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JavaScript2/Week3/test/step2-1.test.js at master · foocoding/JavaScript2 · GitHub

10 lines (8 loc) · 221 Bytes

const foo = require('../homework/step2-1');
const mockFn = jest.fn(() => undefined);
describe('step2-1', () => {
  test('foo calls func', () => {
    foo(mockFn);
    expect(mockFn.mock.calls.length).toBe(1);

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