Duplicate class found in modules modules maven-ant-tasks-2.1.3.jar (org.apache.maven:maven-ant-tasks:2.1.3) and maven-artifact-2.2.1.jar (org.apache.maven:maven-artifact:2.2.1)

[efinder2]

Description

I tried to add start testing my app with robolectric. But on the first build I got a duplicated class error (see log.txt)

dependency_tree.txt

Steps to Reproduce

Create a new Project in Android studio, add robolectric 4.3 to the dependencies (or use the Code from the repo) and try to Start ExampleInstrumentation Test.

build.gradle.txt

Robolectric & Android Version

Tried to test on an Android 8.1 and use Robolectric 4.3

Link to a public git repo demonstrating the problem:

https://github.com/efinder2/RobolectricSample

P.S.
see this StackOverflow post

[Prafulla-Nair]

I've the same issue

[fejd]

I suddenly ran into this issue in an existing app with working tests. No changes in the build files or tests, the tests started failing suddenly.
My only guess is that the artifact in the Gradle cache was synced and updated. I'm using Robolectric 4.2 though.

[kacso]

I'm experiencing same issue when running gradle assembleAndroidTest task (executed by jitpack CI), but when gradle build or gradle install (to install library locally) is performed, everything works fine.

Any info on how to resolve this?

[efinder2]

Finally solved it by removing the duplicated libraries manually: https://stackoverflow.com/a/57819278/4140943
Could this be added in the library? The library with the problem (org.apache.maven:maven-ant-tasks:2.1.3) is no longer maintained.

[Pozzoooo]

+1, facing the issue using Robolectric 4.0.2

[ibcoleman]

Same issue on 4.3.1

[mochadwi]

you are a lifesaver @efinder2 excluding the dependency works for me for 4.3.1. But I'm curious why you reopened this issue?

0. Attempt zero (Conflicted transitive dependency)

// Conflicted transitive dependency for androidx.test:monitor
- org.robolectric:robolectric -> androidx.test:monitor:1.2.0 (forced to use 1.1.0)
- androidx.test:core -> androidx.test:monitor:1.1.0
- androidx.test:runner -> androidx.test:monitor:1.1.0

// Conflicted transitive dependency for com.google.guava:listenablefuture
- androidx.test.ext:truth -> androidx.test:monitor:9999.0 (forced to use 1.0)
- androidx.work:work-runtime -> androidx.test:monitor:1.0

I just forced it to exclude the conflicted version, See here for detail. My problems:

1. Attempt one (Ignore/excluding the maven-task related)
   Seems to work, but show NoClassDefError

2. Attempt two (Using sharedTest and roboelectric:annotations)
   does from qiita.com website solve your issue @ibcoleman @Pozzoooo @efinder2

https://qiita.com/sekitaka_1214/items/5569925db2d5f27ba712 (originally from japanesse)

thanks @sekitaka for providing the answer

// wrong 
androidTestImplementation  "org.robolectric: robolectric: $ robolectricVersion"

// Positive 
androidTestImplementation  "org.robolectric: annotations: $ robolectricVersion"

3. Attempt three (Check for conflicting/unnecessary dependencies)
   See here for details. This has happened when we configured for both testImplementation & androidTestImplementation, we don't need the unitTest one, so removed the roboelectric and keep for instrumentation test instead.

4. Attempt four (Duplicate class for org.codehaus.classworld)
   When seeing the ./gradlew dependencies, roboelectric depends on the classworld libs, but I don't know which library that conflicted with roboelectric transitive dependency version. Same problem hapened here

[hoisie]

maven-ant-tasks is no longer a dependency for Robolectric 4.4