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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
36 lines
905 B
TypeScript
36 lines
905 B
TypeScript
import { act, renderHook } from '@testing-library/react-hooks';
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import useUpdate from '../src/useUpdate';
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it('should init update function', () => {
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const { result } = renderHook(() => useUpdate());
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const update = result.current;
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expect(update).toBeInstanceOf(Function);
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});
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it('should forces a re-render every time update function is called', () => {
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let renderCount = 0;
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const { result } = renderHook(() => {
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renderCount++;
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return useUpdate();
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});
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const update = result.current;
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expect(renderCount).toBe(1);
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act(() => update());
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expect(renderCount).toBe(2);
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act(() => update());
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expect(renderCount).toBe(3);
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});
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it('should return same update function instance on each update', () => {
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const { result, rerender } = renderHook(() => useUpdate());
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const { current: updateCb } = result;
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rerender();
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expect(Object.is(result.current, updateCb)).toBe(true);
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});
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