在 Saucelabs 中使用 Selenium 远程 Firefox webdriver 安装扩展问题

Question

问题
在 Saucelabs 上远程执行 Selenium 测试期间尝试安装 Firefox 浏览器扩展。在本地执行测试时，扩展已安装并在 Firefox 中处于活动状态，但在 Saucelabs 上远程执行时，扩展不会出现在已安装扩展列表中。按照此 Saucelabs support article.

中概述的步骤进行操作

设置
Selenium.Support v2.48.2 或 v2.49.0
Selenium.WebDriver v2.48.2 或 v2.49.0
Windows 10 或 7
火狐 43

C# 测试设置

private static FirefoxProfile CreateFirefoxProfile()
    {
        FirefoxProfile profile = new FirefoxProfile();
        profile.AddExtension("Tools/modify_headers-0.7.1.1-fx.xpi");
        profile.SetPreference("general.useragent.override", "UA-STRING");
        profile.SetPreference("extensions.modify_headers.currentVersion", "0.7.1.1-signed");
        profile.SetPreference("modifyheaders.headers.count", 1);
        profile.SetPreference("modifyheaders.headers.action0", "Add");
        profile.SetPreference("modifyheaders.headers.name0", "SampleHeader");
        profile.SetPreference("modifyheaders.headers.value0", "test1234");
        profile.SetPreference("modifyheaders.headers.enabled0", true);
        profile.SetPreference("modifyheaders.config.active", true);
        profile.SetPreference("modifyheaders.config.alwaysOn", true);
        profile.SetPreference("modifyheaders.config.start", true);

        return profile;
    }

private static IWebDriver GetRemoteDriver()
    {
        var capabilities = new DesiredCapabilities();

        var profile = CreateFirefoxProfile();

        capabilities.SetCapability(FirefoxDriver.ProfileCapabilityName, profile);

        capabilities.SetCapability("name", buildContext);
        capabilities.SetCapability(CapabilityType.BrowserName,"firefox");
        capabilities.SetCapability(CapabilityType.Version,"");
        capabilities.SetCapability(CapabilityType.Platform, "Windows 10");
        capabilities.SetCapability("screen-resolution", "1280x1024");
        capabilities.SetCapability("username", "SaucelabsUserName");
        capabilities.SetCapability("accessKey", "SaucelabsAccessKey");
        capabilities.SetCapability("build", "BuildNumber");

        return new RemoteWebDriver(new Uri("http://ondemand.saucelabs.com/wd/hub"), capabilities);
    }

Firefox 设置
在本地执行期间在 Firefox 中查看 about:support 并打开 user.js 文件时，它包含以下与 Web 驱动程序配置匹配的扩展设置。在 Saucelabs 远程实例上检查 user.js 不包括该内容。这是远程 user.js 文件内容的 paste bin。

user_pref("general.useragent.override", "UA-STRING");
user_pref("extensions.modify_headers.currentVersion", "0.7.1.1-signed");
user_pref("modifyheaders.headers.count", 1);
user_pref("modifyheaders.headers.action0", "Add");
user_pref("modifyheaders.headers.name0", "SampleHeader");
user_pref("modifyheaders.headers.value0", "test1234");
user_pref("modifyheaders.headers.enabled0", true);
user_pref("modifyheaders.config.active", true);
user_pref("modifyheaders.config.alwaysOn", true);
user_pref("modifyheaders.config.start", true);

我也试过引用 xpi 的外部版本，结果相同。 https://addons.mozilla.org/firefox/downloads/latest/967/addon-967-latest.xpi

Answer 1

向 SeleniumHQ 发布 bug report 并收到此回复，修复了上述代码。

In the RemoteWebDriver case for .NET, you need to use the ToBase64String() method. This should resolve the issue. Note that this is one of the reasons that other drivers have type-safe options classes instead of passing raw capabilities. Future versions of the .NET bindings should extend this pattern to Firefox as well, removing this as an issue in the future.

上面的 GetRemoteDriver 方法应该更新为此。

private static IWebDriver GetRemoteDriver()
{
    var capabilities = new DesiredCapabilities();

    var profile = CreateFirefoxProfile();

    // Note the change here, calling .ToBase64String()
    capabilities.SetCapability(FirefoxDriver.ProfileCapabilityName, profile.ToBase64String());

    capabilities.SetCapability("name", buildContext);
    capabilities.SetCapability(CapabilityType.BrowserName,"firefox");
    capabilities.SetCapability(CapabilityType.Version,"");
    capabilities.SetCapability(CapabilityType.Platform, "Windows 10");
    capabilities.SetCapability("screen-resolution", "1280x1024");
    capabilities.SetCapability("username", "SaucelabsUserName");
    capabilities.SetCapability("accessKey", "SaucelabsAccessKey");
    capabilities.SetCapability("build", "BuildNumber");

    return new RemoteWebDriver(new Uri("http://ondemand.saucelabs.com/wd/hub"), capabilities);
}

看到修复内容后，我找到了提到此更改的其他资源。

https://code.google.com/p/selenium/issues/detail?id=2696#c4

在 Saucelabs 中使用 Selenium 远程 Firefox webdriver 安装扩展问题

Issue installing extension with Selenium remote Firefox webdriver in Saucelabs

c#

java

firefox

selenium

saucelabs