + "st";
+    if (lastdigit == 2) return number + "nd";
+    if (lastdigit == 3) return number + "rd";
+    return number + "th";
+  }
 }
 
 module.exports = getOrdinalNumber;

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

@@ -32,3 +32,31 @@ test("should return '3rd' for 3", () => {
 test("should return '4th' for 4", () => {
   expect(getOrdinalNumber(4)).toEqual("4th");
 });
+
+// Case 9: Identify the ordinal number for 9
+// When the number is 9,
+// Then the function should return "4th"
+test("should return '9th' for 9", () => {
+  expect(getOrdinalNumber(9)).toEqual("9th");
+});
+
+// Case 10: Identify the ordinal number for 10
+// When the number is 10,
+// Then the function should return "4th"
+test("should return '10th' for 10", () => {
+  expect(getOrdinalNumber(10)).toEqual("10th");
+});
+
+// Case 11: Identify the ordinal number for 11
+// When the number is 11,
+// Then the function should return "4th"
+test("should return '11th' for 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+
+// Case 23: Identify the ordinal number for 23
+// When the number is 23,
+// Then the function should return "33rd"
+test("should return '23rd' for 23", () => {
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+});