JaCoCo doesn't work with Robolectric tests

Question

I wanted to generate code coverage reports on my JUnit tests in my android project so I added the JaCoCo gradle plugin. This is my project level build.gradle fi

Answer 1

I had the same issue. I changed the jacoco plugin version and added includenolocationclasses property. Here is the working jacoco.gradle file (I am using gradle wrapper 2.14.1):

apply plugin: 'jacoco'

jacoco {
    toolVersion = "0.7.6.201602180812"
}

android {
    testOptions {
        unitTests.all {
            jacoco {
                includeNoLocationClasses = true
            }
        }
    }
}

project.afterEvaluate {
    // Grab all build types and product flavors
    def buildTypes = android.buildTypes.collect { type -> type.name }
    def productFlavors = android.productFlavors.collect { flavor -> flavor.name }
    println(buildTypes)
    println(productFlavors)
    // When no product flavors defined, use empty
    if (!productFlavors) productFlavors.add('')

    productFlavors.each { productFlavorName ->
        buildTypes.each { buildTypeName ->
            def sourceName, sourcePath
            if (!productFlavorName) {
                sourceName = sourcePath = "${buildTypeName}"
            } else {
                sourceName = "${productFlavorName}${buildTypeName.capitalize()}"
                sourcePath = "${productFlavorName}/${buildTypeName}"
            }
            def testTaskName = "test${sourceName.capitalize()}UnitTest"
            println("SourceName:${sourceName}")
            println("SourcePath:${sourcePath}")
            println("testTaskName:${testTaskName}")
            // Create coverage task of form 'testFlavorTypeCoverage' depending on 'testFlavorTypeUnitTest'
            task "${testTaskName}Coverage" (type:JacocoReport, dependsOn: "$testTaskName") {
                group = "Reporting"
                description = "Generate Jacoco coverage reports on the ${sourceName.capitalize()} build."

                classDirectories = fileTree(
                        dir: "${project.buildDir}/intermediates/classes/${sourcePath}",
                        excludes: ['**/R.class',
                                   '**/R$*.class',
                                   '**/*$ViewInjector*.*',
                                   '**/*$ViewBinder*.*',
                                   '**/BuildConfig.*',
                                   '**/Manifest*.*']
                )

                def coverageSourceDirs = [
                        "src/main/java",
                        "src/$productFlavorName/java",
                        "src/$buildTypeName/java"
                ]
                additionalSourceDirs = files(coverageSourceDirs)
                sourceDirectories = files(coverageSourceDirs)
                executionData = files("${project.buildDir}/jacoco/${testTaskName}.exec")
                println("${project.buildDir}/jacoco/${testTaskName}.exec")
                reports {
                    xml.enabled = true
                    html.enabled = true
                }
            }
        }
    }
}