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java - org.openqa.selenium.NoSuchSessionException : Session ID is null. 在调用 quit() 后使用 WebDriver?

转载 作者:搜寻专家 更新时间:2023-11-01 03:17:42 27 4
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我已经进行了一些搜索,但仍然遇到同样的问题。我相信这可能是由于我的 webdriver 是静态的?我不太确定...

在我的主类中,我包含了@BeforeTest@AfterTest@BeforeTest 包括根据我的 XML 文件启动新的浏览器@AfterTest 包含 driver.quit(),它应该终止 session /驱动程序,以便第二个测试可以从 @BeforeTest 获得干净的驱动程序,没有?

这是我的浏览器声明:

public class Browser {  
public static WebDriver driver;
//Variable initialization
public static String title;
public static String url;
public static String currentBrowser;
public static boolean jseWorkAround;

public Browser(){
driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
}

//Browser launch
public static void launch(String browser){
if(browser.equalsIgnoreCase("firefox")){
driver = new FirefoxDriver();
currentBrowser = "Firefox/";
jseWorkAround = false;
System.out.println("Firefox Selected");
} else if (browser.equalsIgnoreCase("chrome")){
driver = new ChromeDriver();
currentBrowser = "Chrome/";
jseWorkAround = false;
System.out.println("Chrome Selected");
} else if (browser.equalsIgnoreCase("edge")){
driver = new EdgeDriver();
currentBrowser = "Edge/";
jseWorkAround = true;
System.out.println("Edge selected");
} else if (browser.equalsIgnoreCase("ie")){
driver = new InternetExplorerDriver();
currentBrowser = "IE/";
jseWorkAround = true;
System.out.println("IE Driver Selected");
} else if (browser.equalsIgnoreCase("background")){
driver = new PhantomJSDriver();
currentBrowser = "Background/";
jseWorkAround = false;
System.out.println("Background selected");
} else {
throw new IllegalArgumentException("Invalid Browser");
}
}

public static void quit(){
driver.quit();
}

public static void goToPage(String pageurl){
driver.get(pageurl);
}

这是一个随机样本测试:

    @Parameters({"browser"})
@BeforeTest
public void browserSelection(String browser){
Browser.launch(browser);
}

@AfterTest
public void cleanupAfterTest(){
Print.line("Test complete. Cleaning up...");
Browser.quit();
}

@Test
public void Test1() {
Browser.goToPage("http://www.google.com");
Screenshot.page("Goes to google");

}
@Test
public void Test2() {
Browser.goToPage("http://www.yahoo.com");
Screenshot.page("Goes to yahoo");

}

我注意到当事情开始失败并出现错误“调用退出后调用 webdriver”时,它总是第二次测试结束。浏览器之间的测试根据我的 testng.xml 文件中提到的顺序按顺序进行。如果我先运行 firefox,然后运行 ​​chrome,chrome 测试将在最后一个 @Test 上失败。然而,如果我先运行 chrome,然后运行 ​​firefox,则 firefox 将在最后一个 @Test 上失败。

下面是错误信息...

org.openqa.selenium.NoSuchSessionException: Session ID is null. Using WebDriver after calling quit()?
Build info: version: 'unknown', revision: '1969d75', time: '2016-10-18 09:43:45 -0700'
System info: host: 'DESKTOP-5ED0H7O', ip: '10.0.9.239', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_121'
Driver info: driver.version: RemoteWebDriver
at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:130)
at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:82)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:601)
at org.openqa.selenium.remote.RemoteWebDriver.executeScript(RemoteWebDriver.java:537)
at utility.Scroll.toText(Scroll.java:43)
at tests.TestCases.TCID20(TestCases.java:390)
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:108)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:661)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:869)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:126)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
at org.testng.TestRunner.privateRun(TestRunner.java:744)
at org.testng.TestRunner.run(TestRunner.java:602)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:380)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:375)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:340)
at org.testng.SuiteRunner.run(SuiteRunner.java:289)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1301)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1226)
at org.testng.TestNG.runSuites(TestNG.java:1144)
at org.testng.TestNG.run(TestNG.java:1115)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:230)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:76)

这种随机失败严重损害了我的进步。如果我在我的 XML 文件上一次只启用一个浏览器而没有其他浏览器在线,则不会失败。

最佳答案

据我所知,您的问题是@test 在加载浏览器之前运行(您必须增加等待时间)。另一件事是您没有添加任何优先级。首先,您获取浏览器的方式。你必须使用 geckodriver、chromedriver 等。

尝试像下面这样获取浏览器

if (browser.equalsIgnoreCase("chrome")){
System.setProperty("webdriver.chrome.driver", "/Path/ToChromeDriver/chromedriver.exe");
driver = new ChromeDriver();
System.out.println("Chrome Selected");
}

像下面这样添加优先级

Browser browser;

@Parameters({"browser"})
@BeforeTest
public void browserSelection(String browser){
browser.launch(browser);
thread.sleep(5000);//Not recommended but timeout also may be an issue if so increase implicitly wait time
}

@AfterTest
public void cleanupAfterTest(){
Print.line("Test complete. Cleaning up...");
browser.quit();
}

@Test( priority = 1, description = "Test 1")
public void setUserName(){
Browser.goToPage("http://www.google.com");
Screenshot.page("Goes to google");
}

@Test(priority = 2,description = "Test 2")
public void setPassword(){
Browser.goToPage("http://www.yahoo.com");
Screenshot.page("Goes to yahoo");
}

关于java - org.openqa.selenium.NoSuchSessionException : Session ID is null. 在调用 quit() 后使用 WebDriver?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42823201/

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