如何用玩笑模拟navigator.userAgentData.getHighEntropyValues

Question

我想在我的测试中模拟navigator.userAgentData.getHighEntropyValues的解析值，作为一个示例对象。

我该怎么做？

我试过：

  beforeEach(() => {
    jest.mock(global.navigator.userAgentData);
  });
  it('uaFullVersion is defined', async () => {
     global.navigator.userAgentData.getHighEntropyValues.mockResolvedValueOnce({uaFullVersion: '1.2.3'});
     const hev = await myFunc();
     expect(hev.uaFullVersion).toBeDefined();
  });

myFunc：

async function myFunc() {
  const hev = await navigator.userAgentData.getHighEntropyValues(["uaFullVersion"]);
  return hev;
}

但是我得到了错误TypeError: Cannot read properties of undefined (reading 'getHighEntropyValues')

Answer 1

您在beforeEach上尝试使用jest.mock而不是jest.mock吗？

像这样：

jest.spyOn(global.navigator.userAgentData,  
    'getHighEntropyValues').mockResolvedValueOnce({})