Question

此代码应该将img src的值转换为本地路径。

const middlewares = require('../../../../src/routes/api/auth/shared/middlewares');
const removeEmptyProperty = require('../../../../src/utils/utils').removeEmptyProperty;

let app;
let service;
let request;

/*
 * The reason we need this is:
 * If the mock not works,
 * the whole test is meaningless
 */
const checkIfTheStubWorks = () => {
    expect(spy1).toHaveBeenCalled();
    expect(spy2).toHaveBeenCalled();
    expect(spy3).toHaveBeenCalled();
};

const loadAllModules = () => {
    service = require('../../../../src/routes/api/auth/facebook/fblogin').service;
    app = require('../../../../src/config/expressapp').setupApp();
    request = require('supertest')(app);
};

describe('Mock response from facebook', () => {
    let spy1 = {};
    let spy2 = {};
    let spy3 = {};
    const testReq = testData.fbShortToken;

beforeAll(() => {
    spy1 = jest.spyOn(middlewares, 'saveUser').mockImplementation((req, res, next) => {
        userToSaveOrUpdate = removeEmptyProperty(res.locals.user);
        next();
    });

    // It must be load here, in this order,
    // otherwise, the above mock won't work!
    loadAllModules();

    spy2 = jest.spyOn(service, 'exchangeLongTimeToken').mockImplementation((url) => {
        // mock it
    });

    spy3 = jest.spyOn(service, 'retrieveUserInfo').mockImplementation((url) => {
        // mock it
    });
});

afterAll(() => {
    spy1.mockRestore();
    spy2.mockRestore();
    spy3.mockRestore();
});

test('Return a JWT should have same length as facebook one', async () => {
    const response = await request.post(facebookAPI).send(testReq);
    // assert this, assert that 
    checkIfTheStubWorks();
});
});

它正确匹配整个图像标签，但只有一个捕获。我认为括号分隔了捕获，但它似乎没有像那样工作。

我应该怎么写这个以获得三次捕获，中间的一次是路径？

Answer 1

尝试使用Groups Property代替Captures，如下所示：

var matches = Regex.Replace("<img src=\"dsa\"/>", "(<[ ]*img[^s]+src=[\"'])([^\"']*)([\"'][^/]*/>)", 
    (match)=> {
        return string.Format("{0}{1}{2}", 
            match.Groups[1], 
            HostingEnvironment.MapPath("~/" + match.Groups[2]),
            match.Groups[3]);
        });

捕获C＃正则表达式

1 个答案: