[WW-3826] Unit Testing A Portlet Action Using StrutsTestCase Causes A NullPointerException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.4
• Fix Version/s: 2.3.16
• Component/s: Plugin - Portlet

Environment

JUnit 4.8.2 - Struts version 2.3.4

• Assignee: Bruce Allen Phillips
• Reporter: Bruce Phillips
• Created: 28/May/12 14:14
• Updated: 08/Dec/13 17:21
• Resolved: 02/Aug/13 16:51

Description

When running a unit test of a Struts portlet Action using StrutsTestCase the test causes an error -

java.lang.NullPointerException at org.apache.struts2.portlet.interceptor.PortletStateInterceptor.intercept(PortletStateInterceptor.java:52)

(see below for complete stack trace)

The same test when run with Struts portlet plugin version 2.2.1 passes.

You can download an example application here: http://www.brucephillips.name/struts/Struts2CRUDPortletExample_Finish.zip. Unzip the example. In the project's root folder run mvn -e clean test. The test will pass.

Modify pom.xml in the project to set the version number of Struts to 2.3.4. Remove the dependency on javaassist. Save the pom.xml

In the project's root folder run mvn -e clean test. The test will error. View the test report in target/surfire-reports.

-------------------------------------------------------------------------------
Test set: com.struts2.tutorial.action.ListEmployeeActionTest
-------------------------------------------------------------------------------
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.185 sec <<< FAILURE!
testExecute(com.struts2.tutorial.action.ListEmployeeActionTest) Time elapsed: 0.998 sec <<< ERROR!
java.lang.NullPointerException
at org.apache.struts2.portlet.interceptor.PortletStateInterceptor.intercept(PortletStateInterceptor.java:52)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at com.struts2.tutorial.action.ListEmployeeActionTest.testExecute(ListEmployeeActionTest.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:107)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)