[android-developers] Issue with compiling Unit tests that use Mockito

Hi All,

I have JUnit tests for my Android project that use Mockito.  For compiling I needed to add the junit and mockito jars to my libs folder.  I am using android tools 20 and trying to compile using Ant.  I get following error while converting to dex
------------------------------------------------------------
       [dx]
       [dx] UNEXPECTED TOP-LEVEL EXCEPTION:
       [dx] java.lang.IllegalArgumentException: already added: Lorg/hamcrest/BaseDescription;
       [dx]     at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
       [dx]     at com.android.dx.dex.file.DexFile.add(DexFile.java:163)
       [dx]     at com.android.dx.command.dexer.Main.processClass(Main.java:486)
       [dx]     at com.android.dx.command.dexer.Main.processFileBytes(Main.java:455)
       [dx]     at com.android.dx.command.dexer.Main.access$400(Main.java:67)
       [dx]     at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:394)
       [dx]     at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
       [dx]     at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:131)
       [dx]     at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
       [dx]     at com.android.dx.command.dexer.Main.processOne(Main.java:418)
       [dx]     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:329)
       [dx]     at com.android.dx.command.dexer.Main.run(Main.java:206)
       [dx]     at com.android.dx.command.dexer.Main.main(Main.java:174)
       [dx]     at com.android.dx.command.Main.main(Main.java:91)
       [dx] 1 error; aborting
------------------------------------------------------------

The issue is because I am including 2 jars which have same class inside. http://www.jarfinder.com/index.php/java/info/org.hamcrest.BaseDescription
I thought that "already added" error was taken care of with the tools 17 release.  Is the issue still there in tools 20?

Do I need to do something different to resolve this issue?

Regards,
Yadnesh

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