London | 26 ITP MAY | Russom Gebremeskel | Sprint 1 | Format Clock Edge Cases

format-clock-edge-cases/timeConverter.js

@@ -1,11 +1,18 @@
 function formatAs12HourClock(time) {
-
   const hours = Number(time.slice(0, 2));
 
+  const minutes = time.slice(3, 5);
+
+  if (hours === 0) {
+    return `12:${minutes} am`;
+  }
+  if (hours === 12) {
+    return `12:${minutes} pm`;
+  }
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${String(hours - 12).padStart(2, "0")}:${minutes} pm`;
   }
   return `${time} am`;
 }
 
-export {formatAs12HourClock};
+export { formatAs12HourClock };

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

@@ -1,11 +1,66 @@
-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("can correctly convert time last minute of the day", function () {
+  assert.equal(formatAs12HourClock("23:59"), "11:59 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("can correctly convert time at midnight ", function () {
+  assert.equal(formatAs12HourClock("00:00"), "12:00 am");
+});
+
+test("can correctly convert time just after midnight", function () {
+  assert.equal(formatAs12HourClock("00:01"), "12:01 am");
+});
+
+test("can correctly convert time at the first normal hour", function () {
+  assert.equal(formatAs12HourClock("01:00"), "01:00 am");
+});
+
+test("can correctly convert time on leading zeros in hour and minute", function () {
+  assert.equal(formatAs12HourClock("09:05"), "09:05 am");
+});
+
+test("can correctly convert time just last minute before noon", function () {
+  assert.equal(formatAs12HourClock("11:59"), "11:59 am");
+});
+
+test("can correctly convert time to PM at noon", function () {
+  assert.equal(formatAs12HourClock("12:00"), "12:00 pm");
+});
+
+test("can correctly convert time just afternoon", function () {
+  assert.equal(formatAs12HourClock("12:01"), "12:01 pm");
+});
+
+test("can correctly convert time last minute of the noon hour", function () {
+  assert.equal(formatAs12HourClock("12:59"), "12:59 pm");
+});
+
+test("can correctly convert time first hour after noon", function () {
+  assert.equal(formatAs12HourClock("13:00"), "01:00 pm");
+});
+
+test("correctly convert time before midnight", function () {
+  assert.equal(formatAs12HourClock("23:00"), "11:00 pm");
+});
+
+/* 
+Edge cases to be tested.
+   Input    Expected  What it tests
+1. 00:00 -> 12:00 am  Midnight: hour 0 becomes 12
+2. 00:01 -> 12:01 am  Just after midnight, still 12
+3. 01:00 -> 01:00 am  First normal morning hour
+4. 09:05 -> 09:05 am  Leading zeros in hour and minute
+5. 11:59 -> 11:59 am  Last minute before noon
+6. 12:00 -> 12:00 pm  Noon: switches to pm, hour stays 12
+7. 12:01 -> 12:01 pm  Just after noon, must not become 00
+8. 12:59 -> 12:59 pm  Last minute of the noon hour
+9. 13:00 -> 01:00 pm  First hour after noon: 13 - 12, padded
+10.23:59 -> 11:59 pm  Last minute of the day
+*/