Add test for new count and boundingBox snapshots

tests/playwright-test/playwright.trace.spec.ts

@@ -1271,3 +1271,49 @@ test('should record trace after fixture teardown timeout', {
   // Check console events to make sure that library trace is recorded.
   expect(trace.events).toContainEqual(expect.objectContaining({ type: 'console', text: 'from the page' }));
 });
+
+test('should record trace snapshot for more obscure commands', async ({ runInlineTest }) => {
+  const result = await runInlineTest({
+    'a.spec.ts': `
+      import { test, expect } from '@playwright/test';
+      test('test 1', async ({ browser }) => {
+        const page = await browser.newPage();
+        await page.setContent('<div>Content</div>');
+        expect(await page.locator('div').count()).toBe(1);
+        await page.locator('div').boundingBox();
+      });
+    `,
+  }, { trace: 'on' });
+
+  expect(result.exitCode).toBe(0);
+  expect(result.passed).toBe(1);
+
+  const tracePath = test.info().outputPath('test-results', 'a-test-1', 'trace.zip');
+  const trace = await parseTrace(tracePath);
+  expect(trace.actionTree).toEqual([
+    'Before Hooks',
+    '  fixture: browser',
+    '    browserType.launch',
+    'browser.newPage',
+    'page.setContent',
+    'locator.count',
+    'expect.toBe',
+    'locator.boundingBox',
+    'After Hooks',
+  ]);
+
+  const snapshots = trace.traceModel.storage();
+  const snapshotFrameOrPageId = snapshots.snapshotsForTest()[0];
+
+  const countAction = trace.actions.find(a => a.apiName === 'locator.count');
+  expect(countAction.beforeSnapshot).toBeTruthy();
+  expect(countAction.afterSnapshot).toBeTruthy();
+  expect(snapshots.snapshotByName(snapshotFrameOrPageId, countAction.beforeSnapshot)).toBeTruthy();
+  expect(snapshots.snapshotByName(snapshotFrameOrPageId, countAction.afterSnapshot)).toBeTruthy();
+
+  const boundingBoxAction = trace.actions.find(a => a.apiName === 'locator.boundingBox');
+  expect(boundingBoxAction.beforeSnapshot).toBeTruthy();
+  expect(boundingBoxAction.afterSnapshot).toBeTruthy();
+  expect(snapshots.snapshotByName(snapshotFrameOrPageId, boundingBoxAction.beforeSnapshot)).toBeTruthy();
+  expect(snapshots.snapshotByName(snapshotFrameOrPageId, boundingBoxAction.afterSnapshot)).toBeTruthy();
+});