CodeYourFuture · ChinweP · Jul 27, 2026 · Jul 27, 2026 · Jul 27, 2026 · Jul 27, 2026
diff --git a/Sprint-2/interpret/invert.test.js b/Sprint-2/interpret/invert.test.js
@@ -0,0 +1,17 @@
+const invert = require("./invert.js");
+
+test("inverts a single key-value pair", () => {
+  expect(invert({ a: 1 })).toEqual({ 1: "a" });
+});
+
+test("inverts multiple key-value pairs", () => {
+  expect(invert({ a: 1, b: 2 })).toEqual({ 1: "a", 2: "b" });
+});
+
+test("handles empty objects", () => {
+  expect(invert({})).toEqual({});
+});
+
+test("handles string values", () => {
+  expect(invert({ x: "hello" })).toEqual({ hello: "x" });
+});
diff --git a/Sprint-3/alarmclock/alarmclock.js b/Sprint-3/alarmclock/alarmclock.js
@@ -1,4 +1,38 @@
-function setAlarm() {}
+function setAlarm() {
+  const input = document.getElementById("alarmSet");
+  const heading = document.getElementById("timeRemaining");
+
+  let remainingSeconds = Number(input.value);
+
+  function formatTime(totalSeconds) {
+    const minutes = Math.floor(totalSeconds / 60);
+    const seconds = totalSeconds % 60;
+
+    const mm = String(minutes).padStart(2, "0");
+    const ss = String(seconds).padStart(2, "0");
+
+    return `${mm}:${ss}`;
+  }
+
+  heading.innerText = `Time Remaining: ${formatTime(remainingSeconds)}`;
+
+  const intervalId = setInterval(() => {
+    remainingSeconds -= 1;
+
+    if (remainingSeconds > 0) {
+      heading.innerText = `Time Remaining: ${formatTime(remainingSeconds)}`;
+    } else {
+      heading.innerText = "Time Remaining: 00:00";
+      clearInterval(intervalId);
+      playAlarm();
+      document.body.classList.add("flash");
+    }
+  }, 1000);
+}
+
+function stopFlashingBackground() {
+  document.body.classList.remove("flash");
+}
 
 // DO NOT EDIT BELOW HERE
 

diff --git a/Sprint-3/alarmclock/index.html b/Sprint-3/alarmclock/index.html
@@ -4,7 +4,7 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <link rel="stylesheet" href="style.css" />
-    <title>Title here</title>
+    <title>Alarm clock app</title>
   </head>
   <body>
     <div class="centre">

diff --git a/Sprint-3/alarmclock/style.css b/Sprint-3/alarmclock/style.css
@@ -13,3 +13,13 @@
 h1 {
   text-align: center;
 }
+
+.flash {
+  animation: flash-bg 0.5s infinite alternate;
+}
+
+@keyframes flash-bg {
+  from { background-color: white; }
+  to { background-color: red; }
+}
+
diff --git a/Sprint-3/package.json b/Sprint-3/package.json
@@ -26,7 +26,7 @@
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/user-event": "^14.6.1",
-    "jest": "^30.0.4",
+    "jest": "^28.1.3",
     "jest-environment-jsdom": "^30.0.4"
   }
 }