Add testing workflow

.github/workflows/standard.yaml

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+name: "Standard"
+run-name: ${{ github.run_number }} [${{ github.actor }}] on ${{ github.ref_name }}
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+  schedule:
+    - cron: '0 0 * * *' # Once a day at 12am UTC
+  workflow_dispatch:
+
+jobs:
+  # ----------------------------------------------------------------------
+  validate:
+    name: Validate
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        python_version:
+          - "3.12"
+          - "3.11"
+          - "3.10"
+
+    env:
+      COLUMNS: "200"
+      SIMULATE_TERMINAL_CAPABILITIES_SUPPORTS_COLORS: "1"
+      PYTHONIOENCODING: "UTF-8"
+
+    permissions: {}
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Test with pytest
+        run: |
+          pip install pytest pytest-cov
+          pytest tests/test_generation.py --doctest-modules --junitxml=junit/test-results.xml --cov=com --cov-report=xml --cov-report=html --subset-percentage 0.05

tests/conftest.py

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+import random
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--subset-percentage",
+        action="store",
+        default=None,
+        help="Specify the percentage of tests to run as a subset (e.g., 0.3 for 30%)",
+    )
+
+
+def pytest_collection_modifyitems(config, items):
+    subset_percentage = config.getoption("--subset-percentage")
+
+    # If the subset percentage is provided, apply it
+    if subset_percentage is not None:
+        subset_percentage = float(subset_percentage)
+
+        # Shuffle the test cases
+        random.shuffle(items)
+
+        # Calculate the number of tests to run based on percentage
+        subset_count = int(len(items) * subset_percentage)
+
+        # Select a subset of tests
+        items[:] = items[:subset_count]