Function nextRender

packages/testing/src/index.ts:68–85

()

  let rendersConsumed = output.writeCount;

  function nextRender(): Promise<void> {
    const waitForRender =
      output.writeCount > rendersConsumed
        ? Promise.resolve()
        : new Promise<void>((resolve) => output.once('render', resolve));

    // After detecting a render, let the event loop settle so that multiple
    // synchronous-ish renders (e.g. validation: loading → error) are coalesced.
    return waitForRender.then(
      () =>
        new Promise<void>((resolve) => {
          setImmediate(() => {
            rendersConsumed = output.writeCount;
            resolve();
          });
        }),
    );
  }

  return {
    answer,