Solution

.github/workflows/test.yml-template

@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test

src/herbivoresAndCarnivores.js

@@ -1,15 +1,42 @@
 'use strict';
 
 class Animal {
-  // write your code here
+  static alive = [];
+
+  constructor(name) {
+    this.name = name;
+    this.health = 100;
+    Animal.alive.push(this);
+  }
+
+  die() {
+    Animal.alive = Animal.alive.filter((animal) => animal !== this);
+  }
 }
 
 class Herbivore extends Animal {
-  // write your code here
+  constructor(name) {
+    super(name);
+    this.hidden = false;
+  }
+
+  hide() {
+    this.hidden = true;
+  }
 }
 
 class Carnivore extends Animal {
-  // write your code here
+  bite(target) {
+    if (!(target instanceof Herbivore) || target.hidden) {
+      return; // Cannot bite another carnivore or a hiding herbivore
+    }
+
+    target.health -= 50;
+
+    if (target.health <= 0) {
+      target.die();
+    }
+  }
 }
 
 module.exports = {