Add boilerplate for Playwright tests

examples/accident-counter/.gitignore

@@ -0,0 +1,5 @@
+node_modules/
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/

examples/accident-counter/package.json

@@ -19,9 +19,11 @@
   },
   "homepage": "https://github.com/stevekinney/testing-javascript#readme",
   "devDependencies": {
+    "@playwright/test": "^1.47.2",
     "@testing-library/dom": "^10.4.0",
     "@testing-library/jest-dom": "^6.5.0",
     "@testing-library/react": "^16.0.1",
+    "@types/node": "^22.7.4",
     "@types/react": "^18.3.6",
     "@types/react-dom": "^18.3.0",
     "@types/testing-library__jest-dom": "^5.14.9",

examples/accident-counter/playwright.config.js

@@ -0,0 +1,78 @@
+// @ts-check
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config({ path: path.resolve(__dirname, '.env') });
+
+/**
+ * @see https://playwright.dev/docs/test-configuration
+ */
+export default defineConfig({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    // baseURL: 'http://127.0.0.1:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: { ...devices['Pixel 5'] },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: { ...devices['iPhone 12'] },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    // },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   url: 'http://127.0.0.1:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});

examples/accident-counter/src/counter.tsx

@@ -1,3 +1,4 @@
+import React from 'react';
 import { useReducer, useEffect } from 'react';
 import { reducer } from './reducer';
 
@@ -6,10 +7,11 @@ export const Counter = () => {
   const unit = state.count === 1 ? 'day' : 'days';
 
   useEffect(() => {
-    window.document.title = `${state.count} ${unit}`;
+    window.document.title = `${state.count} ${unit} — Accident Counter`;
   }, [state.count]);
 
   return (
+    <main className="flex h-screen items-center justify-center">
       <div className="space-y-8 rounded-md border border-slate-400 bg-white p-8 text-center shadow-lg">
         <div className="space-y-4">
           <div data-testid="counter-count" className="text-8xl font-semibold">
@@ -38,5 +40,6 @@ export const Counter = () => {
           </button>
         </div>
       </div>
+    </main>
   );
 };

examples/accident-counter/tests/counter.spec.js

@@ -0,0 +1,2 @@
+import { test, expect } from '@playwright/test';
+import { createServer } from 'vite';

package-lock.json

@@ -32,9 +32,11 @@
       "version": "1.0.0",
       "license": "MIT",
       "devDependencies": {
+        "@playwright/test": "^1.47.2",
         "@testing-library/dom": "^10.4.0",
         "@testing-library/jest-dom": "^6.5.0",
         "@testing-library/react": "^16.0.1",
+        "@types/node": "^22.7.4",
         "@types/react": "^18.3.6",
         "@types/react-dom": "^18.3.0",
         "@types/testing-library__jest-dom": "^5.14.9",
@@ -984,6 +986,22 @@
         "node": ">=14"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.47.2",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.47.2.tgz",
+      "integrity": "sha512-jTXRsoSPONAs8Za9QEQdyjFn+0ZQFjCiIztAIF6bi1HqhBzG9Ma7g1WotyiGqFSBRZjIEqMdT8RUlbk1QVhzCQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.47.2"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@polka/url": {
       "version": "1.0.0-next.25",
       "dev": true,
@@ -1573,7 +1591,9 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "22.5.5",
+      "version": "22.7.4",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.7.4.tgz",
+      "integrity": "sha512-y+NPi1rFzDs1NdQHHToqeiX2TIS79SWEAw9GYhkkx8bD0ChpfqC+n2j5OXOCpzfojBEBt6DnEnnG9MY0zk1XLg==",
       "devOptional": true,
       "license": "MIT",
       "dependencies": {
@@ -4209,6 +4229,53 @@
         "node": ">= 6"
       }
     },
+    "node_modules/playwright": {
+      "version": "1.47.2",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.47.2.tgz",
+      "integrity": "sha512-nx1cLMmQWqmA3UsnjaaokyoUpdVaaDhJhMoxX2qj3McpjnsqFHs516QAKYhqHAgOP+oCFTEOCOAaD1RgD/RQfA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.47.2"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.47.2",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.47.2.tgz",
+      "integrity": "sha512-3JvMfF+9LJfe16l7AbSmU555PaTl2tPyQsVInqm3id16pdDfvZ8TTZ/pyzmkbDrZTQefyzU7AIHlZqQnxpqHVQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/playwright/node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.4.45",
       "funding": [