From eb2fd128ddc91f6260c47f07e6e9a8a40457f86e Mon Sep 17 00:00:00 2001
From: Egor Fomin <egorfomin419@gmail.com>
Date: Sat, 3 Jan 2026 18:23:45 +0200
Subject: [PATCH 1/3] Solution

---
 .github/workflows/test.yml-template | 23 +++++++++++++++++++++++
 package-lock.json                   |  9 +++++----
 package.json                        |  2 +-
 src/transformStateWithClones.js     | 28 +++++++++++++++++++++++++++-
 4 files changed, 56 insertions(+), 6 deletions(-)
 create mode 100644 .github/workflows/test.yml-template

diff --git a/.github/workflows/test.yml-template b/.github/workflows/test.yml-template
new file mode 100644
index 000000000..bb13dfc45
--- /dev/null
+++ b/.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
diff --git a/package-lock.json b/package-lock.json
index 5f65a1947..b0acf79d0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "GPL-3.0",
       "devDependencies": {
         "@mate-academy/eslint-config": "latest",
-        "@mate-academy/scripts": "^1.8.6",
+        "@mate-academy/scripts": "^2.1.3",
         "eslint": "^8.57.0",
         "eslint-plugin-jest": "^28.6.0",
         "eslint-plugin-node": "^11.1.0",
@@ -1467,10 +1467,11 @@
       }
     },
     "node_modules/@mate-academy/scripts": {
-      "version": "1.8.6",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.8.6.tgz",
-      "integrity": "sha512-b4om/whj4G9emyi84ORE3FRZzCRwRIesr8tJHXa8EvJdOaAPDpzcJ8A0sFfMsWH9NUOVmOwkBtOXDu5eZZ00Ig==",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-2.1.3.tgz",
+      "integrity": "sha512-a07wHTj/1QUK2Aac5zHad+sGw4rIvcNl5lJmJpAD7OxeSbnCdyI6RXUHwXhjF5MaVo9YHrJ0xVahyERS2IIyBQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@octokit/rest": "^17.11.2",
         "@types/get-port": "^4.2.0",
diff --git a/package.json b/package.json
index e8b974cfd..399a0cb0d 100644
--- a/package.json
+++ b/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": "^2.1.3",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",
diff --git a/src/transformStateWithClones.js b/src/transformStateWithClones.js
index 96d4f7e7e..adec17c80 100644
--- a/src/transformStateWithClones.js
+++ b/src/transformStateWithClones.js
@@ -7,7 +7,33 @@
  * @return {Object[]}
  */
 function transformStateWithClones(state, actions) {
-  // write code here
+  const history = [];
+  let currentState = { ...state };
+
+  for (const action of actions) {
+    if (action.type === 'clear') {
+      currentState = {};
+    }
+
+    if (action.type === 'addProperties') {
+      currentState = {
+        ...currentState,
+        ...action.extraData,
+      };
+    }
+
+    if (action.type === 'removeProperties') {
+      currentState = { ...currentState };
+
+      for (const key of action.keysToRemove) {
+        delete currentState[key];
+      }
+    }
+
+    history.push(currentState);
+  }
+
+  return history;
 }
 
 module.exports = transformStateWithClones;

From 9a0ab4ed7d1005e076882791ff4a58efa27f4ba9 Mon Sep 17 00:00:00 2001
From: Egor Fomin <egorfomin419@gmail.com>
Date: Sat, 3 Jan 2026 18:27:23 +0200
Subject: [PATCH 2/3] Solution

---
 src/transformStateWithClones.js | 39 ++++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/src/transformStateWithClones.js b/src/transformStateWithClones.js
index adec17c80..ba9e6d5b9 100644
--- a/src/transformStateWithClones.js
+++ b/src/transformStateWithClones.js
@@ -11,23 +11,32 @@ function transformStateWithClones(state, actions) {
   let currentState = { ...state };
 
   for (const action of actions) {
-    if (action.type === 'clear') {
-      currentState = {};
-    }
-
-    if (action.type === 'addProperties') {
-      currentState = {
-        ...currentState,
-        ...action.extraData,
-      };
-    }
+    switch (action.type) {
+      case 'clear':
+        currentState = {};
+        break;
+
+      case 'addProperties':
+        currentState = {
+          ...currentState,
+          ...action.extraData,
+        };
+        break;
+
+      case 'removeProperties': {
+        const nextState = { ...currentState };
+
+        for (const key of action.keysToRemove) {
+          delete nextState[key];
+        }
+
+        currentState = nextState;
+        break;
+      }
 
-    if (action.type === 'removeProperties') {
-      currentState = { ...currentState };
+      default:
 
-      for (const key of action.keysToRemove) {
-        delete currentState[key];
-      }
+        break;
     }
 
     history.push(currentState);

From d5f132cff596cb956543a5e64b2c62479816ffe6 Mon Sep 17 00:00:00 2001
From: Egor Fomin <egorfomin419@gmail.com>
Date: Sat, 3 Jan 2026 18:31:13 +0200
Subject: [PATCH 3/3] Solution

---
 src/transformStateWithClones.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/transformStateWithClones.js b/src/transformStateWithClones.js
index ba9e6d5b9..3ec595e70 100644
--- a/src/transformStateWithClones.js
+++ b/src/transformStateWithClones.js
@@ -35,11 +35,10 @@ function transformStateWithClones(state, actions) {
       }
 
       default:
-
         break;
     }
 
-    history.push(currentState);
+    history.push({ ...currentState });
   }
 
   return history;