feat(7): Angular dev server

README.md

@@ -29,6 +29,42 @@ ng e2e --ui
 
 For a list of accepted arguments, use `ng e2e --help`. If you need more options and control on the CLI, the best solution is to use `npx playwright test` directly.
 
+### Run an Angular dev server
+If a `devServerTarget` option is specified, the builder will launch an Angular server and will set `PLAYWRIGHT_TEST_BASE_URL` environment variable automatically.
+
+```json title="angular.json"
+        "e2e": {
+          "builder": "playwright-ng-schematics:playwright",
+          "options": {
+            "devServerTarget": "my-app:serve",
+            "ui": true
+          },
+          "configurations": {
+            "production": {
+              "devServerTarget": "my-app:serve:production"
+            }
+          }
+        }
+```
+
+You still can make use of Playwright's `baseURL` option and mix it with `PLAYWRIGHT_TEST_BASE_URL` env variable.  
+The example below has projects using `PLAYWRIGHT_TEST_BASE_URL` (set by `devServerTarget`) or other base URL.
+
+```ts title="playwright.config.ts"
+  // ...
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'], baseURL: process.env['PLAYWRIGHT_TEST_BASE_URL'] },
+    },
+
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'], baseURL: 'http://example.com' },
+    },
+  ]
+```
+
 ## Create a test file
 
 Create a new empty test

src/builders/playwright/index.ts

@@ -2,11 +2,14 @@ import { spawn } from 'node:child_process';
 import {
   type BuilderContext,
   type BuilderOutput,
+  type BuilderRun,
   createBuilder,
+  targetFromTargetString,
 } from '@angular-devkit/architect';
 import type { JsonObject } from '@angular-devkit/core';
 
 interface Options extends JsonObject {
+  devServerTarget: string;
   debug: boolean;
   trace: string;
   'update-snapshots': boolean;
@@ -30,12 +33,33 @@ function buildArgs(options: Options) {
   return args;
 }
 
-async function startPlaywrightTest(options: Options) {
+async function startDevServer(
+  context: BuilderContext,
+  devServerTarget: string,
+): Promise<BuilderRun> {
+  const target = targetFromTargetString(devServerTarget);
+  const server = await context.scheduleTarget(target, {});
+
+  return server;
+}
+
+async function startPlaywrightTest(options: Options, baseURL: string) {
+  // PLAYWRIGHT_TEST_BASE_URL is actually a non-documented env variable used 
+  // by Playwright Test.
+  // Its usage in playwright.config.ts is to clarify that it can be overriden.
+  let env = {};
+  if (baseURL) {
+    env = {
+      PLAYWRIGHT_TEST_BASE_URL: baseURL,
+    };
+  }
+
   return new Promise((resolve, reject) => {
     const childPorcess = spawn('npx playwright test', buildArgs(options), {
       cwd: process.cwd(),
       stdio: 'inherit',
       shell: true,
+      env,
     });
 
     childPorcess.on('exit', (exitCode) => {
@@ -49,13 +73,26 @@ async function startPlaywrightTest(options: Options) {
 
 async function runE2E(
   options: Options,
-  _context: BuilderContext,
+  context: BuilderContext,
 ): Promise<BuilderOutput> {
+  let server: BuilderRun | undefined = undefined;
+  let baseURL = '';
+
   try {
-    await startPlaywrightTest(options);
+    if (options.devServerTarget) {
+      server = await startDevServer(context, options.devServerTarget);
+      const result = await server.result;
+      baseURL = result.baseUrl;
+    }
+
+    await startPlaywrightTest(options, baseURL);
     return { success: true };
   } catch (error) {
     return { success: false };
+  } finally {
+    if (server) {
+      server.stop();
+    }
   }
 }
 

src/builders/playwright/schema.json

@@ -4,6 +4,10 @@
   "description": "Playwright builder options",
   "type": "object",
   "properties": {
+    "devServerTarget": {
+      "description": "Dev server target to run tests against",
+      "type": "string"
+    },
     "debug": {
       "description": "Run tests with Playwright Inspector",
       "type": "boolean"

src/schematics/ng-add/files/playwright.config.ts

@@ -24,7 +24,7 @@ export default defineConfig({
   /* 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:4200',
+    baseURL: process.env['PLAYWRIGHT_TEST_BASE_URL'] ?? 'http://localhost:4200',
 
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: 'on-first-retry',
@@ -67,12 +67,4 @@ export default defineConfig({
     //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
     // },
   ],
-
-  /* Run your local dev server before starting the tests */
-  webServer: {
-    command: 'npm run start',
-    url: 'http://localhost:4200',
-    reuseExistingServer: !process.env['CI'],
-    stdout: 'pipe',
-  },
 });

src/schematics/ng-add/index.ts

@@ -41,6 +41,14 @@ function updateAngular(tree: Tree, context: SchematicContext) {
   for (const projectName of Object.keys(json.projects)) {
     json.projects[projectName].architect.e2e = {
       builder: 'playwright-ng-schematics:playwright',
+      options: {
+        devServerTarget: `${projectName}:serve`,
+      },
+      configurations: {
+        production: {
+          devServerTarget: `${projectName}:serve:production`,
+        },
+      },
     };
   }
   tree.overwrite('angular.json', JSON.stringify(json, null, 2));