Fix 12-hour clock conversion and add edge case tests

Author: codebyra

format-clock-edge-cases/timeConverter.js

@@ -1,11 +1,16 @@
-function formatAs12HourClock(time) {
-
+export function formatAs12HourClock(time) {
   const hours = Number(time.slice(0, 2));
+  const minutes = time.slice(2);
+
+  const period = hours >= 12 ? "pm" : "am";
+
+  let hours12 = hours % 12;
 
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+  if (hours12 === 0) {
+    hours12 = 12;
   }
-  return `${time} am`;
-}
 
-export {formatAs12HourClock};
+  const formattedHours = String(hours12).padStart(2, "0");
+
+  return `${formattedHours}${minutes} ${period}`;
+}

format-clock-edge-cases/timeConverter.test.js

@@ -1,11 +1,67 @@
-import {formatAs12HourClock} from "./timeConverter.js";
+import { formatAs12HourClock } from "./timeConverter.js";
 import assert from "node:assert";
 import test from "node:test";
 
-test("correctly convert time after 12:00", function(){
-    assert.equal(formatAs12HourClock("23:00"), "11:00 pm");
+test("correctly convert time after 12:00", function () {
+  assert.equal(formatAs12HourClock("23:00"), "11:00 pm");
 });
 
-test("can correctly convert morning time", function() {
-    assert.equal(formatAs12HourClock("08:00"), "08:00 am");
+test("can correctly convert morning time", function () {
+  assert.equal(formatAs12HourClock("08:00"), "08:00 am");
+});
+
+test("converts midnight correctly", function () {
+  assert.equal(formatAs12HourClock("00:00"), "12:00 am");
+});
+
+test("converts one minute after midnight", function () {
+  assert.equal(formatAs12HourClock("00:01"), "12:01 am");
+});
+
+test("converts early morning time", function () {
+  assert.equal(formatAs12HourClock("01:30"), "01:30 am");
+});
+
+test("converts last minute before noon", function () {
+  assert.equal(formatAs12HourClock("11:59"), "11:59 am");
+});
+
+test("converts noon correctly", function () {
+  assert.equal(formatAs12HourClock("12:00"), "12:00 pm");
+});
+
+test("converts one minute after noon", function () {
+  assert.equal(formatAs12HourClock("12:01"), "12:01 pm");
+});
+
+test("converts afternoon time", function () {
+  assert.equal(formatAs12HourClock("13:30"), "01:30 pm");
+});
+
+test("converts evening time", function () {
+  assert.equal(formatAs12HourClock("18:45"), "06:45 pm");
+});
+
+test("converts last minute of the day", function () {
+  assert.equal(formatAs12HourClock("23:59"), "11:59 pm");
+});
+
+test("converts 09:59 correctly", function () {
+  assert.equal(formatAs12HourClock("09:59"), "09:59 am");
+});
+
+test("converts 10:00 correctly", function () {
+  assert.equal(formatAs12HourClock("10:00"), "10:00 am");
+});
+
+test("converts 12:59 correctly", function () {
+  assert.equal(formatAs12HourClock("12:59"), "12:59 pm");
+});
+
+test("converts 13:00 correctly", function () {
+  assert.equal(formatAs12HourClock("13:00"), "01:00 pm");
+});
+
+test("converts 23:00 correctly", function () {
+  assert.equal(formatAs12HourClock("23:00"), "11:00 pm");
 });