react-use/tests/useMount.test.ts
Anton Zinovyev 8de2a3ee13 chore: move tests to top level /tests folder
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
2019-11-08 16:55:34 -05:00

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TypeScript

import { renderHook } from '@testing-library/react-hooks';
import { useMount } from '../src';
const mockCallback = jest.fn();
afterEach(() => {
jest.resetAllMocks();
});
it('should call provided callback on mount', () => {
renderHook(() => useMount(mockCallback));
expect(mockCallback).toHaveBeenCalledTimes(1);
});
it('should not call provided callback on unmount', () => {
const { unmount } = renderHook(() => useMount(mockCallback));
expect(mockCallback).toHaveBeenCalledTimes(1);
unmount();
expect(mockCallback).toHaveBeenCalledTimes(1);
});
it('should not call provided callback on rerender', () => {
const { rerender } = renderHook(() => useMount(mockCallback));
expect(mockCallback).toHaveBeenCalledTimes(1);
rerender();
expect(mockCallback).toHaveBeenCalledTimes(1);
});