我以前从未研究过这个问题，但我想要运行一个现有的项目，然后添加一些额外的功能。
我安装如下：
-Eclipse Kepler -Java JDK -Maven 3.3.9 -Maven Eclipse中的插件 - Firefox中的Selenium IDE Eclipse中的-Cucumberplugin
＆＃34;项目＆＃34;已成功构建运行，例如＆＃34; Eclipse - ＆gt;运行As-＆gt; Maven clean＆＃34;或＆＃34; cmd - ＆gt; mvn validate＆＃34;。
我可以运行＆＃34;项目＆＃34;例如＆＃34; Eclipse - ＆gt;运行As-＆gt; Maven测试＆＃34;。
当我运行＆＃34;项目＆＃34;时： -.java类进入@Before方法，根据使用的WebDriver打开我的选择浏览器。 -.java类输入@Given方法并打开正确的URL。
在此之后有很多@When和@Then以及更多@Given，但这些似乎永远不会被执行。例如，接下来应该发生的事情是应该进行一些输入并点击一个按钮但没有任何反应。当我关闭浏览器时Eclipse - ＆gt;控制台显示.feature文件中的所有功能（Test Project / src / test / resources / com / company / test），然后显示以下错误。
java.lang.NullPointerException
at org.openqa.selenium.support.ui.ExpectedConditions.elementIfVisible(ExpectedConditions.java:227)
at org.openqa.selenium.support.ui.ExpectedConditions.access$100(ExpectedConditions.java:39)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:130)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:126)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:208)
at com.company.test.WebTestSteps.AssertExists(WebTestSteps.java:81)
at com.company.test.WebTestSteps.I_should_be_on_the_page(WebTestSteps.java:180)
at ?.Then I should be on the "Please login using your account information" page(com/company/test/OpenAllWindows.feature:6)
org.openqa.selenium.WebDriverException: chrome not reachable
(Session info: chrome=53.0.2785.116)
(Driver info: chromedriver=2.24.417431 (9aea000394714d2fbb20850021f6204f2256b9cf),platform=Windows NT 10.0.10586 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 103 milliseconds
Build info: version: '2.41.0', revision: '3192d8a6c4449dc285928ba024779344f5423c58', time: '2014-03-27 11:29:39'
System info: host: 'Hafjall', ip: '192.168.2.204', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_101'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, networkConnectionEnabled=false, chrome={chromedriverVersion=2.24.417431 (9aea000394714d2fbb20850021f6204f2256b9cf), userDataDir=C:\Users\User~1\AppData\Local\Temp\scoped_dir7884_25604}, takesHeapSnapshot=true, pageLoadStrategy=normal, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=53.0.2785.116, platform=XP, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: 37a0d1f5514c5f53158d6742152a5337
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:595)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:610)
at org.openqa.selenium.remote.RemoteWebDriver.close(RemoteWebDriver.java:459)
at com.company.test.WebTestSteps.tearDown(WebTestSteps.java:139)
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:34)
at cucumber.runtime.Timeout.timeout(Timeout.java:13)
at cucumber.runtime.Utils.invoke(Utils.java:30)
at cucumber.runtime.java.JavaHookDefinition.execute(JavaHookDefinition.java:59)
at cucumber.runtime.Runtime.runHookIfTagsMatch(Runtime.java:221)
at cucumber.runtime.Runtime.runHooks(Runtime.java:209)
at cucumber.runtime.Runtime.runAfterHooks(Runtime.java:203)
at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:50)
at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:83)
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:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:89)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:40)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at cucumber.api.junit.Cucumber.run(Cucumber.java:94)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Tests run: 496, Failures: 0, Errors: 3, Skipped: 492, Time elapsed: 34.881 sec <<< FAILURE!
