Function Component

packages/react/src/__tests__/ReactStartTransition-test.js:40–49

({level})

    let triggerHookTransition;

    const Component = ({level}) => {
      useUserSpaceSubscription();
      if (level === 0) {
        triggerHookTransition = useTransition()[1];
      }
      if (level < SUSPICIOUS_NUMBER_OF_FIBERS_UPDATED) {
        return <Component level={level + 1} />;
      }
      return null;
    };

    await act(() => {
      ReactTestRenderer.create(<Component level={0} />, {