MyButton.test.jsx

MyButton.test.jsx

// mock async function first
const someAsyncFunc = jest.fn().mockResolvedValue({ success: true });
jest.spyOn(hooks, 'someHook').mockImplementation(() => ({ someAsyncFunc }));

...

await act(async() => {
  wrapper
    .findWhere((node) => node.text() === 'Elenberg Fraser')
    .find('button')
    .simulate('click');
});

// This one is not necessary unless we are asserting the change in UI
// wrapper.update();

expect(someAsyncFunc).toHaveBeenCalledTimes(1);
// Add window.open = jest.fn(); in setup.js file for jest global config
expect(window.open).toHaveBeenCalledTimes(1);