Function update

packages/react-reconciler/src/__tests__/ReactHooks-test.internal.js:477–482

    expect(root).toMatchRenderedOutput('0');

    const update = value => {
      setCounter(previous => {
        Scheduler.log(`Compute state (${previous} -> ${value})`);
        return value;
      });
    };
    ReactTestRenderer.unstable_batchedUpdates(() => {
      update(0);
      update(0);