Manchester | 26-ITP-Sep | Precious Moses | Sprint 1 | FormatAs12HourClock

format-clock-edge-cases/timeConverter.js

@@ -1,11 +1,10 @@
 function formatAs12HourClock(time) {
+  const [hourPart, minutePart] = time.split(":");
+  const hours = Number(hourPart);
 
-  const hours = Number(time.slice(0, 2));
+  const period = hours < 12 ? "am" : "pm";
 
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
-  }
-  return `${time} am`;
+  const displayHour = hours % 12 || 12;
+  return `${displayHour}:${minutePart}${period}`;
 }
-
-export {formatAs12HourClock};
+export { formatAs12HourClock };

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

@@ -1,11 +1,41 @@
-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", () => {
+  assert.equal(formatAs12HourClock("23:00"), "11:00pm");
 });
 
-test("can correctly convert morning time", function() {
-    assert.equal(formatAs12HourClock("08:00"), "08:00 am");
+test("converts a single-digit morning hour and drops leading zero", () => {
+  assert.equal(formatAs12HourClock("08:00"), "8:00am");
+});
+test("converts exactly to midnight", () => {
+  assert.equal(formatAs12HourClock("00:00"), "12:00am");
+});
+test("converts time just after midnight", () => {
+  assert.equal(formatAs12HourClock("00:30"), "12:30am");
+});
+test("converts the last minute before noon", () => {
+  assert.equal(formatAs12HourClock("11:59"), "11:59am");
+});
+test("converts exact noon to pm", () => {
+  assert.equal(formatAs12HourClock("12:00"), "12:00pm");
+});
+test("convert time just after noon", () => {
+  assert.equal(formatAs12HourClock("12:30"), "12:30pm");
+});
+test("converts the first afternoon hour", () => {
+  assert.equal(formatAs12HourClock("13:00"), "1:00pm");
+});
+test("converts late evening hour", () => {
+  assert.equal(formatAs12HourClock("23:00"), "11:00pm");
+});
+test("converts last minute of the day", () => {
+  assert.equal(formatAs12HourClock("23:59"), "11:59pm");
+});
+test("preserves minutes with leading zero", () => {
+  assert.equal(formatAs12HourClock("09:05"), "9:05am");
+});
+test("preserves non-zero minutes", () => {
+  assert.equal(formatAs12HourClock("14:45"), "2:45pm");
 });