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RootPanel.get("aaa") in Junit test throws NPE
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Владимир Петрухин  
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 More options Jun 26, 12:45 pm
From: Владимир Петрухин <mylonglongn...@gmail.com>
Date: Fri, 26 Jun 2009 09:45:29 -0700 (PDT)
Local: Fri, Jun 26 2009 12:45 pm
Subject: RootPanel.get("aaa") in Junit test throws NPE
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I generate a simple project with maven gwt plugin:

mvn archetype:generate \
   -DarchetypeGroupId=org.codehaus.mojo \
   -DarchetypeArtifactId=gwt-maven-plugin \
   -DarchetypeVersion=1.1 \
   -DgroupId=myGroupId \
   -DartifactId=myArtifactId

In GwtTestSample I change:

   public void testSomething()
   {
      final Label label = new Label ( "gwt-maven-plugin Archetype ::
Project myGroupId.myArtifactId" );
      RootPanel.get("aaa").add( label );
   }

And in Application.html i add <div id="aaa"></div>

All works ok, but in JUnit test (mvn gwt:test) RootPanel.get("aaa")
throws

java.lang.NullPointerException
[INFO]  at myGroupId.client.GwtTestSample.testSomething
(GwtTestSample.java:23)
[INFO]  at myGroupId.client.__GwtTestSample_unitTestImpl.doRunTest
(transient source for myGroupId.client.__GwtTestSample_unitTestImpl:7)
[INFO]  at junit.framework.TestCase.runTest(TestCase.java:62)
[INFO]  at com.google.gwt.junit.client.GWTTestCase.runBare
(GWTTestCase.java:206)
[INFO]  at com.google.gwt.junit.client.GWTTestCase.__doRunTest
(GWTTestCase.java:137)
[INFO]  at com.google.gwt.junit.client.impl.GWTRunner.runTest
(GWTRunner.java:188)
[INFO]  at com.google.gwt.junit.client.impl.GWTRunner.doRunTest
(GWTRunner.java:163)
[INFO]  at com.google.gwt.junit.client.impl.GWTRunner.access$3
(GWTRunner.java:157)
[INFO]  at com.google.gwt.junit.client.impl.GWTRunner
$JUnitHostListener.onSuccess(GWTRunner.java:61)
[INFO]  at com.google.gwt.junit.client.impl.GWTRunner
$JUnitHostListener.onSuccess(GWTRunner.java:1)
[INFO]  at
com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceiv ed
(RequestCallbackAdapter.java:215)
[INFO]  at
com.google.gwt.http.client.Request.fireOnResponseReceivedImpl
(Request.java:264)
[INFO]  at com.google.gwt.http.client.Request.fireOnResponseReceived
(Request.java:229)
[INFO]  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[INFO]  at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
[INFO]  at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
[INFO]  at java.lang.reflect.Method.invoke(Method.java:597)
[INFO]  at com.google.gwt.dev.shell.MethodAdaptor.invoke
(MethodAdaptor.java:103)
[INFO]  at com.google.gwt.dev.shell.moz.MethodDispatch.invoke
(MethodDispatch.java:80)
[INFO]  at org.eclipse.swt.internal.gtk.OS._g_main_context_iteration
(Native Method)
[INFO]  at org.eclipse.swt.internal.gtk.OS.g_main_context_iteration
(OS.java:1428)
[INFO]  at org.eclipse.swt.widgets.Display.readAndDispatch
(Display.java:2840)
[INFO]  at com.google.gwt.dev.SwtHostedModeBase.processEvents
(SwtHostedModeBase.java:235)
[INFO]  at com.google.gwt.dev.HostedModeBase.pumpEventLoop
(HostedModeBase.java:558)
[INFO]  at com.google.gwt.junit.JUnitShell.runTestImpl(JUnitShell.java:
652)
[INFO]  at com.google.gwt.junit.JUnitShell.runTest(JUnitShell.java:
346)
[INFO]  at com.google.gwt.junit.client.GWTTestCase.runTest
(GWTTestCase.java:219)
[INFO]  at junit.framework.TestCase.runBare(TestCase.java:134)
[INFO]  at junit.framework.TestResult$1.protect(TestResult.java:110)
[INFO]  at junit.framework.TestResult.runProtected(TestResult.java:
128)
[INFO]  at junit.framework.TestResult.run(TestResult.java:113)
[INFO]  at junit.framework.TestCase.run(TestCase.java:124)
[INFO]  at com.google.gwt.junit.client.GWTTestCase.run
(GWTTestCase.java:132)
[INFO]  at junit.framework.TestSuite.runTest(TestSuite.java:232)
[INFO]  at junit.framework.TestSuite.run(TestSuite.java:227)
[INFO]  at org.codehaus.mojo.gwt.test.MavenTestRunner.doRun
(MavenTestRunner.java:105)
[INFO]  at junit.textui.TestRunner.start(TestRunner.java:180)
[INFO]  at org.codehaus.mojo.gwt.test.MavenTestRunner.main
(MavenTestRunner.java:63)

Help.
Thanks.


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hazy1  
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 More options Jul 3, 10:58 pm
From: hazy1 <matt.egyh...@gmail.com>
Date: Fri, 3 Jul 2009 19:58:36 -0700 (PDT)
Local: Fri, Jul 3 2009 10:58 pm
Subject: Re: RootPanel.get("aaa") in Junit test throws NPE
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I have the same problem.  No solution/work around that I know of.

On Jun 26, 12:45 pm, Владимир Петрухин <mylonglongn...@gmail.com>
wrote:


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hazy1  
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 More options Jul 6, 9:22 pm
From: hazy1 <matt.egyh...@gmail.com>
Date: Mon, 6 Jul 2009 18:22:56 -0700 (PDT)
Local: Mon, Jul 6 2009 9:22 pm
Subject: Re: RootPanel.get("aaa") in Junit test throws NPE
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The work around I ended up using is to parameterize the RootPanel.get
("xxx") call with a public static member.  In my JUnit test cases, I
set this public static to null prior to calling onModuleLoad.

On Jul 3, 10:58 pm, hazy1 <matt.egyh...@gmail.com> wrote:


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