javascript - Selenium - 使用 NodeJS 中的 selenium-webdriver 库与现有浏览器 session 交互

Question

http://tarunlalwani.com/post/reusing-existing-browser-session-selenium/

这篇文章提供了将现有 session 用于 selenium 的见解，但这是在 Python/Java 中。想使用 selenium-webdriver 库在 NodeJS 中实现相同的逻辑。

我可以使用以下方式访问 session ID:

    driver.getSession().then( function(session) {
         console.log('Session:'+session.getId());
    });

但是如何获取executor值呢？

检查并发现 webdriver.WebDriver.attachToSession 方法将附加到现有 session ，但需要 executor 和 session 的值相同。

Answer 1

可以使用 Node 附加到现有的 webdriver session

您只需要手动创建 WebDriver 对象，无需构建器。

const _http = require('selenium-webdriver/http');

//todo: replace with your session ID and selenium url
let sessionId = 'cddab287623789c665c1dbc5c64bf702';
let url = 'http://localhost:4444/wd/hub';

let driver = new WebDriver(
    sessionId,
    new _http.Executor(Promise.resolve(url)
        .then(
            url => new _http.HttpClient(url, null, null))
    )
);

更复杂的示例:测试将尝试使用现有 session ，如果它不起作用 - 将创建一个新 session 。

const {Builder, By, Key, until, WebDriver} = require('selenium-webdriver');
const _http = require('selenium-webdriver/http');

(async function example() {
    //todo: replace this value with session ID after test is executed first time
    let sessionId = 'cddab287623789c665c1dbc5c64bf702';
    let url = 'http://localhost:4444/wd/hub';
    let browser = 'chrome';
    let startUrl = 'http://www.google.com/ncr';

    //Connect to existing session
    let driver = await new WebDriver(
        sessionId,
        new _http.Executor(Promise.resolve(url)
            .then(
                url => new _http.HttpClient(url, null, null))
        )
    );

    //Trying to open URL. If does not work - we need to re-create a session
    await driver.get(startUrl).catch(async r => {
        console.log('Session "' + sessionId + '" not found. Creating new session.');
        driver = await new Builder()
            .usingServer(url)
            .forBrowser(browser)
            .build();
        driver.getSession().then(function(e){
            console.log('Session: ' + JSON.stringify(e, null, 2));
        });
        driver.get(startUrl);
    });

    console.log('Starting test execution');

    try {
        await driver.findElement(By.name('q')).sendKeys('webdriver', Key.RETURN);
        await driver.wait(until.titleIs('webdriver - Google Search'), 1000);
    } finally {
        //todo: We intentionally do not close the session in order to use it next time
        // await driver.quit();
    }
})();