@@ -0,0 +1,26 @@
+name: Continuous Integration
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions: ['7.1', '7.2', '7.3', '7.4']
+    steps:
+    - uses: actions/checkout@v2
+    - name: Analysing source code
+      run: find ./src/ ./inc/ ./tests/ -type f -name '*.php' -print0 | xargs -0 -L 1 -P 4 -- php -l
+    - name: Validate composer.json and composer.lock
+      run: composer validate
+    - name: Install dependencies
+      run: composer install --prefer-dist --no-progress --no-suggest
+    - name: Setup PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php-versions }}
+    - name: PhpUnit
+      run: ./vendor/bin/phpunit
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+      if: failure()
@@ -8,5 +8,21 @@
       "name": "Anton Ukhanev",
       "email": "xedin.unknown@gmail.com"
     }
-  ]
+  ],
+  "require": {
+    "php": "^7.1"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^7.0 | ^8.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "WpOop\\WordPress\\": "src"
+    }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "WpOop\\WordPress\\Test\\Unit\\": "tests/unit"
+    }
+  }
 }