Re: [Webtest] NullpointerException in a custom step

Sat, 26 Sep 2009 09:57:03 -0700 

difficult to say without seeing the code for class
StoreOrderId

cheers
Dierk

Am 26.09.2009 um 17:47 schrieb Thomas Vöcking:


Hi, all,
I'm trying to set up a custom step for my webtest project by extending a 
new class from StoreXPath.

But all I get is the following NullpointerException:

/home/thomas/development/canoo/webtest.xml:11: Unexpected exception
caught: org.apache.tools.ant.BuildException
at com.canoo.webtest.steps.StepUtil.handleException(StepUtil.java: 122) 
        at com.canoo.webtest.steps.Step.handleException(Step.java:387)
        at com.canoo.webtest.steps.Step.execute(Step.java:118)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com.canoo.webtest.ant.WebtestTask.executeSteps(WebtestTask.java: 236) 
        at com.canoo.webtest.ant.WebtestTask.execute(WebtestTask.java:208)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java: 1337) 
        at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
at org .apache .tools .ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: /home/thomas/development/canoo/firstWebTest.xml:18: java.lang.NullPointerException at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 116) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com .canoo .webtest.ant.TestStepSequence.executeSteps(TestStepSequence.java:43) at com .canoo.webtest.ant.TestStepSequence.doExecute(TestStepSequence.java: 31) 
        at com.canoo.webtest.steps.Step.execute(Step.java:103)
        ... 25 more
Caused by: java.lang.NullPointerException
at com .canoo .webtest .engine .WebTestException.readUrlCurrentResponse(WebTestException.java:29) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 25) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 40) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 48) at com .canoo .webtest .engine.StepExecutionException.<init>(StepExecutionException.java:25) 
        at com.canoo.webtest.steps.Step.checkContextDefined(Step.java:129)
        at com.canoo.webtest.steps.Step.execute(Step.java:99)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        ... 29 more
--- Nested Exception ---
/home/thomas/development/canoo/firstWebTest.xml:18: java.lang.NullPointerException at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 116) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com .canoo .webtest.ant.TestStepSequence.executeSteps(TestStepSequence.java:43) at com .canoo.webtest.ant.TestStepSequence.doExecute(TestStepSequence.java: 31) 
        at com.canoo.webtest.steps.Step.execute(Step.java:103)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com.canoo.webtest.ant.WebtestTask.executeSteps(WebtestTask.java: 236) 
        at com.canoo.webtest.ant.WebtestTask.execute(WebtestTask.java:208)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java: 1337) 
        at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
at org .apache .tools .ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)
Caused by: java.lang.NullPointerException
at com .canoo .webtest .engine .WebTestException.readUrlCurrentResponse(WebTestException.java:29) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 25) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 40) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 48) at com .canoo .webtest .engine.StepExecutionException.<init>(StepExecutionException.java:25) 
        at com.canoo.webtest.steps.Step.checkContextDefined(Step.java:129)
        at com.canoo.webtest.steps.Step.execute(Step.java:99)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        ... 29 more
--- Nested Exception ---
java.lang.NullPointerException
at com .canoo .webtest .engine .WebTestException.readUrlCurrentResponse(WebTestException.java:29) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 25) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 40) at com .canoo.webtest.engine.WebTestException.<init>(WebTestException.java: 48) at com .canoo .webtest .engine.StepExecutionException.<init>(StepExecutionException.java:25) 
        at com.canoo.webtest.steps.Step.checkContextDefined(Step.java:129)
        at com.canoo.webtest.steps.Step.execute(Step.java:99)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com .canoo .webtest.ant.TestStepSequence.executeSteps(TestStepSequence.java:43) at com .canoo.webtest.ant.TestStepSequence.doExecute(TestStepSequence.java: 31) 
        at com.canoo.webtest.steps.Step.execute(Step.java:103)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
at com.canoo.webtest.ant.WebtestTask.executeSteps(WebtestTask.java: 236) 
        at com.canoo.webtest.ant.WebtestTask.execute(WebtestTask.java:208)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java: 288) 
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun .reflect .NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun .reflect .DelegatingMethodAccessorImpl .invoke(DelegatingMethodAccessorImpl.java:25) 
        at java.lang.reflect.Method.invoke(Method.java:597)
at org .apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java: 106) 
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java: 1337) 
        at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
at org .apache .tools .ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) 
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.Main.runBuild(Main.java:758)
        at org.apache.tools.ant.Main.startAnt(Main.java:217)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)



This is the interesting part of my build-file:

<project name="SimpleTest" basedir="." default="wt.full">

 <property name="webtest.home" location="." />
 <import file="${webtest.home}/webtest.xml"/>


 <target name="wt.testInWork">
   <webtest name="Test Case">

        <config useInsecureSSL="true" />
<taskdef name="myCustomStep" classname="de.mycompany.webtests.support.StoreOrderId" classpathref="wt.defineTasks.classpath.webtest" /> 

        <!-- Homepage -->
        <invoke url="http://localhost"; />
        <myCustomStep xpath="//*"/>
        ...


Does anybody have an idea what I'm doing wrong?

Regards,
Thomas

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