Robolectric NoClassDefFoundError with org.apache packages

We are trying to integrate robolectric in our project but have runned into some unexpected problems.

The project compiles fine when we're not using Robolectric. However, we are getting NoClassDefFoundError in the org.apache.http packages when running simple tests with Robolectric.

Exception in thread "Thread-1" java.lang.NoClassDefFoundError: org/ 
apache/http/HttpRequest 
开发者_JAVA百科        at java.lang.ClassLoader.defineClass1(Native Method) 
        at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632) 
        at java.lang.ClassLoader.defineClass(ClassLoader.java:616) 
        at java.lang.ClassLoader.defineClass(ClassLoader.java:466) 
        at javassist.Loader.findClass(Loader.java:379) 
        at 
com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.findClass(Robole ctricClassLoader.java: 
60) 
        at javassist.Loader.loadClass(Loader.java:311) 
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
        at 
com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.loadClass(Robole ctricClassLoader.java: 
37) 
        at se.hsr.android.Info.updateInfoFromWebService(Info.java:57) 
        at se.hsr.android.Info$2.run(Info.java:99) 
Caused by: java.lang.ClassNotFoundException: caught an exception while 
obtaining a class file for org.apache.http.HttpRequest 
        at javassist.Loader.findClass(Loader.java:359) 
        at 
com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.findClass(Robole ctricClassLoader.java: 
60) 
        at javassist.Loader.loadClass(Loader.java:311) 
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
        at 
com.xtremelabs.robolectric.bytecode.RobolectricClassLoader.loadClass(Robole ctricClassLoader.java: 
37) 
        ... 11 more 
Caused by: java.lang.IllegalStateException: shouldn't be modifying 
bytecode after we've started writing cache! 
class=org.apache.http.HttpRequest 
        at 
com.xtremelabs.robolectric.bytecode.AndroidTranslator.onLoad(AndroidTransla tor.java: 
68) 
        at javassist.Loader.findClass(Loader.java:340) 
        ... 15 more 

We are using maven to build our project and we have included http-client 4.1 (because we are dependent on http-mime 4.1 from the apache library).

Since the Robolectric jar as default includes httpclient 4.0.3 we can't understand why it can't find the http classes. We assume it has something to do with AndroidTranslator trying to modify bytecode (to be compatible with the dalvik jvm?)

If someone could shed some light on this matter we would be very grateful.

I had the same problem I fixed it by added the following exclusion

    <dependency>
        <groupId>com.pivotallabs</groupId>
        <artifactId>robolectric</artifactId>
        <version>1.0-RC1</version>
        <exclusions>
            <exclusion>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
            </exclusion>
        </exclusions>
        <scope>test</scope>
    </dependency>