selenium - 使用脚本设置 Selenium 网格

Question

设置 Selenium 网格:

我能够在命令提示符中使用以下命令设置网格(集线器和节点)，然后能够启动浏览器并成功执行测试。

    java -jar selenium-server-standalone-3.4.0.jar -role hub
    java -jar selenium-server-standalone-3.4.0.jar -role webdriver -hub "http://localhost:4444/grid/register" -port 5566

当尝试通过脚本设置 Selenium 网格时，我能够成功设置集线器和节点，但无法启动浏览器。

请帮助解决问题。

请找到下面的代码和控制台:

    package config.HubNode;

    import java.net.MalformedURLException;  
    import java.net.URL;    
    import org.openqa.grid.common.RegistrationRequest;  
    import org.openqa.grid.internal.utils.SelfRegisteringRemote;  
    import org.openqa.grid.internal.utils.configuration.GridHubConfiguration;  
    import org.openqa.grid.internal.utils.configuration.GridNodeConfiguration;  
    import org.openqa.grid.web.Hub;  
    import org.openqa.selenium.Platform; 
    import org.openqa.selenium.WebDriver;  
    import org.openqa.selenium.remote.DesiredCapabilities;
    import org.openqa.selenium.remote.RemoteWebDriver;

    public class HubNodeConfig {

    public static void main(String[] args) throws Exception {

        HubNodeConfig objHubNodeConfig = new HubNodeConfig();
        objHubNodeConfig.HubConfig();
        System.out.println("Hub Configured Successfully");

        objHubNodeConfig.NodeConfig();
        System.out.println("Node Configured to Hub Successfully");
        objHubNodeConfig.InvokeBrowser();
    }

    public void HubConfig() throws Exception
    {
        GridHubConfiguration gridHubConfig = new GridHubConfiguration();
        gridHubConfig.role = "hub";
        gridHubConfig.host = "localhost";
        gridHubConfig.port = 4444;

        Hub myHub = new Hub(gridHubConfig);
        myHub.start();
    }

    public void NodeConfig()
    {
        GridNodeConfiguration gridNodeConfig = new GridNodeConfiguration();
        gridNodeConfig.hub = "http://localhost:4444/grid/register"
        gridNodeConfig.host = "192.xxx.xx.xx" //my ip address
        gridNodeConfig.port = 5566;
        gridNodeConfig.role = "webdriver";

        RegistrationRequest req = new RegistrationRequest(gridNodeConfig);
        req.getConfiguration();
        req.validate();
        RegistrationRequest.build(gridNodeConfig);

        SelfRegisteringRemote remote = new SelfRegisteringRemote(req);
        remote.startRegistrationProcess();
    }

    public void InvokeBrowser() throws MalformedURLException
    {
        System.setProperty("webdriver.chrome.driver", "E:\\chromedriver.exe");
        DesiredCapabilities capability = DesiredCapabilities.chrome();
        capability.setBrowserName("chrome");
        capability.setPlatform(Platform.WIN10);

        WebDriver driver = new RemoteWebDriver(new URL("http://"+gridNodeConfig.host+":"+gridNodeConfig.port+"/wd/hub"), capability);
        System.out.println("Driver Launched Successfully");
        driver.get("https://google.com");
    }
    }

控制台错误消息和网格屏幕截图:

    2017-07-20 23:57:17.135:INFO::main: Logging initialized @2576ms to org.seleniumhq.jetty9.util.log.StdErrLog    
    Jul 20, 2017 11:57:17 PM org.openqa.grid.web.Hub initServer
    INFO: Will listen on 4444    
    2017-07-20 23:57:17.509:INFO:osjs.Server:main: jetty-9.4.3.v20170317     
    2017-07-20 23:57:17.569:INFO:osjs.session:main: DefaultSessionIdManager workerName=node0    
    2017-07-20 23:57:17.570:INFO:osjs.session:main: No SessionScavenger set, using defaults    
    2017-07-20 23:57:17.573:INFO:osjs.session:main: Scavenging every 600000ms    
    2017-07-20 23:57:17.592:INFO:osjsh.ContextHandler:main: Started o.s.j.s.ServletContextHandler@1a1d6a08{/,null,AVAILABLE}    
    2017-07-20 23:57:17.804:INFO:osjs.AbstractConnector:main: Started ServerConnector@77f99a05{HTTP/1.1,[http/1.1]}{0.0.0.0:4444}    
    2017-07-20 23:57:17.804:INFO:osjs.Server:main: Started @3245ms    
    Hub Configured Successfully    
    Jul 20, 2017 11:57:19 PM org.openqa.grid.internal.utils.SelfRegisteringRemote$1 run    
    INFO: Starting auto registration thread. Will try to register every 5000 ms.    
    Jul 20, 2017 11:57:19 PM org.openqa.grid.internal.utils.SelfRegisteringRemote registerToHub    
    INFO: Registering the node to the hub: http: //localhost:4444/grid/register    
    Node Configured to Hub Successfully    
    Jul 20, 2017 11:57:19 PM org.openqa.grid.internal.Registry add    
    INFO: Registered a node http: //192.xxx.xx.xx:5566    
    Jul 20, 2017 11:57:19 PM org.openqa.grid.internal.utils.SelfRegisteringRemote registerToHub   
    INFO: The node is registered to the hub and ready to use    

