在房產上進行間諜活動

const foop = {
    get value() {},
    set value(v) {}
};

it('can spy on getter', () => {
    spyOnProperty(foop, 'value', 'get').and.returnValue(1);
    expect(foop.value).toBe(1);
});

it('and on setters', () => {
    const spiez = spyOnProperty(foop, 'value', 'set');
    foop.value = true;
    expect(spiez).toHaveBeenCalled();
});