Remove some java files from jacoco test coverage using gradle

Question

I want to exclude some source files in Jacaco Test coverage report.For other generated code I have done like this:

classDirectories = fileTree(
            dir: "${project.buildDir}/intermediates/classes/debug/com",
            excludes: [
                    '**/R.class',
                    '**/R$*.class']
                    )  

But for excluding Java files when I am trying to do like this:

   dir: "${project.buildDir}/intermediates/classes/debug/com",
            excludes: [
                 'src//java/com/example/application/Constants.java'] 

have also tried like this: '**/application/Constants.class'.It doesn't work. Do I need to include the path here: dir: "${project.buildDir}/intermediates/classes/debug/com"?

I am using Android studio 3.0 (i don't think it matters here). Full code that I am trying:

task jacocoTestReport(type: JacocoReport) {
        group = "Reporting"
        description = "Generate Jacoco coverage reports"
        reports {
            xml.enabled = true
            html.enabled = true
        }

 sourceDirectories = files(sourceSets)

 classDirectories = fileTree(
            dir: "${project.buildDir}/intermediates/classes/debug/com",
            excludes: [
                    'src//java/com/example/application/Constants.java',     //this is not working
                    '**/R.class',
                    '**/R$*.class',
                    '**/BuildConfig.*',
                    '**/Manifest*.*',
                    '**/*$ViewInjector*.*',
                    '**/*$ViewBinder*.*',
                    '**/*$Lambda$*.*', // Jacoco can not handle several "$" in class name.
                    '**/*Module.*', // Modules for Dagger.
                    '**/*Dagger*.*', // Dagger auto-generated code.
                    '**/*MembersInjector*.*', // Dagger auto-generated code.
                    '**/*_Provide*Factory*.*',
                    '**/*_Factory.*', //Dagger auto-generated code
                    '**/*$*$*.*', // Anonymous classes generated by kotlin
                    //add libraries
                    'android/**/*.*',
                    'com/**/*.*',
                    'uk/**/*.*',
                    'io/**/*.*',
                    //remove what we don't test
                    'androidTest/**/*.*',
                    'test/**/*.*',
                    '**/injector/**/*.*',
                    '**/model/**/*.*',
                    '**/mock/**/*.*',
                    '**/event/**/*.*',
                    '**/**_ViewBinding**',
                    '**/*EventType.*',
                    '**/**Mocked'
            ]

    )
    executionData = fileTree(dir: 'build/jacoco', include: '**/*.exec')

}

Answer 1

In my project, config like this:

//exclude the folders we do not want to check
jacocoTestReport {
    afterEvaluate {
        classDirectories = files(classDirectories.files.collect {
            fileTree(dir: it, exclude: [
                    '**/enum/**',
                    '**/util/**',
            ])
        })
    }
}