Android Unit Test of Kotlin class fails with "cannot find symbol class ..."

Issue

I've recently added the Kotlin plugin to my Android application's build and now I want to test a Kotlin class in an InstrumentationTestCase.

IntelliJ/Android Studio sees the class in the editor and it seems the class is compiled when launching the app but when I launch gradlew assembleTest it fails with "cannot find symbol [name of class]".

In my build.gradle I added the kotlin folder as srcDir

sourceSets {
    main {
        manifest.srcFile 'src/main/AndroidManifest.xml'
        java.srcDirs += 'src/main/kotlin'
    }
}

Any advice?

Edit: The issue was a conflict between the Kotlin and Retrolambda plugin and is now resolved.

Solution

I'm from Project Kotlin. Could you answer a few questions to help me reproduce your problem? Do you run gradlew assembleTest from IDE or from commandline? Do you have kotlin-stdlib in dependencies?

dependencies {
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}

Could you provide us your project? I've created an issue in your tracker, so it'll be great to see your answers here http://youtrack.jetbrains.com/issue/KT-6015

Answered By - Natalia Selezneva