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

package.json

@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^2.1.0",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",

src/animals.js

@@ -0,0 +1,46 @@
+class Animal {
+  static alive = [];
+
+  constructor(name) {
+    this.name = name;
+    this.health = 100;
+    Animal.alive.push(this);
+  }
+
+  die() {
+    Animal.alive = Animal.alive.filter(
+      (animalInstance) => animalInstance !== this,
+    );
+  }
+
+  info() {
+    return `${this.name} - Health: ${this.health}`;
+  }
+}
+
+class Herbivore extends Animal {
+  constructor(name) {
+    super(name);
+    this.hidden = false;
+  }
+
+  hide() {
+    this.hidden = true;
+  }
+}
+
+class Carnivore extends Animal {
+  bite(victim) {
+    if (!(victim instanceof Herbivore) || victim.hidden) {
+      return;
+    }
+
+    victim.health = Math.max(0, victim.health - 50);
+
+    if (victim.health <= 0) {
+      victim.die();
+    }
+  }
+}
+
+export { Animal, Herbivore, Carnivore };

src/transformStateWithClones.js

@@ -8,6 +8,22 @@
  */
 function transformStateWithClones(state, actions) {
   // write code here
+  let currentState = { ...state };
+  const statesHistory = [];
+
+  actions.forEach((action) => {
+    if (action.type === 'clear') {
+      currentState = {};
+    } else if (action.type === 'addProperties') {
+      currentState = { ...currentState, ...action.extraData };
+    } else if (action.type === 'removeProperties') {
+      currentState = { ...currentState };
+      action.keysToRemove.forEach((key) => delete currentState[key]);
+    }
+    statesHistory.push({ ...currentState });
+  });
+
+  return statesHistory;
 }
 
 module.exports = transformStateWithClones;