Add Playwright E2E integration tests for cart state management

album-viewer/.gitignore

@@ -22,3 +22,8 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+
+# Playwright
+test-results/
+playwright-report/
+playwright/.cache/

album-viewer/package.json

@@ -7,14 +7,19 @@
     "build": "vue-tsc && vite build",
     "preview": "vite preview",
     "serve": "vite preview",
-    "type-check": "vue-tsc --noEmit"
+    "type-check": "vue-tsc --noEmit",
+    "test:e2e": "playwright test",
+    "test:e2e:ui": "playwright test --ui",
+    "test:e2e:debug": "playwright test --debug",
+    "test:e2e:report": "playwright show-report"
   },
   "dependencies": {
     "axios": "^1.6.0",
     "vue": "^3.4.0"
   },
   "devDependencies": {
-    "@types/node": "^24.3.0",
+    "@playwright/test": "^1.56.1",
+    "@types/node": "^24.10.0",
     "@vitejs/plugin-vue": "^5.0.0",
     "@vue/tsconfig": "^0.8.1",
     "typescript": "^5.9.2",

album-viewer/playwright.config.ts

@@ -0,0 +1,50 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+export default defineConfig({
+  testDir: './tests/e2e',
+  /* 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://localhost:3001',
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+    screenshot: 'only-on-failure',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  webServer: [
+    {
+      command: 'cd ../albums-api && npm run dev',
+      url: 'http://localhost:3000/albums',
+      reuseExistingServer: !process.env.CI,
+      timeout: 120 * 1000,
+    },
+    {
+      command: 'npm run dev',
+      url: 'http://localhost:3001',
+      reuseExistingServer: !process.env.CI,
+      timeout: 120 * 1000,
+    },
+  ],
+});