添加此行代码const mockedAxios = axios as jest.Mocked<typeof axios>。然后使用mockedAxios调用mockReturnValueOnce。使用您的代码，应该像这样完成：
import myModuleThatCallsAxios from '../myModule';
import axios from 'axios';
jest.mock('axios');
const mockedAxios = axios as jest.Mocked<typeof axios>;
it('Calls the GET method as expected', async () => {
const expectedResult: string = 'result';
mockedAxios.get.mockReturnValueOnce({ data: expectedResult });
const result = await myModuleThatCallsAxios.makeGetRequest();
expect(mockedAxios.get).toHaveBeenCalled();
expect(result).toBe(expectedResult);
});
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