fix(route): don't get stalled by "runBeforeUnload" (microsoft#38748)

Author: Skn0tt

packages/playwright-core/src/client/page.ts

@@ -631,7 +631,8 @@ export class Page extends ChannelOwner<channels.PageChannel> implements api.Page
 
   async close(options: { runBeforeUnload?: boolean, reason?: string } = {}) {
     this._closeReason = options.reason;
-    this._closeWasCalled = true;
+    if (!options.runBeforeUnload)
+      this._closeWasCalled = true;
     try {
       if (this._ownedContext)
         await this._ownedContext.close();

tests/page/page-route.spec.ts

@@ -1069,3 +1069,25 @@ it('should be able to intercept every navigation to a page controlled by service
   await page.goto(URL);
   expect(interceptions).toBe(2);
 });
+
+it('does not get stalled by beforeUnload', { annotation: { type: 'issue', description: 'https://github.com/microsoft/playwright/issues/38731' } }, async ({ page, server }) => {
+  await page.goto(server.HELLO_WORLD);
+
+  await page.evaluate(() => {
+    window.addEventListener('beforeunload', event => {
+      event.preventDefault();
+    });
+  });
+  page.on('dialog', dialog => dialog.dismiss());
+
+  // We have to interact with a page so that 'beforeunload' handlers
+  // fire.
+  await page.click('body');
+
+  await page.route('**/api', route => route.fulfill({ status: 200, body: 'ok' }));
+  await page.evaluate(async () => fetch(new URL('/api', window.location.href)));
+
+  await page.close({ runBeforeUnload: true });
+
+  await page.evaluate(async () => fetch(new URL('/api', window.location.href)));
+});