    Exception in thread "main" 
    <b>org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.</b>    
    Build info: version: '3.4.0', revision: 'unknown', time: 'unknown'
    System info: host: 'KRISH', ip: '192.xxx.xx.xx', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_131'    
    Driver info: driver.version: RemoteWebDriver
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:658)
        at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:250)
        at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:236)
        at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:137)
        at org.openqa.selenium.remote.RemoteWebDriver.(RemoteWebDriver.java:174)
        at config.HubNode.HubNodeConfig.InvokeBrowser(HubNodeConfig.java:71)
        at config.HubNode.HubNodeConfig.main(HubNodeConfig.java:29)
    <b> Caused by: org.apache.http.conn.HttpHostConnectException: Connect to 192.xxx.xx.xx:5566 [/192.xxx.xx.xx] failed: Connection refused: connect </b>
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:159)
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)
        at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)
        at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)
        at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
        at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
        at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
        at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
        at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
        at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:139)
        at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:87)
        at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:343)
        at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:159)
        at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:637)
        ... 6 more
    Caused by: java.net.ConnectException: Connection refused: connect
        at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
        at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
        at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
        at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
        at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
        at java.net.PlainSocketImpl.connect(Unknown Source)
        at java.net.SocksSocketImpl.connect(Unknown Source)
        at java.net.Socket.connect(Unknown Source)
        at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
        ... 21 more

    >Jul 21, 2017 12:15:30 AM org.openqa.grid.selenium.proxy.DefaultRemoteProxy onEvent     
    INFO: Marking the node http: //192.xx.xx.xx:5566 as down: cannot reach the node for 2 tries    
    Jul 21, 2017 12:16:30 AM org.openqa.grid.selenium.proxy.DefaultRemoteProxy onEvent    
    INFO: Unregistering the node http: //192.xx.xx.xx:5566 because it's been down for 60077 milliseconds    
    Jul 21, 2017 12:16:30 AM org.openqa.grid.internal.Registry removeIfPresent    
    WARNING: Cleaning up stale test sessions on the unregistered node http: //192.xx.xx.xx:5566    
    Jul 21, 2017 12:16:34 AM org.openqa.grid.internal.utils.SelfRegisteringRemote registerToHub    
    INFO: Registering the node to the hub: http: //localhost:4444/grid/register    
    Jul 21, 2017 12:16:34 AM org.openqa.grid.internal.Registry add    
    INFO: Registered a node http: //192.xx.xx.xx:5566    
    Jul 21, 2017 12:16:34 AM org.openqa.grid.internal.utils.SelfRegisteringRemote registerToHub    
    INFO: The node is registered to the hub and ready to use    
    Jul 21, 2017 12:16:46 AM org.openqa.grid.selenium.proxy.DefaultRemoteProxy onEvent    
    INFO: Marking the node http: //192.xx.xx.xx:5566 as down: cannot reach the node for 2 tries    

Screenshot of Grid Console

Answer 1

您启动节点的代码有问题。请按如下方式修复。

方法 nodeConfig() 不会将服务器注入(inject)到 SelfRegisteringRemote 中。

它应该是这样的:

RegistrationRequest req = RegistrationRequest.build(gridNodeConfig);
SelfRegisteringRemote remote = new SelfRegisteringRemote(req);
remote.setRemoteServer(new SeleniumServer(gridNodeConfig));
remote.startRemoteServer();
remote.startRegistrationProcess();

另外，请将您的 RemoteWebDriver 实例化代码更改为如下

WebDriver driver = new RemoteWebDriver(new URL("http://" + gridHubConfig.host + ":" + gridHubConfig.port + "/wd/hub"), capability);

注意，我们正在连接到 gridHubConfig 主机及其端口，而不是节点的端口(这正是您的代码所做的)。

一旦解决了这些问题，您的代码应该可以正常工作，并且您应该看到通过您的代码衍生出嵌入式网格。