小编典典

org.openqa.selenium.json.JsonOutput.write(Ljava / lang / Object; Ljava / lang / reflect / Type;)由于JsonException:试图关闭不完整的json流

selenium

我将TestNG更新为6.14.3并将Selenium更新为3.13.0后,收到上述Json异常。我正在使用ChromeDriver()实现自动化。以下是有关我的代码的简要说明:

@BeforeSuite:
System.setProperty("webdriver.chrome.driver", "path to chrome driver");

@BeforeMethod:
driver = new ChromeDriver();

@AfterMethod:
driver.quit();

我以前的版本分别是TestNG和Selenium的6.11.0和3.7.1。

当代码尝试启动WebDriver会话时,将出现异常。

完整的例外是:

java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;Ljava/lang/reflect/Type;)Lorg/openqa/selenium/json/JsonOutput;
  at org.openqa.selenium.remote.NewSessionPayload.writeTo(NewSessionPayload.java:247)
  at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:69)
  at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:136)
  at org.openqa.selenium.remote.service.DriverCommandExecutor.execute(DriverCommandExecutor.java:83)
  at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:548)
  at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:212)
  at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:130)
  at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:181)
  at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:168)
  at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:123)
  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.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
  at org.testng.internal.MethodInvocationHelper.invokeMethodConsideringTimeout(MethodInvocationHelper.java:59)
  at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:458)
  at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:222)
  at org.testng.internal.Invoker.invokeMethod(Invoker.java:523)
  at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:719)
  at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:989)
  at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
  at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
  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)
Suppressed: org.openqa.selenium.json.JsonException: Attempting to close incomplete json stream
Build info: version: '3.13.0', revision: '2f0d292', time: '2018-06-25T15:24:21.231Z'
Driver info: driver.version: ChromeDriver
    at org.openqa.selenium.json.JsonOutput.close(JsonOutput.java:263)
    at org.openqa.selenium.remote.NewSessionPayload.writeTo(NewSessionPayload.java:270)

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2020-06-26

共1个答案

小编典典

此错误信息:

java.lang.NoSuchMethodError: org.openqa.selenium.json.JsonOutput.write(Ljava/lang/Object;Ljava/lang/reflect/Type;)Lorg/openqa/selenium/json/JsonOutput;
.
Suppressed: org.openqa.selenium.json.JsonException: Attempting to close incomplete json stream

…表示在JVM尝试转义某些字符时引发了 java.lang.NoSuchMethodError

在缺少以下与您的 测试环境 有关的信息的情况下,很难分析错误:

  • selenium-server-standalone-3.13.0.jarselenium-java-3.13.0 客户端。
  • JARMavenGradle

但是此错误来自以下源代码:

  public void close() {
    if (appendable instanceof Closeable) {
      try {
    ((Closeable) appendable).close();
      } catch (IOException e) {
    throw new JsonException(e);
      }
    }

    if (!(stack.getFirst() instanceof Empty)) {
      throw new JsonException("Attempting to close incomplete json stream");
    }
  }

原因

可能的原因可能是以下之一:

  • 通过 selenium-server-standalone-3.13.0.jar*selenium-java-3.13.0 客户端jar 存在多个 与Selenium相关的 jar。 ***
  • 通过 JAR*Maven 和/或 Gradle 存在多个 与硒相关的jar *
  • 存在 gson-2.8.2.jar 作为Selenium v​​3.13.0发行说明中明确提到:
    * Introduced our own JSON parser and outputter, allowing GSON to be removed from our dependencies.
    

  • 如果使用手动下载的 JAR 文件,请删除所有与 Selenium 相关的 外部JAR, 然后添加新下载的一个。
  • 如果使用 MavenGradle ,请执行以下步骤:
    • 通过CLI :(mvn clean清除以前的依赖项)
    • 通过CLI :(mvn install安装必需的依赖项)
    • 通过CLI :(mvn test执行测试套件)
2020-06-26