Deflake two other tests

Bug: 361078921
Change-Id: If4fd0677edcdc46c4f92d411c49e80932e55d62d
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6257648
Auto-Submit: Alex Rudenko <[email protected]>
Commit-Queue: Alex Rudenko <[email protected]>
Reviewed-by: Nikolay Vitkov <[email protected]>
Commit-Queue: Nikolay Vitkov <[email protected]>

Author: OrKoN

test/e2e/extensions/debugger-language-plugins_test.ts

@@ -11,6 +11,7 @@ import {
   $$,
   assertNotNullOrUndefined,
   click,
+  drainFrontendTaskQueue,
   getAllTextContents,
   getBrowserAndPages,
   getDevToolsFrontendHostname,
@@ -493,6 +494,8 @@ describe('The Debugger Language Plugins', () => {
     await goToResource('sources/wasm/unreachable.html');
     await addDummyExternalDWARFInfo('unreachable.wasm');
     await waitFor(RESUME_BUTTON);
+    // TODO: it should actually wait for rendering to finish.
+    await drainFrontendTaskQueue();
 
     // Call stack shows inline function names and source locations.
     const funcNames = await getCallFrameNames();

test/e2e/helpers/changes-helpers.ts

@@ -2,7 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import {$$, getBrowserAndPages, goToResource, waitFor, waitForFunction} from '../../shared/helper.js';
+import {
+  $$,
+  drainFrontendTaskQueue,
+  getBrowserAndPages,
+  goToResource,
+  waitFor,
+  waitForFunction
+} from '../../shared/helper.js';
 
 import {openCommandMenu} from './quick_open-helpers.js';
 import {
@@ -21,7 +28,11 @@ export async function openChangesPanelAndNavigateTo(testName: string) {
 
   await openCommandMenu();
   await frontend.keyboard.type('changes');
+  // TODO: it should actually wait for rendering to finish.
+  await drainFrontendTaskQueue();
   await frontend.keyboard.press('Enter');
+  // TODO: it should actually wait for rendering to finish.
+  await drainFrontendTaskQueue();
 
   await waitFor(COPY_CHANGES_SELECTOR);
   await expectVeEvents([