使用WebdriverManager注册多个测试线程中的驱动程序时出错

Question

我使用TestNG xml文件来管理测试队列和环境参数。 并且想使用WebdriverManager库来在系统中注册驱动程序。但是，如果线程数超过1，则驱动程序未正确注册。请看下面。

对于instanse这里是测试配置和驱动程序实例化的例子：

测试1：

<suite name="project"> 
    <test name = "Wiki search tests" verbose="1" parallel="true"> 
     <parameter name="browserName" value="firefox" /> 
     <classes> 
      <class name="project.tests.WikiSearchTest"/> 
     </classes> 
    </test> 
</suite> 

测试2：

<suite name="project"> 
    <test name = "Wiki authorization tests" verbose="1" parallel="true"> 
     <parameter name="browserName" value="chrome" /> 
     <classes> 
      <class name="project.tests.LoginTest"/> 
     </classes> 
    </test> 
</suite> 

你可以看到，两者都有“browserName “参数，但其中的值不同。的驱动器在测试基类注册 实施例：

private static final CountDownLatch latch = new CountDownLatch(1); 

@Parameters({"browserName"}) 
@BeforeTest 
public void setUp(@Optional String browserName) throws InterruptedException{ 
    switch (browserName) { 
     case "firefox" : 
      FirefoxDriverManager.getInstance().setup(); 
      latch.countDown(); 
      System.out.println(" in firefox"); 
      break; 
     case "chrome" : 
      ChromeDriverManager.getInstance().setup(); 
      latch.countDown(); 
      System.out.println(" in chrome"); 
      break; 
    } 
    latch.await(); 

Surefire插件线程设置：

<plugin> 
     <groupId>org.apache.maven.plugins</groupId> 
     <artifactId>maven-surefire-plugin</artifactId> 
     <version>${surefire.version}</version> 

     <configuration> 
       <properties> 
       <property> 
        <name>suitethreadpoolsize</name> 
        <value>2</value> 
       </property> 

当测试用值= 1 suitethreadpoolsize属性运行中，所有工作完全：

Running TestSuite 
[2017-04-10 11:32:45:490] [main] INFO BrowserManager - Reading https://chromedriver.storage.googleapis.com/ to seek [chromedriver] 
[2017-04-10 11:32:46:172] [main] INFO BrowserManager - Latest version of [chromedriver] is 2.29 
[2017-04-10 11:32:46:190] [main] INFO BrowserManager - Exporting webdriver.chrome.driver as C:\Users\bnesteruk\.m2\repository\webdriver\chromedriver\win32\2.29\chromedriver.exe 
in chrome 
Starting ChromeDriver 2.29.461591 (62ebf098771772160f391d75e589dc567915b233) on port 11014 


[2017-04-10 11:32:49:314] [main] INFO BrowserManager - Reading https://api.github.com/repos/mozilla/geckodriver/releases to seek [wires, geckodriver] 
[2017-04-10 11:32:49:590] [main] INFO BrowserManager - Latest version of [wires, geckodriver] is 0.15.0 
[2017-04-10 11:32:49:649] [main] INFO BrowserManager - Exporting webdriver.gecko.driver as C:\Users\bnesteruk\.m2\repository\webdriver\geckodriver\win64\0.15.0\geckodriver.exe 
in firefox 

Tests run: 0, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 7.831 sec - in TestSuite 

问题：

如果我设置的线程数超过1万无一失插件，

<property> 
     <name>suitethreadpoolsize</name> 
     <value>4</value> 
</property> 

两个.setup（）方法并行运行，并似乎在BrowserManager的webdriver的静态实例只是由过去的浏览器名称（geckodriver在更换我的例子）

[2017-04-10 11:38:00:726] [pool-1-thread-1] INFO BrowserManager - Reading https://api.github.com/repos/mozilla/geckodriver/releases to seek [wires, geckodriver] 
[2017-04-10 11:38:00:726] [pool-1-thread-2] INFO BrowserManager - Reading https://api.github.com/repos/mozilla/geckodriver/releases to seek [wires, geckodriver] 
[2017-04-10 11:38:01:301] [pool-1-thread-2] INFO BrowserManager - Latest version of [wires, geckodriver] is 0.15.0 
[2017-04-10 11:38:01:301] [pool-1-thread-1] INFO BrowserManager - Latest version of [wires, geckodriver] is 0.15.0 
[2017-04-10 11:38:01:361] [pool-1-thread-2] INFO BrowserManager - Exporting webdriver.gecko.driver as C:\Users\bnesteruk\.m2\repository\webdriver\geckodriver\win64\0.15.0\geckodriver.exe 
[2017-04-10 11:38:01:361] [pool-1-thread-1] INFO BrowserManager - Exporting webdriver.gecko.driver as C:\Users\bnesteruk\.m2\repository\webdriver\geckodriver\win64\0.15.0\geckodriver.exe 
in chrome 
in firefox 
[WARNING] [11:38:01.496] The path to the driver executable must be set by the webdriver.chrome.driver system property; for more information, see https://github.com/SeleniumHQ/selenium/wiki/ChromeDriver. The latest version can be downloaded from http://chromedriver.storage.googleapis.com/index.html 

我想，我用错误的方式使用CountDownLatch？我怎么能这样做？

Answer 1

您可以使用Java CountDownLatch等待WebDriverManager正在运行。像这样的东西（当然适用于您的代码）：

// Latch declaration (maybe as a class field) 
CountDownLatch latch = new CountDownLatch(1); 

// Somewhere in your code, you call to WebDriverManabger 
ChromeDriverManager.getInstance().setup(); 
latch.countDown(); 

// In some other place in your code, you instantiate a WebDriver object 
latch.await(); 
WebDriver chrome = new ChromeDriver(); 

Answer 2

问题已通过添加简单的同步（BrowserManager的）部分，驾驶员登记部，由于解决了！

synchronized (BrowserManager.class) { 
      switch (browserName) { 
       case "firefox": 
        FirefoxDriverManager.getInstance().setup(); 
        System.out.println("Registering FIREFOX"); 
        break; 
       case "chrome": 
        ChromeDriverManager.getInstance().setup(); 
        System.out.println("Registering CHROME"); 
        break; 
      } 
     } 

输出：

Running TestSuite 
Registering CHROME 
[2017-04-10 12:34:51:913] [pool-1-thread-2] INFO BrowserManager - Reading https://chromedriver.storage.googleapis.com/ to seek [chromedriver] 
[2017-04-10 12:34:52:604] [pool-1-thread-2] INFO BrowserManager - Latest version of [chromedriver] is 2.29 
[2017-04-10 12:34:52:624] [pool-1-thread-2] INFO BrowserManager - Exporting webdriver.chrome.driver as C:\Users\bnesteruk\.m2\repository\webdriver\chromedriver\win32\2.29\chromedriver.exe 
Registering FIREFOX 
[2017-04-10 12:34:53:206] [pool-1-thread-1] INFO BrowserManager - Reading https://api.github.com/repos/mozilla/geckodriver/releases to seek [wires, geckodriver] 
[2017-04-10 12:34:53:487] [pool-1-thread-1] INFO BrowserManager - Latest version of [wires, geckodriver] is 0.15.0 
[2017-04-10 12:34:53:505] [pool-1-thread-1] INFO BrowserManager - Exporting webdriver.gecko.driver as C:\Users\bnesteruk\.m2\repository\webdriver\geckodriver\win64\0.15.0\geckodriver.exe