Add unit tests

.github/codecov.yml

@@ -0,0 +1,10 @@
+coverage:
+  status:
+    project:
+      default:
+        informational: true
+    patch:
+      default:
+        informational: true
+github_checks:
+  annotations: false

.github/workflows/ci.yaml

@@ -27,21 +27,20 @@ jobs:
       - name: Run linters
         run: tox run -e lint
 
-# TODO: re-enable after adding unit tests
-#  unit-test:
-#    name: Unit tests
-#    runs-on: ubuntu-latest
-#    timeout-minutes: 5
-#    steps:
-#      - name: Checkout
-#        uses: actions/checkout@v3
-#      - name: Install tox
-#        # TODO: Consider replacing with custom image on self-hosted runner OR pinning version
-#        run: python3 -m pip install tox
-#      - name: Run tests
-#        run: tox run -e unit
-#      - name: Upload Coverage to Codecov
-#        uses: codecov/codecov-action@v3
+  unit-test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install tox
+        # TODO: Consider replacing with custom image on self-hosted runner OR pinning version
+        run: python3 -m pip install tox
+      - name: Run tests
+        run: tox run -e unit
+      - name: Upload Coverage to Codecov
+        uses: codecov/codecov-action@v3
 
   lib-check:
     name: Check libraries
@@ -84,8 +83,7 @@ jobs:
     name: ${{ matrix.tox-environments }} | ${{ matrix.ubuntu-versions.series }}
     needs:
       - lint
-      # TODO: re-enable after adding unit tests
-      # - unit-test
+      - unit-test
       - build
     runs-on: ubuntu-latest
     timeout-minutes: 120