Run tests in CI.

Signed-off-by: Daira Emma Hopwood <daira@jacaranda.org>

.github/workflows/flake8.yml

@@ -10,6 +10,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install gnome-keyring
+        # https://github.com/python-poetry/poetry/issues/2692
         run: sudo apt-get install gnome-keyring
 
       - name: Install poetry

.github/workflows/tests.yml

@@ -0,0 +1,24 @@
+name: tests
+
+on: pull_request
+
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install gnome-keyring
+        # https://github.com/python-poetry/poetry/issues/2692
+        run: sudo apt-get install gnome-keyring
+
+      - name: Install poetry
+        run: pip install --user poetry
+
+      - name: Install dependencies
+        run: poetry install --no-root
+
+      - name: Run tests
+        # -p '[a-z]*.py' avoids running tests from __init__.py files twice.
+        run: poetry run python -m unittest discover -s simtfl -t . -p '[a-z]*.py' --verbose --buffer