Add GitHub Actions CI/CD pipeline with comprehensive test coverage

.github/workflows/test.yml

@@ -0,0 +1,81 @@
+name: Tests
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python-version }}
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.0'
+
+    - name: Set up PHP
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: '8.1'
+        tools: composer
+
+    - name: Install system dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y graphviz graphviz-dev locales
+        sudo locale-gen en_US.UTF-8
+
+    - name: Set environment variables
+      run: |
+        echo "LANG=en_US.UTF-8" >> $GITHUB_ENV
+        echo "LC_ALL=en_US.UTF-8" >> $GITHUB_ENV
+
+    - name: Install Python dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements_dev.txt
+
+    - name: Install JavaScript dependencies
+      run: |
+        cd code2flow
+        npm install acorn
+
+    - name: Install Ruby dependencies
+      run: |
+        gem install parser
+
+    - name: Install PHP dependencies
+      run: |
+        cd code2flow
+        COMPOSER_AUTH='{}' composer require nikic/php-parser "^4.10" --no-interaction
+
+    - name: Run tests with coverage
+      run: |
+        pytest --cov-report=xml --cov-report=term --cov=code2flow tests/
+
+    - name: Upload coverage to Codecov
+      if: matrix.python-version == '3.11'
+      uses: codecov/codecov-action@v3
+      with:
+        file: ./coverage.xml
+        flags: unittests
+        name: codecov-umbrella
+        fail_ci_if_error: false

.gitignore

@@ -3,9 +3,15 @@ __pycache__
 out.*
 .coverage*
 htmlcov
-build/
+.build/
 *.egg-info
 dist
 composer.json
 composer.lock
 vendor
+node_modules/
+package-lock.json
+package.json
+coverage.xml
+.pytest_cache/
+*.pyc

code2flow/engine.py

@@ -838,7 +838,7 @@ def main(sys_argv=None):
     parser.add_argument(
         '--version', action='version', version='%(prog)s ' + VERSION)
 
-    sys_argv = sys_argv or sys.argv[1:]
+    sys_argv = sys_argv if sys_argv is not None else sys.argv[1:]
     args = parser.parse_args(sys_argv)
     level = logging.INFO
     if args.verbose and args.quiet: