how to spy on console.error jest
beforeAll(() => {
// Create a spy on console (console.log in this case) and provide some mocked implementation
// In mocking global objects it's usually better than simple `jest.fn()`
// because you can `unmock` it in clean way doing `mockRestore`
jest.spyOn(console, 'log').mockImplementation(() => {});
});
afterAll(() => {
// Restore mock after all tests are done, so it won't affect other test suites
console.log.mockRestore();
});
afterEach(() => {
// Clear mock (all calls etc) after each test.
// It's needed when you're using console somewhere in the tests so you have clean mock each time
console.log.mockClear();
});