test(useSubscritpion): add unit test for abort controller

resolves #72

Author: Katarina Anton

src/__tests__/use-subscription.spec.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
 import { renderHook, RenderHookResult } from '@testing-library/react-hooks';
-import { interval } from 'rxjs';
-import { map, finalize } from 'rxjs/operators';
+import { interval, fromEvent } from 'rxjs';
+import { map, finalize, takeUntil } from 'rxjs/operators';
 import { QueryClient, QueryClientProvider, QueryCache } from 'react-query';
 
 import {
@@ -531,6 +531,28 @@ describe('useSubscription', () => {
  });
  });
 
+ describe('queryFn', () => {
+ describe('signal', () => {
+ it('should cancel the subscription', async () => {
+ const finalizeFn = jest.fn();
+ const testSubscriptionFn = jest.fn(({ signal }) =>
+ interval(testInterval).pipe(
+ takeUntil(fromEvent(signal, 'abort')),
+ finalize(finalizeFn)
+ )
+ );
+ const { unmount } = renderHook(
+ () => useSubscription(testSubscriptionKey, testSubscriptionFn),
+ { wrapper: Wrapper }
+ );
+ expect(finalizeFn).not.toHaveBeenCalled();
+
+ unmount();
+ expect(finalizeFn).toHaveBeenCalled();
+ });
+ });
+ });
+
  describe('options', () => {
  describe('enabled', () => {
  it('should be idle while enabled = false', async () => {