[TEST] Add test workflow

.github/workflows/test.yml

@@ -0,0 +1,84 @@
+name: Test
+
+on:
+  push:
+    branches:
+    - main-test
+    - v*-branch
+  pull_request:
+    branches:
+    - main-test
+    - v*-branch
+  workflow_call:
+
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    name: Test (Python ${{ matrix.target.python }})
+    runs-on: ${{ matrix.target.builder }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        target:
+        # Python 3.6
+        - python: '3.6'
+          builder: ubuntu-22.04
+        # Python 3.7
+        - python: '3.7'
+          builder: ubuntu-22.04
+        # Python 3.8
+        - python: '3.8'
+          builder: ubuntu-22.04
+        # Python 3.9
+        - python: '3.9'
+          builder: ubuntu-22.04
+        # Python 3.10
+        - python: '3.10'
+          builder: ubuntu-22.04
+        # Python 3.11
+        - python: '3.11'
+          builder: ubuntu-22.04
+        # Python 3.12
+        - python: '3.12'
+            builder: ubuntu-22.04
+
+    steps:
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.target.python }}
+
+    - name: Check Python version
+      run: |
+        set -x
+        python --version
+        pip --version
+        python -c "import platform; print(platform.architecture())"
+
+    - name: Install Python dependencies
+      run: |
+        pip install --user setuptools wheel
+
+    - name: Check out Linux source code
+      uses: actions/checkout@v4
+      with:
+        repository: torvalds/linux
+        ref: v5.4
+
+    - name: Check out Kconfiglib source code
+      uses: actions/checkout@v4
+      with:
+        path: Kconfiglib
+
+    - name: Apply Linux Kconfig Makefile patch
+      run: |
+        git apply Kconfiglib/makefile.patch
+
+    - name: Run testsuite
+      run: |
+        python Kconfiglib/testsuite.py
+        # Kconfiglib/tests/reltest