1import { memoize } from '../fn';
2
3describe(memoize, () => {
4  it(`memoizes`, () => {
5    const fn = jest.fn(() => 'd');
6    const memoized = memoize(fn);
7    expect(memoized()).toEqual('d');
8    expect(memoized()).toEqual('d');
9    expect(memoized()).toEqual('d');
10    expect(fn).toHaveBeenCalledTimes(1);
11  });
12});
13