ClassCaseException with GWTTestSuite

[Arthur Kalmenson]

Hello everyone,

In my previous project I used GWTTestSuite and everything worked very well. I'm working on another project and GWTTestSuite refuses to work. My test suite looks as follows:

package com.sinai.maru;

import junit.framework.Test;

import junit.framework.TestSuite;

import com.google.gwt.junit.tools.GWTTestSuite;

import com.sinai.maru.client.view.ApplicationHeaderViewGwtTest;

public class GwtTestMediarUploadSuite extends GWTTestSuite {

public static Test suite() {

TestSuite suite = new TestSuite(

"GWTTestSuite for running all GWTTestCases.");

suite.addTestSuite(ApplicationHeaderViewGwtTest.class);

return suite;

}

}

When I run gwt:test I get the follow:

ares:mediar-upload arthur$ mvn gwt:test

[INFO] Scanning for projects...

[INFO] ------------------------------------------------------------------------

[INFO] Building MediAR Upload Project

[INFO]    task-segment: [gwt:test]

[INFO] ------------------------------------------------------------------------

[INFO] [gwt:test]

[INFO] using GWT jars from project dependencies : 1.6.4

[INFO] Unpack native libraries required to run GWT

[INFO] establishing classpath list (scope = test)

[ERROR] Error: java.lang.ClassCastException: class com.sinai.maru.GwtTestMediarUploadSuite

[INFO] ------------------------------------------------------------------------

[ERROR] BUILD ERROR

[INFO] ------------------------------------------------------------------------

[INFO] There was test failures.

[INFO] ------------------------------------------------------------------------

[INFO] For more information, run Maven with the -e switch

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 2 seconds

[INFO] Finished at: Thu Jun 25 16:07:15 EDT 2009

[INFO] Final Memory: 9M/18M

[INFO] ------------------------------------------------------------------------

The execution looks as follows with the error stacktrace turned on:

ares:mediar-upload arthur$ mvn -e gwt:test

+ Error stacktraces are turned on.

[INFO] Scanning for projects...

[INFO] ------------------------------------------------------------------------

[INFO] Building MediAR Upload Project

[INFO]    task-segment: [gwt:test]

[INFO] ------------------------------------------------------------------------

[INFO] [gwt:test]

[INFO] using GWT jars from project dependencies : 1.6.4

[INFO] Unpack native libraries required to run GWT

[INFO] establishing classpath list (scope = test)

[ERROR] Error: java.lang.ClassCastException: class com.sinai.maru.GwtTestMediarUploadSuite

[INFO] ------------------------------------------------------------------------

[ERROR] BUILD ERROR

[INFO] ------------------------------------------------------------------------

[INFO] There was test failures.

[INFO] ------------------------------------------------------------------------

[INFO] Trace

org.apache.maven.lifecycle.LifecycleExecutionException: There was test failures.

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:703)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:553)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:523)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:371)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:332)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:181)

at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:356)

at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:137)

at org.apache.maven.cli.MavenCli.main(MavenCli.java:356)

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:585)

at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)

at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)

at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

at org.codehaus.classworlds.Launcher.main(Launcher.java:375)

Caused by: org.apache.maven.plugin.MojoExecutionException: There was test failures.

at org.codehaus.mojo.gwt.shell.TestMojo.doExecute(TestMojo.java:140)

at org.codehaus.mojo.gwt.shell.AbstractGwtShellMojo.execute(AbstractGwtShellMojo.java:129)

at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:483)

at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:678)

... 16 more

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 2 seconds

[INFO] Finished at: Thu Jun 25 16:07:52 EDT 2009

[INFO] Final Memory: 9M/18M

[INFO] ------------------------------------------------------------------------

What is it trying to cast it to that it can't? Any help would be greatly appreciated.

Best regards,

--
Arthur Kalmenson

[Arthur Kalmenson]

P.S. Renaming it to remove GwtTest (i.e. so it doesn't think it's a regular GWTTestCase) didn't do anything. I still get the ClassCastException.

--
Arthur Kalmenson

[Arthur Kalmenson]

I tried creating a new project using the archetype and adding a GWTTestSuite to it. Even with the new project I'm still getting a ClassCastException. I've attached the test project, hopefully that'll help. Thanks again.

Best regards,
--
Arthur Kalmenson

[Arthur Kalmenson]

Sorry for the spam, but I just tried running the GWTTestSuite through Eclipse using the regular JUnit runner (after explicitly adding the gwt-dev dependency and adding folders to the class path) and it works fine. I can't seem to reproduce the ClassCastException.

I tried looking at the source of the mojo and it fails in the doExecute( runtime ) line 129 of AbstractGwtShellMojo. That didn't help me though...

--
Arthur Kalmenson

[Dean Povey]

Try addTest rather than addTestSuite.

Cheers

Dean

[Arthur Kalmenson]

How does that work exactly? Add test by test? I'm not sure why adding
the test class itself via addTestSuite doesn't work.

--
Arthur Kalmenson

[Dean Povey]

Sorry my mistake, that clearly doesn't work.  The problem is you should be doing:

package com.sinai.maru;

import junit.framework.Test;
import junit.framework.TestSuite;
import com.google.gwt.junit.tools.GWTTestSuite;
import com.sinai.maru.client.view.ApplicationHeaderViewGwtTest;

public class GwtTestMediarUploadSuite extends GWTTestSuite {

    public static Test suite() {

        GWTTestSuite suite = new GWTTestSuite(

        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

            "GWTTestSuite for running all GWTTestCases.");
            suite.addTestSuite(ApplicationHeaderViewGwtTest.class);

            return suite;

    }

}

Dean.

[Dean Povey]

Err and I missed that you should be extending TestCase not GWTTestSuite.

Dean.

[Dean Povey]

I should add that all of that is contrary to what the GWT documentation says you should do, but does fix the ClassCastException.  I worked this out once and then didn't bother to find out why.

Dean.

[Arthur Kalmenson]

Hooray!! You're a life saver Dean.

Here's what my class looks like:


public class GwtCmsUiSuite extends TestCase {
public static Test suite() {
GWTTestSuite suite = new GWTTestSuite();
suite.addTestSuite(SomeGwtTest.class);
return suite;
}
}

Thanks again.

Best regards,
--
Arthur Kalmenson