scoverage plugin not working for project iwht mix of java and scala code

[paramr]

When scala code references java code and scoverage is used with gradle, I get compilation errors in scala where the java classes are referenced.

this is because in ScoveragePlugin.groovy, we dont copy over java files from the sourceset when creating instrumentedSourceSet (Might be better to copy whole sourceset if possible:

        def instrumentedSourceSet = project.sourceSets.create('scoverage') {

            resources.source(originalSourceSet.resources)
            scala.source(originalSourceSet.scala)

            compileClasspath += originalSourceSet.compileClasspath + project.configurations.scoverage
            runtimeClasspath = it.output + project.configurations.scoverage + originalSourceSet.runtimeClasspath
        }

workaround for now is to add following to build.gradle:

allprojects {
    afterEvaluate { project ->
        def originalSourceSet = project.sourceSets.getByName(
            SourceSet.MAIN_SOURCE_SET_NAME)
        def scoverageSourceSet = project.sourceSets.getByName('scoverage')
        scoverageSourceSet.java.source(originalSourceSet.java)
    }
}

[olisikh]

Thank you @maiflai for merging the PR.
@paramr this should be fixed in 3.1.3, could you check it out and close this issue if all ok?

[paramr]

Thanks for fixing this, one small caveate is that default dependencies in gradle goes like scala -> java -> kotlin (if code exists). So we might need to consider kotlin at some point too.

Testing this. Will update soon.

[paramr]

test is working fine. However we do also have integration tests which is defined as:

task scalaIntegrationTest(dependsOn: ['integrationTestClasses'], type: Test) {
    testClassesDirs = sourceSets.integrationTest.output.classesDirs
    classpath = sourceSets.integrationTest.runtimeClasspath
    mustRunAfter test
    reports {
        junitXml.enabled = true
        html.enabled = true
    }
}

and this fails with:

* What went wrong:
Execution failed for task ':reportScalaIntegrationTestScoverage'.
> No signature of method: static scala.collection.JavaConverters.asScalaBuffer() is applicable for argument types: (ArrayList) values: [[<redacted>/build/scoverage/scoverage.measurements.56, ...]]

[bufistov]

I had a similar issue that get solved after removing scala-style plugin dependency from the project. This plugin only works with Scala 2.11 and it seems that latest Scoverage plugin only works with Scala 2.12

[maiflai]

I'm looking at the 2.11 issue under #94

Sorry,
Stu

[AceHack]

I'm having a very similar if not the same issue.

scoverage/scalac-scoverage-plugin#264

[eyalroth]

This shouldn't be a problem for a mixed java/scala project, as these projects should be configured in such a way where the java source set is empty and the scala source set contains both Java and Scala code; otherwise, the Java code cannot access Scala code.

Take a look at my mixed Java / Scala multi-module gradle example project (I'm planning to write a guide for it, as it is not all that self-explanatory), and especially note how the source sets are configured in the gradle/scala.gradle file:

apply plugin: 'scala'

// A way to make Java code able to import Scala code (doesn't work by default)
ext.configureSources = { set, name ->
    set.scala.srcDir("src/$name/java")
    set.java.srcDirs = []
}
configureSources(sourceSets.main, 'main')
configureSources(sourceSets.test, 'test')