UnhandledAlertException 具体如何处理？ [关闭]

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我正在使用这种方法来处理预期的警报，但最后测试失败了。 在上次部署之前它工作正常。 我也放了等待13秒

try {
        wait(2000);
        wait.until(ExpectedConditions.alertIsPresent());
        Alert alert = driver.switchTo().alert();
        String alertText = alert.getText();
        System.out.println("The alert message: "+alertText);
        alert.accept();
    } catch (Exception a){
        System.out.println("Exception cause = " + a.getCause());
        System.out.println("Exception message = " + a.getMessage());
        a.printStackTrace();
    }

结果是：

异常原因 = null 异常消息 = Session ID 为 null。 调用 quit() 后使用 WebDriver？ 构建信息：版本：'3.8.1'，修订：'6e95a6684b'，时间：'2017-12-01T18:33:54.468Z' 系统信息：主机：'Selenium'，ip：'......' , os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_211' 驱动信息: driver.version: RemoteWebDriver org.openqa.Z8E00596ADUC4878Session536FFZF.D8 : Session ID 是 null。 调用 quit() 后使用 WebDriver？ 构建信息：版本：'3.8.1'，修订：'6e95a6684b'，时间：'2017-12-01T18:33:54.468Z' 系统信息：主机：'Selenium'，ip：'192.168.1.10'，操作系统。名称：'Windows 10'，os.arch：'amd64'，os.version：'10.0'，java.version：'1.8.0_211' 驱动程序信息：驱动程序版本：org.openqa.Z8E00596AD8DE2215628F8Dremote.8 的 RemoteWebDriver .execute(HttpCommandExecutor.java:131) 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.execute(RemoteWebDriver.java:658) at org.openqa.selenium.remote.RemoteWebDriver$RemoteTargetLocator.alert (RemoteWebDriver.java:987) at org.openqa.selenium.support.ui.ExpectedConditions$28.apply(ExpectedConditions.java:808) at org.openqa.selenium.support.ui.ExpectedConditions$28.apply(ExpectedConditions.java:804 ) at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:208) at com.model.Actions.model_CommonFunctions.handleAlert(model_CommonFunctions.java:1075) at com.model.Actions.AppConsole.confirmAccess.在 com.model.StepDefinition.confirmAccess_request_stepDefinition.approves_thecon 93F725A07423FE1C889F448B33D21F46Z:45) 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 cucumber.runtime.Utils$1.call(Utils.java:40) at cucumber.runtime.Timeout.timeout(Timeout.java:16) at cucumber.runtime.Utils .invoke(Utils.java:34) at cucumber.runtime.java.JavaStepDefinition.execute(JavaStepDefinition.java:38) at cucumber.runtime.StepDefinitionMatch.runStep( StepDefinitionMatch.java:37) at cucumber.runtime.Runtime.runStep(Runtime.java:300) at cucumber.runtime.model.StepContainer.runStep(StepContainer.java:44) at cucumber.runtime.model.StepContainer.runSteps(StepContainer .java:39) at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:44) at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:102) at org.junit.runners.Suite.runChild( Suite.java:128) 在 org.junit.runners.Suite.runChild(Suite.Z93F725A07423 FE1C889F448B33D21F46Z:27) 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 cucumber.runtime.junit.ExamplesRunner.run(ExamplesRunner.java:59) at org.junit.runners.Suite.runChild(Suite. java:128) at org.junit.runners.Suite.runChild(Suite.java:27) 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 cucumber.runtime.junit.ScenarioOutlineRunne r.run(ScenarioOutlineRunner.java:53) at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:63) at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:18) 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.Z93F725A07423FE1C889F448B33D21 F46Z:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70) at cucumber.api.junit.Cucumber.runChild(Cucumber .java:95) at cucumber.api.junit.Cucumber.runChild(Cucumber.java:38) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.计划（ParentRunner.java:71）在 org.junit.runners.ParentRunner.runChil dren(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.internal .runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java :363) at cucumber.api.junit.Cucumber.run(Cucumber.java:100) at org.apache.maven.surefire.junit4.JU nit4Provider.execute(JUnit4Provider.java:365) at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:272) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java: 236) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:386) at org.apache.maven .surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:323) 在 org.ZB6EFD606D118D0F6206 6E31419FF04CCZ.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:143)