我的硒测试不起作用，问题出在哪里？

Question

我想使用硒网格，这是我的步骤：

1. 启动Selenium网格hub:java-jar selenium-server-standalone-3.141.59.jar-ro hub
2. 启动Selenium节点:java-jar selenium-server-standalone-3.141.59.jar-ro node-hub http://localhost:4444/grid/register-browser browsername=chrome
3. Java代码:

    public class TestGrid {
        static WebDriver driver;
        static String nodeUrl;

        @Before
        public void setup() throws MalformedURLException {
            nodeUrl = "http://localhost:4444/wd/hub";
            DesiredCapabilities capabilities = DesiredCapabilities.chrome();
            capabilities.setBrowserName("chrome");
            capabilities.setPlatform(Platform.MAC);
            driver = new RemoteWebDriver(new URL(nodeUrl), capabilities);
        }

        @Test
        public void simpleTest() {
            driver.get("https://www.edureka.co");
            Assert.assertEquals("Instructor Led Online Courses with 24x7 On-Demand Support | Edureka",
                    driver.getTitle());
        }

        @After
        public void afterTest() {
            driver.quit();
        }
    }

但是当我在IDE中运行这个时，我发现测试部分从未到达，似乎处于前一步，只是停留在最后一步：

driver = new RemoteWebDriver(new URL(nodeUrl), capabilities);

我只从控制台看到：

Oct 05, 2019 10:08:15 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Attempting bi-dialect session, assuming Postel's Law holds true on the remote end

在selenim集线器控制台中：

10:09:16.438 INFO [RequestHandler.process] - Got a request to create a new session: Capabilities {browserName: chrome, platform: MAC, version: }
10:09:16.443 INFO [TestSlot.getNewSession] - Trying to create a new session on test slot {server:CONFIG_UUID=952f43b8-f264-48b3-aa6f-eff6ff59b16e, seleniumProtocol=WebDriver, browserName=chrome, platformName=MAC, platform=MAC}

然后永远不要到达测试部分

ChromeDriver 77.0.3865.40 (f484704e052e0b556f8030b65b953dce96503217-refs/branch-heads/3865@{#442})

我遵循了下面的说明，但是当启动java junit时，我从selenium server hub控制台得到了错误：

Got a request to create a new session: Capabilities {browserName: chrome, platform: MAC}
10:30:12.334 INFO [TestSlot.getNewSession] - Trying to create a new session on test slot {server:CONFIG_UUID=4b8d38ff-8be6-4894-8c17-8fe334c7c3bc, seleniumProtocol=WebDriver, browserName=chrome, maxInstances=5, platformName=MAC, platform=MAC}
10:30:28.926 INFO [RequestHandler.process] - Error forwarding the new session Error forwarding the request Failed to connect to /10.1.3.246:14786
org.openqa.grid.internal.exception.NewSessionException: Error forwarding the request Failed to connect to /10.1.3.246:14786
    at org.openqa.grid.web.servlet.handler.RequestHandler.forwardNewSessionRequestAndUpdateRegistry(RequestHandler.java:94)
    at org.openqa.grid.web.servlet.handler.RequestHandler.process(RequestHandler.java:114)
    at org.openqa.grid.web.servlet.Driver

在将chromedriver复制到与selenium jar文件夹相同的文件夹后，我看到了这个错误。

在Java控制台中，我看到了以下内容：

Oct 08, 2019 10:30:12 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Attempting bi-dialect session, assuming Postel's Law holds true on the remote end
Oct 08, 2019 10:31:28 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Falling back to original OSS JSON Wire Protocol.
Oct 08, 2019 10:32:44 AM org.openqa.selenium.remote.ProtocolHandshake createSession
INFO: Falling back to straight W3C remote end connection

org.openqa.selenium.SessionNotCreatedException: Unable to create new remote session. desired capabilities = Capabilities [{browserName=chrome, platform=MAC}], required capabilities = Capabilities [{}]
Build info: version: '3.0.1', revision: '1969d75', time: '2016-10-18 09:49:13 -0700'
System info: host: 'my.local', ip: '10.1.2.137', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.14.6', java.version: '1.8.0_171'
Driver info: driver.version: RemoteWebDriver

    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:91)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:141)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:241)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:128)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:155)
    at com.datavisor.e2e.TestGrid.setup(TestGrid.java:41)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

也许是版本问题？

Answer 1

您在使用JUnit吗？如果是，请检查Junit error trace中的以下错误。

org.openqa.selenium.SessionNotCreatedException：无法创建新服务：ChromeDriverService构建信息：版本:'3.141.59'，修订:'E82BE7D358'，时间:'2018-11-14T08:25:53'

如果这是您得到的错误，

java -jar -Dwebdriver.chrome.driver=chromedriver selenium-server-standalone-3.141.59.jar -role node -hub http://localhost:4444/grid/register -browser browserName=chrome