dexcache == null error

[sek]

This issue from the old google code project: https://code.google.com/p/dexmaker/issues/detail?id=2 is still valid as of the released 1.2 version

Java.lang.IllegalArgumentException: dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system property)
at com.google.dexmaker.DexMaker.generateAndLoad(DexMaker.java:359)
at com.google.dexmaker.stock.ProxyBuilder.buildProxyClass(ProxyBuilder.java:252)
at com.google.dexmaker.mockito.DexmakerMockMaker.createMock(DexmakerMockMaker.java:51)
at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:41)
...

However, I verified that it has been fixed in the current github repository (last commit March 12th 2015 - ca74669):

• git clone https://github.com/crittercism/dexmaker.git
• cd dexmaker
• mvn install -Dmaven.test.skip=true
• cp -R ~/.m2/repository/com/google/dexmaker $ANDROID_HOME/extras/android/m2repository/com/google
• and then update project dependency to 1.3-SNAPSHOT

It would be nice to have a 1.3 release so that we can take the workaround lines out of the test setUp() methods:
System.setProperty("dexmaker.dexcache", getContext().getCacheDir().getPath());

Thanks!

[agampe]

Are you sure? I can't see any changes in the code path that would suggest it should not fail anymore.

I've added a pull request that updates the AppDataDirGuesser. It was out-of-date for any Android version 4.3+. With that it should be fine.

[ened]

@sek please try 1.4.

[sek]

I'm getting new errors in 1.3 and 1.4 =/

I pushed a simple demo project to github for reference: https://github.com/sek/MockitoOnAndroidDemo

To clone and run tests:

git clone https://github.com/sek/MockitoOnAndroidDemo
cd MockitoOnAndroidDemo
./gradlew connectedAndroidTest --stacktrace

It should also open smoothly in Android Studio 1.3 for editing.
The version of dexmaker can be modified on line 27 of app/build.grade

With dexmakerVersion == 1.2

All tests pass. Note that if this problem is fixed, DexmakerIssue12Test.testMockAndroidObject() should fail with "expected an Exception" message.

With dexmakerVersion == 1.3

com.stankurdziel.mockitodemo.DexmakerIssue12Test > testMockAndroidObject[Nexus_5_API_21_x86(AVD) - 5.0.1] FAILED
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/dexmaker/dx/rop/type/Type;
at com.google.dexmaker.TypeId.(TypeId.java:36)

com.stankurdziel.mockitodemo.DexmakerIssue12Test > testMockAndroidObjectWorkAround[Nexus_5_API_21_x86(AVD) - 5.0.1] FAILED
java.lang.NoClassDefFoundError: com.google.dexmaker.stock.ProxyBuilder
at com.google.dexmaker.mockito.DexmakerMockMaker.createMock(DexmakerMockMaker.java:55)
...

With dexmakerVersion == 1.4

com.stankurdziel.mockitodemo.DexmakerIssue12Test > testMockAndroidObject[Nexus_5_API_21_x86(AVD) - 5.0.1] FAILED
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/android/dx/rop/type/Type;
at com.android.dx.TypeId.(TypeId.java:36)

com.stankurdziel.mockitodemo.DexmakerIssue12Test > testMockAndroidObjectWorkAround[Nexus_5_API_21_x86(AVD) - 5.0.1] FAILED
java.lang.NoClassDefFoundError: com.android.dx.stock.ProxyBuilder
at com.android.dx.mockito.DexmakerMockMaker.createMock(DexmakerMockMaker.java:56)
...

[ened]

Will look into it tonight.

[mjohenneken]

Are there updates on this issue? We simply don't get mockito working on Android Devices (API21). We're trying to mock Classes. We tried it with 1.4, no Chance..

[sek]

Hi @mjohenneken ,
I'm still successfully using 1.2 with the workaround demonstrated here: https://github.com/sek/MockitoOnAndroidDemo/blob/master/app/src/androidTest/java/com/stankurdziel/mockitodemo/NormalUsageOfMockito.java

I think we are on API22 now, but pretty sure it worked fine on API21 also - just an inconvenience to have to have that line in your setUp() for every test mocking android classes.

-Stan

[vaughandroid]

@sek Could you try the build referenced in my pull request? #21

[mjohenneken]

I figured out that those dependencies make me able to write tests with Mockito, JUnit4 and Espresso on the Android Device. I had to add dexmaker-dx as dependency.

compile 'com.android.support:support-annotations:22.2.0'

androidTestCompile 'com.android.support.test:runner:0.3'

androidTestCompile 'com.android.support.test:rules:0.3'

androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2'

androidTestCompile 'org.mockito:mockito-core:1.10.19'

androidTestCompile 'com.crittercism.dexmaker:dexmaker:1.4'

androidTestCompile 'com.crittercism.dexmaker:dexmaker-dx:1.4'

androidTestCompile 'com.crittercism.dexmaker:dexmaker-mockito:1.4'

[vaughandroid]

@mjohenneken Thanks! Adding the dexmaker-dx dependency worked for me. 👍

[MatFl]

This is still a issue when trying to run local (non-android) tests in an android library module. It is working for application modules.

In the local tests the DexmakerMockMaker should not be used at all.

My current workaround is to provide a custom Mockito PluginSwitch which causes Mockito to use the default MockMaker.

[AnthonyUccello]

Hey guys I found a workaround for this that works:

https://comadeblog.wordpress.com/2013/11/12/dexcachenull-for-mockito-on-robolectric/comment-page-1/

Basically use 1.9 version of Mockito:

compile 'org.mockito:mockito-core:1.9.0'

[RyanNewsom]

@AnthonyUccello that worked for me. Can you guys fix this please however so we can use the latest 2.0 version?

[wongkwokfai]

@MatFl or anyone,
Could you exactly describe your implementation of Mockito PluginSwitch?

Many thanks!

[MatFl]

Newer versions of mockito (I think since mockito 2.6) support android out of the box. You can remove all the dexmaker dependencies and add the mockito-android instead. Check out the android-boilerplate project for an example: https://github.com/ribot/android-boilerplate/blob/master/app/build.gradle

[wongkwokfai]

@MatFi
Thanks for your quick reply.
FYI I manage to disable Dexmaker using PluginSwitch and mockito version 1.10.19