Introduce testing

.eslintrc.json

@@ -1,7 +1,11 @@
 {
   "env": {
     "browser": true,
-    "es2021": true
+    "es2021": true,
+    "jest": true
+  },
+  "globals": {
+    "page": true
   },
   "extends": [
     "airbnb-base",

.github/workflows/lint.yml

@@ -16,12 +16,15 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ env.NODE_VERSION }}
-  
+
       - name: Code Checkout
         uses: actions/checkout@v2
-  
+
       - name: Install Dependencies
         run: npm ci
-  
+
       - name: Code Linting
         run: npm run lint
+
+      - name: Tests
+        run: npm run test

integration/smoke.test.js

@@ -0,0 +1,12 @@
+// These tests assume that the server is running locally on port 3000 and the
+// test data is unchanged.
+describe.skip('basic integration', () => {
+  it('loads pages', async () => {
+    await page.goto('http://localhost:3000');
+    await expect(page.title()).resolves.toEqual('Latest bookmarks | Postmarks');
+    await page.locator('a[href="/bookmark/1"]').click();
+    await page.waitForNavigation();
+    await expect(page.title()).resolves.toEqual('Postmarks - Getting Started | Postmarks');
+    expect(await page.content()).toMatch('Some notes on setup and acknowledgements');
+  });
+});

jest.config.json

@@ -0,0 +1,4 @@
+{
+  "preset": "jest-puppeteer",
+  "transform": {}
+}