Add pull request checks

.github/workflows/checks.yml

@@ -0,0 +1,26 @@
+name: Pull request checks
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  run_tests:
+    name: Run tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout branch
+        uses: actions/checkout@v3
+
+      - name: Install Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.8'
+
+      - name: Install Python dependencies
+        uses: py-actions/py-dependency-install@v4
+
+      - name: Run tests
+        run: |
+          python -m doctest -o IGNORE_EXCEPTION_DETAIL -f tests/tests.txt

test.sh

@@ -7,4 +7,4 @@ source venv/bin/activate
 python -m pip install -U pip setuptools
 python -m pip install -r requirements.txt
 
-python -m doctest -o IGNORE_EXCEPTION_DETAIL -f tests/tests.txt || exit 1
+python -m doctest -o IGNORE_EXCEPTION_DETAIL -f tests/tests.txt