feat(driver): report backend state (#16477)

packages/playwright-core/src/cli/driver.ts

@@ -90,6 +90,38 @@ class ProtocolHandler {
 
   constructor(playwright: Playwright) {
     this._playwright = playwright;
+    playwright.instrumentation.addListener({
+      onPageOpen: () => this._sendSnapshot(),
+      onPageNavigated: () => this._sendSnapshot(),
+      onPageClose: () => this._sendSnapshot(),
+    }, null);
+  }
+
+  private _sendSnapshot() {
+    const browsers = [];
+    for (const browser of this._playwright.allBrowsers()) {
+      const b = {
+        name: browser.options.name,
+        guid: browser.guid,
+        contexts: [] as any[]
+      };
+      browsers.push(b);
+      for (const context of browser.contexts()) {
+        const c = {
+          guid: context.guid,
+          pages: [] as any[]
+        };
+        b.contexts.push(c);
+        for (const page of context.pages()) {
+          const p = {
+            guid: page.guid,
+            url: page.mainFrame().url()
+          };
+          c.pages.push(p);
+        }
+      }
+    }
+    process.send!({ method: 'browsersChanged', params: { browsers } });
   }
 
   async resetForReuse() {

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

@@ -239,7 +239,7 @@ export class FrameManager {
 
     frame._onClearLifecycle();
     const navigationEvent: NavigationEvent = { url, name, newDocument: frame._currentDocument, isPublic: true };
-    frame.emit(Frame.Events.InternalNavigation, navigationEvent);
+    this._fireInternalFrameNavigation(frame, navigationEvent);
     if (!initial) {
       debugLogger.log('api', `  navigated to "${url}"`);
       this._page.frameNavigatedToNewDocument(frame);
@@ -254,7 +254,7 @@ export class FrameManager {
       return;
     frame._url = url;
     const navigationEvent: NavigationEvent = { url, name: frame._name, isPublic: true };
-    frame.emit(Frame.Events.InternalNavigation, navigationEvent);
+    this._fireInternalFrameNavigation(frame, navigationEvent);
     debugLogger.log('api', `  navigated to "${url}"`);
   }
 
@@ -272,7 +272,7 @@ export class FrameManager {
       isPublic: !(documentId && frame._redirectedNavigations.has(documentId)),
     };
     frame.setPendingDocument(undefined);
-    frame.emit(Frame.Events.InternalNavigation, navigationEvent);
+    this._fireInternalFrameNavigation(frame, navigationEvent);
   }
 
   frameDetached(frameId: string) {
@@ -462,6 +462,12 @@ export class FrameManager {
     if (ws)
       ws.error(errorMessage);
   }
+
+  private _fireInternalFrameNavigation(frame: Frame, event: NavigationEvent) {
+    frame.emit(Frame.Events.InternalNavigation, event);
+    if (event.isPublic && !frame.parentFrame())
+      frame.instrumentation.onPageNavigated(frame._page, event.url);
+  }
 }
 
 export class Frame extends SdkObject {

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

@@ -63,6 +63,7 @@ export interface Instrumentation {
   onAfterCall(sdkObject: SdkObject, metadata: CallMetadata): Promise<void>;
   onEvent(sdkObject: SdkObject, metadata: CallMetadata): void;
   onPageOpen(page: Page): void;
+  onPageNavigated(page: Page, url: string): void;
   onPageClose(page: Page): void;
   onBrowserOpen(browser: Browser): void;
   onBrowserClose(browser: Browser): void;
@@ -75,6 +76,7 @@ export interface InstrumentationListener {
   onAfterCall?(sdkObject: SdkObject, metadata: CallMetadata): Promise<void>;
   onEvent?(sdkObject: SdkObject, metadata: CallMetadata): void;
   onPageOpen?(page: Page): void;
+  onPageNavigated?(page: Page, url: string): void;
   onPageClose?(page: Page): void;
   onBrowserOpen?(browser: Browser): void;
   onBrowserClose?(browser: Browser): void;