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Editorial Team
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Asked: 2026-06-07T03:35:30+00:00

The Application object for my Android app loads a JNI library, and Robolectric doesn’t

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The Application object for my Android app loads a JNI library, and Robolectric doesn’t seem to like that. When I go to run my tests Robolectric craps out and I get this stack trace:

java.lang.UnsatisfiedLinkError: no cperryinc-jni in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1758) at
java.lang.Runtime.loadLibrary0(Runtime.java:823) at
java.lang.System.loadLibrary(System.java:1045) at
com.cperryinc.application.MoolaApplication.(MoolaApplication.java:24)
at java.lang.Class.forName0(Native Method) at
java.lang.Class.forName(Class.java:169) at
com.xtremelabs.robolectric.internal.ClassNameResolver.safeClassForName(ClassNameResolver.java:36)
at
com.xtremelabs.robolectric.internal.ClassNameResolver.resolve(ClassNameResolver.java:15)
at
com.xtremelabs.robolectric.ApplicationResolver.newApplicationInstance(ApplicationResolver.java:71)
at
com.xtremelabs.robolectric.ApplicationResolver.resolveApplication(ApplicationResolver.java:28)
at
com.xtremelabs.robolectric.RobolectricTestRunner.createApplication(RobolectricTestRunner.java:483)
at
com.xtremelabs.robolectric.RobolectricTestRunner.setupApplicationState(RobolectricTestRunner.java:360)
at
com.xtremelabs.robolectric.RobolectricTestRunner.internalBeforeTest(RobolectricTestRunner.java:299)
at
com.xtremelabs.robolectric.RobolectricTestRunner.methodBlock(RobolectricTestRunner.java:277)
at
org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at
org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at
org.junit.runners.ParentRunner.run(ParentRunner.java:236) at
org.junit.runner.JUnitCore.run(JUnitCore.java:157) at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:76)
at
com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:182)
at
com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

I’m not exactly sure what I can do about this. Any ideas on a workaround?

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1 Answer

  1. Editorial Team

    Solution works for Robolectric 1.2, not 2.+

    Thanks to Jan Berkel for answering this here:
    https://groups.google.com/d/msg/robolectric/beW9XjT8E1A/pJQrRaybN30J

    class MyJniClass {
 static {
        try {
            System.loadLibrary("libname");
        } catch (UnsatisfiedLinkError e) {
            // only ignore exception in non-android env
            if ("Dalvik".equals(System.getProperty("java.vm.name"))) throw e;
        }
    }
}

    then in the testrunner:

    public class MyTestRunner  extends RobolectricTestRunner {
   public MyTestRunner(Class testClass) throws InitializationError {
         // remove native calls + replace with shadows
        addClassOrPackageToInstrument("com.example.jni.MyJniClass");
   }

   protected void bindShadowClasses() {
         // bind shadow JNI classes
   }
}
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