test(*): add unit tests for not resubscribing when re-rendered

Author: kaciakmaciak

src/__tests__/use-infinite-subscription.spec.tsx

@@ -55,6 +55,19 @@ describe('useInfiniteSubscription', () => {
  return { pageParams: [undefined], pages: [data] };
  }
 
+ it('should not re-subscribe when re-rendered', () => {
+ const { subscriptionFn } = subscriptionFnFactory();
+ const { rerender } = renderHook(
+ () => useInfiniteSubscription(['non-primitive-key'], subscriptionFn),
+ { wrapper: Wrapper }
+ );
+ expect(subscriptionFn).toHaveBeenCalledTimes(1);
+ subscriptionFn.mockClear();
+
+ rerender();
+ expect(subscriptionFn).toHaveBeenCalledTimes(0);
+ });
+
  describe('options', () => {
  describe('getNextPageParam', () => {
  test('fetching next page', async () => {

src/__tests__/use-subscription.spec.tsx

@@ -196,6 +196,18 @@ describe('useSubscription', () => {
  expect(finalizeFn).toHaveBeenCalledTimes(1);
  });
 
+ it('should not re-subscribe when re-rendered', () => {
+ const { rerender } = renderHook(
+ () => useSubscription(['non-primitive-key'], testSubscriptionFn),
+ { wrapper: Wrapper }
+ );
+ expect(testSubscriptionFn).toHaveBeenCalledTimes(1);
+ testSubscriptionFn.mockClear();
+
+ rerender();
+ expect(testSubscriptionFn).toHaveBeenCalledTimes(0);
+ });
+
  test('re-subscribe when mounted/unmounted/mounted', async () => {
  const { result, waitForNextUpdate, unmount, rerender } = renderHook(
  () => useSubscription(testSubscriptionKey, testSubscriptionFn),