refactor(test runner): use closeReason from server

Currently, when the server closes a BrowerContext/Page (e.g. because the page crashed), there's no way for the server to pass back a _closeReason. The client will always show the fallback error message 'Target page, context or browser has been closed'.

This PR makes the server send back the close reason as part of a new `reason` parameter on the `close` event, allowing both client- and server-originating closes to have a specific reason.

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

@@ -88,7 +88,7 @@ export class BrowserContext extends ChannelOwner<channels.BrowserContextChannel>
     this.clock = new Clock(this);
 
     this._channel.on('bindingCall', ({ binding }) => this._onBinding(BindingCall.from(binding)));
-    this._channel.on('close', () => this._onClose());
+    this._channel.on('close', ({ reason }) => this._onClose(reason));
     this._channel.on('page', ({ page }) => this._onPage(Page.from(page)));
     this._channel.on('route', ({ route }) => this._onRoute(network.Route.from(route)));
     this._channel.on('backgroundPage', ({ page }) => {
@@ -431,7 +431,8 @@ export class BrowserContext extends ChannelOwner<channels.BrowserContextChannel>
     return CDPSession.from(result.session);
   }
 
-  _onClose() {
+  _onClose(reason?: string) {
+    this._closeReason = reason;
     if (this._browser)
       this._browser._contexts.delete(this);
     this._browserType?._contexts?.delete(this);
@@ -447,7 +448,6 @@ export class BrowserContext extends ChannelOwner<channels.BrowserContextChannel>
   async close(options: { reason?: string } = {}): Promise<void> {
     if (this._closeWasCalled)
       return;
-    this._closeReason = options.reason;
     this._closeWasCalled = true;
     await this._wrapApiCall(async () => {
       await this.request.dispose(options);

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

@@ -129,7 +129,7 @@ export class Page extends ChannelOwner<channels.PageChannel> implements api.Page
     this._opener = Page.fromNullable(initializer.opener);
 
     this._channel.on('bindingCall', ({ binding }) => this._onBinding(BindingCall.from(binding)));
-    this._channel.on('close', () => this._onClose());
+    this._channel.on('close', ({ reason }) => this._onClose(reason));
     this._channel.on('crash', () => this._onCrash());
     this._channel.on('download', ({ url, suggestedFilename, artifact }) => {
       const artifactObject = Artifact.from(artifact);
@@ -218,8 +218,9 @@ export class Page extends ChannelOwner<channels.PageChannel> implements api.Page
     this.emit(Events.Page.Worker, worker);
   }
 
-  _onClose() {
+  _onClose(reason?: string) {
     this._closed = true;
+    this._closeReason = reason;
     this._browserContext._pages.delete(this);
     this._browserContext._backgroundPages.delete(this);
     this._disposeHarRouters();
@@ -598,11 +599,10 @@ export class Page extends ChannelOwner<channels.PageChannel> implements api.Page
   }
 
   async close(options: { runBeforeUnload?: boolean, reason?: string } = {}) {
-    this._closeReason = options.reason;
     this._closeWasCalled = true;
     try {
       if (this._ownedContext)
-        await this._ownedContext.close();
+        await this._ownedContext.close(options);
       else
         await this._channel.close(options);
     } catch (e) {

packages/playwright-core/src/protocol/validator.ts

@@ -815,7 +815,9 @@ scheme.BrowserContextConsoleEvent = tObject({
   }),
   page: tChannel(['Page']),
 });
-scheme.BrowserContextCloseEvent = tOptional(tObject({}));
+scheme.BrowserContextCloseEvent = tObject({
+  reason: tOptional(tString),
+});
 scheme.BrowserContextDialogEvent = tObject({
   dialog: tChannel(['Dialog']),
 });
@@ -1045,7 +1047,9 @@ scheme.PageInitializer = tObject({
 scheme.PageBindingCallEvent = tObject({
   binding: tChannel(['BindingCall']),
 });
-scheme.PageCloseEvent = tOptional(tObject({}));
+scheme.PageCloseEvent = tObject({
+  reason: tOptional(tString),
+});
 scheme.PageCrashEvent = tOptional(tObject({}));
 scheme.PageDownloadEvent = tObject({
   url: tString,

