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8de2a3ee13
chore: move all the tests to the separate directory outside of sources; chore: remove jest.config.js (config moved to the package.json); test: unused import in test; test: 💍 fix tests add back x and y to useMeasure chore: 🤖 add linter to /tests folder ci: 🎡 limit Jest worker count for CircleCI
22 lines
721 B
TypeScript
22 lines
721 B
TypeScript
import { renderHook } from '@testing-library/react-hooks';
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import { useEffectOnce } from '../src';
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const mockEffectCleanup = jest.fn();
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const mockEffectCallback = jest.fn().mockReturnValue(mockEffectCleanup);
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it('should run provided effect only once', () => {
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const { rerender } = renderHook(() => useEffectOnce(mockEffectCallback));
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expect(mockEffectCallback).toHaveBeenCalledTimes(1);
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rerender();
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expect(mockEffectCallback).toHaveBeenCalledTimes(1);
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});
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it('should run clean-up provided on unmount', () => {
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const { unmount } = renderHook(() => useEffectOnce(mockEffectCallback));
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expect(mockEffectCleanup).not.toHaveBeenCalled();
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unmount();
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expect(mockEffectCleanup).toHaveBeenCalledTimes(1);
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});
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