Merge "ui: add test for CPU and thread funcgraph traces" into main

Author: LalitMaganti

test/data/ui-funcgraph.pftrace.sha256

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+4262c95bce220236289f70ec66f7c97b2133eefe6d380d09c6cc7217a41309c4

test/data/ui-screenshots/funcgraph_trace.test.ts/cpu-funcgraph/cpu-funcgraph.png.sha256

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+83a8d8d5c20c69bd5abaffdf9ec33f079f90f7617f7a81d8f79da7c4e3570c13

test/data/ui-screenshots/funcgraph_trace.test.ts/thread-funcgraph/thread-funcgraph.png.sha256

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+a25fb0bb6e777f524ef78b60fbe54421348bb9815630d3dee6720b09ed3030f0

ui/src/test/funcgraph_trace.test.ts

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+// Copyright (C) 2025 The Android Open Source Project
+//
+// 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 {test, Page} from '@playwright/test';
+import {PerfettoTestHelper} from './perfetto_ui_test_helper';
+
+test.describe.configure({mode: 'serial'});
+
+let pth: PerfettoTestHelper;
+let page: Page;
+
+test.beforeAll(async ({browser}, _testInfo) => {
+  page = await browser.newPage();
+  pth = new PerfettoTestHelper(page);
+  await pth.openTraceFile('ui-funcgraph.pftrace');
+});
+
+test('cpu funcgraph', async () => {
+  const grp = pth.locateTrack('CPU');
+  await grp.scrollIntoViewIfNeeded();
+  await pth.toggleTrackGroup(grp);
+  const funcgraphGrp = pth.locateTrack('CPU/Funcgraph', grp);
+  await funcgraphGrp.scrollIntoViewIfNeeded();
+  await pth.toggleTrackGroup(funcgraphGrp);
+  const funcgraph = pth.locateTrack(
+    'CPU/Funcgraph/swapper4 -funcgraph',
+    funcgraphGrp,
+  );
+  await funcgraph.scrollIntoViewIfNeeded();
+  await pth.waitForIdleAndScreenshot('cpu_funcgraph.png');
+});
+
+test('thread funcgraph', async () => {
+  const grp = pth.locateTrack('iperf 3442');
+  await grp.scrollIntoViewIfNeeded();
+  await pth.toggleTrackGroup(grp);
+  const funcgraph = pth.locateTrack('iperf 3442/Funcgraph (3450)', grp);
+  await funcgraph.scrollIntoViewIfNeeded();
+  await pth.waitForIdleAndScreenshot('thread_funcgraph.png');
+});