Function assertSnapshot

packages/all/test/utils.ts:246–266

(
  snapshotsOrPage: eventWithTime[] | puppeteer.Page,
)

}

export async function assertSnapshot(
  snapshotsOrPage: eventWithTime[] | puppeteer.Page,
) {
  let snapshots: eventWithTime[];
  if (!Array.isArray(snapshotsOrPage)) {
    // make sure page has finished executing js
    await waitForRAF(snapshotsOrPage);
    await snapshotsOrPage.waitForFunction(
      'window.snapshots && window.snapshots.length > 0',
    );

    snapshots = (await snapshotsOrPage.evaluate(
      'window.snapshots',
    )) as eventWithTime[];
  } else {
    snapshots = snapshotsOrPage;
  }

  expect(snapshots).toBeDefined();
  expect(stringifySnapshots(snapshots)).toMatchSnapshot();
}

export async function waitForRAF(
  pageOrFrame: puppeteer.Page | puppeteer.Frame,