org.openqa.selenium.SessionNotCreatedException：通过 Selenium v​​3.11.0 启动 Firefox v37 时无法找到匹配的功能集

我正在尝试在 Firefox 中运行测试和运行网站，但收到错误“驱动程序可执行文件的路径必须由 webdriver.gecko.driver 系统属性设置；”我已经正确设置了路径，但仍然不知道问题出在哪里。这是我的代码：

if (browsers.equalsIgnoreCase("Firefox")) 
{
        String driverPath = System.getProperty("user.dir") + "\\src/test/java\\drivers\\geckodriver.exe";
        System.setProperty("webdriver.firefox.marionette", "false");
        driver = new FirefoxDriver();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    } else if (browsers.equalsIgnoreCase("Chrome")) {
        // String driverPath = System.getProperty("user.dir") +
        // "\\src\\Drivers\\chromedriver";
        // System.setProperty("webdriver.chrome.driver", driverPath);
        System.setProperty("webdriver.chrome.driver", "D:\\chromedriver.exe");
        driver = new ChromeDriver();
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);

    }

这是我的代码的失败跟踪：

FAILED CONFIGURATION: @BeforeClass launchBrowser
org.openqa.selenium.SessionNotCreatedException: Unable to find a matching set of capabilities
Build info: version: '3.8.0', revision: '924c4067df', time: '2017-11-30T11:36:59.109Z'
System info: host: 'DSCHD-PC-180', ip: '192.168.6.122', os.name: 'Windows 7', os.arch: 'amd64', os.version: '6.1', java.version: '1.8.0_161'
Driver info: driver.version: FirefoxDriver
remote stacktrace: 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at org.openqa.selenium.remote.W3CHandshakeResponse.lambda$new$0(W3CHandshakeResponse.java:57)
    at org.openqa.selenium.remote.W3CHandshakeResponse.lambda$getResponseFunction$2(W3CHandshakeResponse.java:104)
    at org.openqa.selenium.remote.ProtocolHandshake.lambda$createSession$0(ProtocolHandshake.java:123)
    org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:126)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:73)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
    at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:219)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:142)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:120)
    at Utility.UtilityMethods.openBrowser(UtilityMethods.java:26)
    at TestCases.LoginTestCase.launchBrowser(LoginTestCase.java:35)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
    at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:59)
    at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:455)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:222)
    at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:142)
    at org.testng.internal.TestMethodWorker.invokeBeforeClassMethods(TestMethodWorker.java:168)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:105)
    at org.testng.TestRunner.privateRun(TestRunner.java:648)
    at org.testng.TestRunner.run(TestRunner.java:505)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
    at org.testng.SuiteRunner.run(SuiteRunner.java:364)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
    at org.testng.TestNG.runSuites(TestNG.java:1049)
    at org.testng.TestNG.run(TestNG.java:1017)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

SKIPPED CONFIGURATION: @AfterClass quitBrowser
SKIPPED: registration   

为了让事情简单，就像你正在使用的那样硒客户端 v3.11.0 and 火狐浏览器 v37你需要下载最新的Gecko驱动程序 from Mozilla/geckodriver https://github.com/mozilla/geckodriver/releases并将其保存在系统中的任何位置。接下来在System.setProperty()线路经过Key webdriver.gecko.driver随着Value as the 绝对路径 of the Gecko驱动程序并最终通过所需能力类设置能力木偶 to false并合并到一个实例中Firefox选项实例来初始化Firefox浏览器如下：

System.setProperty("webdriver.gecko.driver", "C:/path/to/geckodriver.exe");
DesiredCapabilities dc = new DesiredCapabilities();
dc.setCapability("marionatte", false);
FirefoxOptions opt = new FirefoxOptions();
opt.merge(dc);
FirefoxDriver driver =  new FirefoxDriver(opt);
driver.get("https://stackoverflow.com");
System.out.println("Application opened");
System.out.println("Page Title is : "+driver.getTitle());
driver.quit();

Update

根据您的评论更新您正在使用Gecko驱动程序 v0.20.1.

但如果你回顾一下发行说明Gecko驱动程序 v0.18.0它明确提到：

geckodriver now recommends Firefox 53 and greater

所以使用Gecko驱动程序 v0.18.0及以上版本您必须强制使用 Firefox 53 及更高版本。要摆脱此限制，您可以降级到以下任一版本：

• Gecko驱动程序 v0.17.0
• Gecko驱动程序 v0.16.1