Then I should be on the "Please login using your account information" page(Scenario: Test) Time elapsed: 0.006 sec <<< ERROR!
java.lang.NullPointerException
at org.openqa.selenium.support.ui.ExpectedConditions.elementIfVisible(ExpectedConditions.java:227)
at org.openqa.selenium.support.ui.ExpectedConditions.access$100(ExpectedConditions.java:39)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:130)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:126)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:208)
at com.company.test.WebTestSteps.AssertExists(WebTestSteps.java:81)
at com.company.test.WebTestSteps.I_should_be_on_the_page(WebTestSteps.java:180)
at ?.Then I should be on the "Please login using your account information" page(com/company/test/OpenAllWindows.feature:6)
Scenario: Test Time elapsed: 0.007 sec <<< ERROR!
java.lang.NullPointerException
at org.openqa.selenium.support.ui.ExpectedConditions.elementIfVisible(ExpectedConditions.java:227)
at org.openqa.selenium.support.ui.ExpectedConditions.access$100(ExpectedConditions.java:39)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:130)
at org.openqa.selenium.support.ui.ExpectedConditions$4.apply(ExpectedConditions.java:126)
at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:208)
at com.company.test.WebTestSteps.AssertExists(WebTestSteps.java:81)
at com.company.test.WebTestSteps.I_should_be_on_the_page(WebTestSteps.java:180)
at ?.Then I should be on the "Please login using your account information" page(com/company/test/OpenAllWindows.feature:6)
Scenario: Test Time elapsed: 0.244 sec <<< ERROR!
org.openqa.selenium.WebDriverException: chrome not reachable
(Session info: chrome=53.0.2785.116)
(Driver info: chromedriver=2.24.417431 (9aea000394714d2fbb20850021f6204f2256b9cf),platform=Windows NT 10.0.10586 x86_64) (WARNING: The server did not provide any stacktrace information)
Command duration or timeout: 103 milliseconds
Build info: version: '2.41.0', revision: '3192d8a6c4449dc285928ba024779344f5423c58', time: '2014-03-27 11:29:39'
System info: host: 'Hafjall', ip: '192.168.2.204', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_101'
Driver info: org.openqa.selenium.chrome.ChromeDriver
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, networkConnectionEnabled=false, chrome={chromedriverVersion=2.24.417431 (9aea000394714d2fbb20850021f6204f2256b9cf), userDataDir=C:\Users\User~1\AppData\Local\Temp\scoped_dir7884_25604}, takesHeapSnapshot=true, pageLoadStrategy=normal, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=53.0.2785.116, platform=XP, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: 37a0d1f5514c5f53158d6742152a5337
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)
at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:595)
at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:610)
at org.openqa.selenium.remote.RemoteWebDriver.close(RemoteWebDriver.java:459)
at com.company.test.WebTestSteps.tearDown(WebTestSteps.java:139)
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:34)
at cucumber.runtime.Timeout.timeout(Timeout.java:13)
at cucumber.runtime.Utils.invoke(Utils.java:30)
at cucumber.runtime.java.JavaHookDefinition.execute(JavaHookDefinition.java:59)
at cucumber.runtime.Runtime.runHookIfTagsMatch(Runtime.java:221)
at cucumber.runtime.Runtime.runHooks(Runtime.java:209)
at cucumber.runtime.Runtime.runAfterHooks(Runtime.java:203)
at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:50)
at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:83)
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:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:89)
at cucumber.api.junit.Cucumber.runChild(Cucumber.java:40)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at cucumber.api.junit.Cucumber.run(Cucumber.java:94)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Results :
Tests in error:
Then I should be on the "Please login using your account information" page(Scenario: Test)
Scenario: Test
Scenario: Test: chrome not reachable(..)
Tests run: 496, Failures: 0, Errors: 3, Skipped: 492
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 38.085 s
[INFO] Finished at: 2016-09-16T09:15:16+02:00
[INFO] Final Memory: 19M/250M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project WebTests: There are test failures.
[ERROR]
[ERROR] Please refer to E:\WebTest\target\surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException