chore(curriculum): update step 12 and 13 music player tests (freeCodeCamp#57361)

Co-authored-by: Ilenia <[email protected]>
Co-authored-by: Naomi <[email protected]>

Author: 3 people

curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/660ae8ad1475698da3c3c37d.md

@@ -29,8 +29,45 @@ Your `printGreeting` function call should be below the `printGreeting` function
 assert.isBelow(code.indexOf("const printGreeting = () => {"), code.indexOf("printGreeting()"));
 ```
 
+Your `printGreeting` function call should output `Hello there!` to the console. 
+
+```js
+assert.strictEqual(logOutput, "Hello there!"); 
+```
+
 # --seed--
 
+## --before-user-code--
+
+```js
+let logOutput = "";
+const originalConsole = console;
+function capture() {
+    const nativeLog = console.log;
+    console.log = function (message) {
+        logOutput = message;
+        if(nativeLog.apply) {
+          nativeLog.apply(originalConsole, arguments);
+        } else {
+          const nativeMsg = Array.prototype.slice.apply(arguments).join(' ');
+          nativeLog(nativeMsg);
+        }
+    };
+}
+
+function uncapture() {
+  console.log = originalConsole.log;
+}
+
+capture();
+```
+
+## --after-user-code--
+
+```js
+uncapture();
+```
+
 ## --seed-contents--
 
 ```html

curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/660aea8782242e8f4bcc42d8.md

@@ -79,8 +79,47 @@ const functionDefinition = code.indexOf("printMessage =");
 assert.isBelow(functionDefinition, functionCall);
 ```
 
+Your `printMessage` function call should output `freeCodeCamp is awesome!` to the console. 
+
+```js
+assert.strictEqual(logOutput, "freeCodeCamp is awesome!"); 
+```
+
 # --seed--
 
+
+## --before-user-code--
+
+```js
+let logOutput = "";
+const originalConsole = console;
+function capture() {
+    const nativeLog = console.log;
+    console.log = function (message) {
+        logOutput = message;
+        if(nativeLog.apply) {
+          nativeLog.apply(originalConsole, arguments);
+        } else {
+          const nativeMsg = Array.prototype.slice.apply(arguments).join(' ');
+          nativeLog(nativeMsg);
+        }
+    };
+}
+
+function uncapture() {
+  console.log = originalConsole.log;
+}
+
+capture();
+```
+
+## --after-user-code--
+
+```js
+uncapture();
+```
+
+
 ## --seed-contents--
 
 ```html