get ordinal numbers updated template

Author: Fithi-Teklom

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

@@ -1,5 +1,61 @@
+
 function getOrdinalNumber(num) {
-  return "1st";
+  const remainder10 = num % 10;
+  const remainder100 = num % 100;
+
+  if (remainder100 >= 11 && remainder100 <= 13) {
+    return `${num}th`;
+  }
+
+  switch (remainder10) {
+    case 1:
+      return `${num}st`;
+    case 2:
+      return `${num}nd`;
+    case 3:
+      return `${num}rd`;
+    default:
+      return `${num}th`;
+  }
 }
 
 module.exports = getOrdinalNumber;
+
+
+const getOrdinalNumber = require("./getOrdinalNumber");
+
+describe("getOrdinalNumber()", () => {
+  test("should return '1st' for 1", () => {
+    expect(getOrdinalNumber(1)).toBe("1st");
+  });
+
+  test("should return '2nd' for 2", () => {
+    expect(getOrdinalNumber(2)).toBe("2nd");
+  });
+
+  test("should return '3rd' for 3", () => {
+    expect(getOrdinalNumber(3)).toBe("3rd");
+  });
+
+  test("should return '4th' for 4", () => {
+    expect(getOrdinalNumber(4)).toBe("4th");
+  });
+
+  test("should return '11th', '12th', '13th' for special cases", () => {
+    expect(getOrdinalNumber(11)).toBe("11th");
+    expect(getOrdinalNumber(12)).toBe("12th");
+    expect(getOrdinalNumber(13)).toBe("13th");
+  });
+
+  test("should return correct suffixes for 21, 22, 23", () => {
+    expect(getOrdinalNumber(21)).toBe("21st");
+    expect(getOrdinalNumber(22)).toBe("22nd");
+    expect(getOrdinalNumber(23)).toBe("23rd");
+  });
+
+  test("should return '111th' for numbers ending with 11, 12, 13 even if larger", () => {
+    expect(getOrdinalNumber(111)).toBe("111th");
+    expect(getOrdinalNumber(112)).toBe("112th");
+    expect(getOrdinalNumber(113)).toBe("113th");
+  });
+});