packages/playwright-core/src/server/browserContext.ts

@@ -252,7 +252,7 @@ export abstract class BrowserContext extends SdkObject {
     if (this._isPersistentContext)
       this.onClosePersistent();
     this._closePromiseFulfill!(new Error('Context closed'));
-    this.emit(BrowserContext.Events.Close);
+    this.emit(BrowserContext.Events.Close, { reason: this._closeReason });
   }
 
   // BrowserContext methods.

packages/playwright-core/src/server/dispatchers/browserContextDispatcher.ts

@@ -82,8 +82,8 @@ export class BrowserContextDispatcher extends Dispatcher<BrowserContext, channel
     this.addObjectListener(BrowserContext.Events.Page, page => {
       this._dispatchEvent('page', { page: PageDispatcher.from(this, page) });
     });
-    this.addObjectListener(BrowserContext.Events.Close, () => {
+    this.addObjectListener(BrowserContext.Events.Close, params => {
-      this._dispatchEvent('close');
+      this._dispatchEvent('close', params);
       this._dispose();
     });
     this.addObjectListener(BrowserContext.Events.PageError, (error: Error, page: Page) => {

packages/playwright-core/src/server/dispatchers/pageDispatcher.ts

@@ -70,8 +70,8 @@ export class PageDispatcher extends Dispatcher<Page, channels.PageChannel, Brows
     this.adopt(mainFrame);
 
     this._page = page;
-    this.addObjectListener(Page.Events.Close, () => {
+    this.addObjectListener(Page.Events.Close, params => {
-      this._dispatchEvent('close');
+      this._dispatchEvent('close', params);
       this._dispose();
     });
     this.addObjectListener(Page.Events.Crash, () => this._dispatchEvent('crash'));

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

@@ -221,7 +221,7 @@ export class Page extends SdkObject {
     // in that case we fire another Close event to ensure that each reported Page will have
     // corresponding Close event after it is reported on the context.
     if (this.isClosed())
-      this.emit(Page.Events.Close);
+      this.emit(Page.Events.Close, { reason: this._closeReason });
     else
       this.instrumentation.onPageOpen(this);
   }
@@ -280,7 +280,7 @@ export class Page extends SdkObject {
     this._frameThrottler.dispose();
     assert(this._closedState !== 'closed', 'Page closed twice');
     this._closedState = 'closed';
-    this.emit(Page.Events.Close);
+    this.emit(Page.Events.Close, { reason: this._closeReason });
     this._closedPromise.resolve();
     this.instrumentation.onPageClose(this);
     this.openScope.close(new TargetClosedError());

packages/protocol/src/channels.ts

@@ -1545,7 +1545,9 @@ export type BrowserContextConsoleEvent = {
   },
   page: PageChannel,
 };
-export type BrowserContextCloseEvent = {};
+export type BrowserContextCloseEvent = {
+  reason?: string,
+};
 export type BrowserContextDialogEvent = {
   dialog: DialogChannel,
 };
@@ -1963,7 +1965,9 @@ export interface PageChannel extends PageEventTarget, EventTargetChannel {
 export type PageBindingCallEvent = {
   binding: BindingCallChannel,
 };
-export type PageCloseEvent = {};
+export type PageCloseEvent = {
+  reason?: string,
+};
 export type PageCrashEvent = {};
 export type PageDownloadEvent = {
   url: string,

packages/protocol/src/protocol.yml

@@ -1285,6 +1285,8 @@ BrowserContext:
         page: Page
 
     close:
+      parameters:
+        reason: string?
 
     dialog:
       parameters:
@@ -1737,6 +1739,8 @@ Page:
         binding: BindingCall
 
     close:
+      parameters:
+        reason: string?
 
     crash: