attempting to unit test and something with RoboGuice.newDefaultRoboModule() is failing with Roboguice 2.0b3 and Robolectric

Question

I've been looking at the astroboy example code and documentation for RoboGuice 2, and I'm honestly stumped. I hope you all can help me out with things to try. The goal here is to test the module to make sure it's loading and that the IoC is working / wired up.

I have a test that is similar to their example: http://code.google.com/p/roboguice/source/browse/astroboy/src/test/java/org/roboguice/astroboy/controller/Astroboy2Test.java?name=roboguice-2.0b3&r=ba37ef680410c64f7f1fe90f5b7b482958d276b5

Mine is different in two way... My module is in a library class, which is identical by syntax:

public class MyTestModule extends AbstractModule {
        @Override
        protected void configure() {
            bind(Vibrator.class).toInstance(vibratorMock);
        }
}

I also have the roboguice.xml in the library class in the value folder

<resources> 
    <string-array name=roboguice_modules> 
        <item>com.yourdomain.MyTestModule</item> 
    </string-array> 
<resources> 

The test project references the the app project, which references and exports the library project.

In the test project it's like so:

@RunWith(RobolectricTestRunner.class)
public class MyTest {

    @Before
    public void setup() {
    // Override the default RoboGuice module
    RoboGuice.setBaseApplicationInjector(Robolectric.application, RoboGuice.DEFAULT_STAGE, Modules.override(RoboGuice.newDefaultRoboModule(Robolectric.application)).with(new MyTestModule()));
}

During the setup, it always errors with some kind of null exception. I've broken this out, and specifically with the newDefaultRoboModule method. I know that Robolectric.application is not null, and I know that new MyTestModule is not null either. Although when stepping through the debugger, I found that MyTestModule.binder is null, so I don't know if that's an issue.

the error stack trace:

java.lang.NoClassDefFoundError: javax/inject/Provider
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at javassist.Loader.findClass(Loader.java:379)
at com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.findClass(RobolectricClassLoader.java:72)
at javassist.Loader.loadClass(Loader.java:311)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.loadClass(RobolectricClassLoader.java:49)
at roboguice.RoboGuice.newDefaultRoboModule(RoboGuice.java:144)
at test.yourdomain.MyTest.setup(MyTest.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
at com.xtremelabs.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:284)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.ClassNotFoundException: javax.inject.Provider
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at javassist.Loader.delegateToParent(Loader.java:428)
at javassist.Loader.loadClassByDelegation(Loader.java:406)
at javassist.Loader.loadClass(Loader.java:308)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.loadClass(RobolectricClassLoader.java:49)
... 36 more

Where else should I look? I feel lost at how all this binds via testing.

Thanks for looking, Kelly

Answer 1

I needed to include the javax.inject.jar from the guice 3.0 zip with my roboguice 2.0 setup.

https://github.com/google/guice/wiki/Guice30

Answer 2

The Roboguice project has a robolectric test in the sample application. Check it out in the source. I am using the same approach and it works just fine for me.

I would definitely suggest to upgrade to 2.x of Roboguice soon. Latest with the release..