Start a test suite so the guessing can be test-driven

Refs #31

.github/workflows/ci.yml

@@ -142,6 +142,28 @@ jobs:
       - name: 'Run the linter'
         run: npx eslint . --max-warnings 0
 
+  test:
+    name: 'test'
+    runs-on: ubuntu-22.04
+    timeout-minutes: 30
+    if: github.event_name != 'schedule'
+
+    steps:
+      - name: 'Checkout code'
+        uses: actions/[email protected]
+
+      - name: 'Set up Node.js'
+        uses: actions/[email protected]
+        with:
+          node-version-file: package.json
+          cache: ${{ !env.ACT && 'npm' || '' }}
+
+      - name: 'Install dependencies'
+        run: npm ci
+
+      - name: 'Run the tests'
+        run: npx vitest run
+
   typecheck:
     name: 'Typecheck'
     runs-on: ubuntu-22.04
@@ -175,6 +197,7 @@ jobs:
       - build-image
       - format
       - lint
+      - test
       - typecheck
 
     steps:

Makefile

@@ -1,4 +1,4 @@
-.PHONY: build-image check format lint prod start typecheck
+.PHONY: build-image check format lint prod start test typecheck
 
 CADDY_PASSWORD=letmein
 IMAGE_TAG=prereview-stats
@@ -19,14 +19,17 @@ build-image: .env node_modules
 	npx @dotenvx/dotenvx run -- npx observable build
 	docker build --target prod --tag ${IMAGE_TAG} .
 
-check: format lint typecheck
+check: format lint test typecheck
 
 format: node_modules
 	npx prettier --ignore-unknown --check '**'
 
 lint: node_modules
 	npx eslint . --max-warnings 0
 
+test: node_modules
+	npx vitest run
+
 typecheck: node_modules
 	npx tsc --noEmit