test: add plugin event order spec (#13802)

tests/playwright-test/plugins.spec.ts

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import fs from 'fs';
+import { test, expect } from './playwright-test-fixtures';
+
+test('event order', async ({ runInlineTest }, testInfo) => {
+  const log = testInfo.outputPath('logs.txt');
+  const result = await runInlineTest({
+    'log.ts': `
+            import { appendFileSync } from 'fs';
+            const log = (...args) => appendFileSync('${log}', args.join(' ') + '\\n');
+            export default log;
+        `,
+    'test.spec.ts': `
+          import log from './log';
+          const { test } = pwt;
+          test('it works', async ({baseURL}) => {
+            log('baseURL', baseURL);
+          });
+        `,
+    'playwright.config.ts': `
+          import { myPlugin } from './plugin.ts';
+          module.exports = {
+            plugins: [
+                myPlugin('a'),
+                myPlugin('b'),
+            ],
+            globalSetup: 'globalSetup.ts',
+            globalTeardown: 'globalTeardown.ts',
+          };
+        `,
+    'globalSetup.ts': `
+          import log from './log';
+          const setup = () => log('globalSetup');
+          export default setup;
+        `,
+    'globalTeardown.ts': `
+          const teardown = () => log('globalTeardown');
+          export default teardown;
+        `,
+    'plugin.ts': `
+          import log from './log';
+          export const myPlugin = (name: string) => ({
+            configure: async (config) => { config.use = (config.use || {}); config.use.baseURL = (config.use.baseURL || '') + name + ' | '; },
+            setup: async () => log(name, 'setup'),
+            teardown: async () => log(name, 'teardown'),
+          });
+        `,
+  });
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(1);
+  const logLines = await fs.promises.readFile(log, 'utf8');
+  expect(logLines.split('\n')).toEqual([
+    'a setup',
+    'b setup',
+    'globalSetup',
+    'baseURL a | b | ',
+    'b teardown',
+    'a teardown',
+    '',
+  ]);
+});