无法模拟Javacript/tyspript中的用户定义的Axios类

Question

我正在附上下面的所有功能摘要。我正在使用Jest对此功能进行单元测试，但这需要模拟Axios。我尝试这样的尝试：

// TODO - mock axios class instance for skipped Test suites
describe("dateFilters()", () => {
    beforeEach(() => {
        jest.resetAllMocks();
    });
    it("Mock Fetch API for Date Options Response", async () => {
        const mockFn = jest.fn();
        setUpMockResponse(mockFn, mockFetchDateOptionsResponse);
        const response = await dateFilters(Workload.WIN32);
        expect(mockFn).toHaveBeenCalledTimes(1);

        expect(response?.data).toEqual(mockFetchDateOptionsResponse);
    });
});

我遇到的错误是： 投掷：“测试超过5000毫秒的超时。 如果这是一个长期运行的测试，请使用jest.settimeout（newTimeout）增加超时值。” 看来没有任何嘲笑。

所有要求函数的确定量如下：

export const dateFilters = async (platform) => {
    const dates = await getKustoResponse({
        queryName: platform.toLowerCase().concat("DateFilters"),
        platform,
        queryParams: {},
    });
    return dates;
};


export const getKustoResponse = async ({
    queryName,
    platform,
    queryParams,
    cluster = "Default",
}: QueryDetail) => {
    const dbName = getClusterValue({ platform, cluster, key: "db" });
    const url = getClusterValue({ platform, cluster, key: "kustoUrl" });
    const postBody = {
        db: dbName,
        csl: queryParams
            ? substituteQueryParameters(queries[queryName], queryParams)
            : queries[queryName],
    };

    const apiClient = ApiClient.getInstance();
    const response = await apiClient.post(url, postBody, {
        headers: {
            ...kustoApiRequestDefaultConfiguration.headers,
            "x-ms-kql-queryName": queryName,
        },
        timeout: kustoApiRequestDefaultConfiguration.timeout,
    });
    return response;
};

import Axios, { AxiosInstance } from "axios";
import axiosRetry from "axios-retry";
export class ApiClient {
    private static instance: AxiosInstance;

    public static getInstance = (): AxiosInstance => {
        if (!ApiClient.instance) {
            ApiClient.createInstance();
        }

        return ApiClient.instance;
    };

    private constructor() {
        ApiClient.getInstance();
    }

    protected static createInstance = () => {
        const responseType = "json";
        const client = Axios.create({
            responseType,
        });
        axiosRetry(client, apiRetryConfiguration);
        client.interceptors.request.use(requestInterceptor);
        client.interceptors.response.use(responseInterceptor, errorInterceptor);

        ApiClient.instance = client;
    };
}


export const requestInterceptor = async (
    request: AxiosRequestConfig
): Promise<AxiosRequestConfig> => {
    const token = await getKustoToken();
    request.headers = { ...request.headers, Authorization: `Bearer ${token}` };
    return request;
};

Answer 1

您的源代码中没有获取调用。是在Apiclient中吗？如果是这样，请这样做：

jest.spyOn(apiClient, 'post').mockImplementation();
expect(apiClient.post).toHaveBeenCalled();