Jacoco doesnt report coverage correctly - jacoco

Question

I'm trying to set up jacoco for an android project, but there are two issues with the generated report.
1- I declared the destination folder for HTML and XML report but the generated report appears in build/reports/coverage/androidTest/debug
2- the generated report is incorrect and shows that the adder class is not covered, which is wrong.
adder class
class Adder {
fun adder(a:Int,b:Int):Int{
return a+b
}
fun subtractor(a:Int,b:Int):Int{
return a-b
}
}
test class
class AdderTest {
#Test
fun `test`(){
assertEquals(3,Adder().adder(1,2))
}
#Test
fun `substract`(){
assertEquals(-1,Adder().subtractor(1,2))
}
}
jacoco script
apply plugin: 'jacoco'
project.afterEvaluate { project ->
setupAndroidReporting()
}
def setupAndroidReporting() {
tasks.withType(Test) {
// Whether or not classes without source location should be instrumented
jacoco.includeNoLocationClasses = true
jacoco.excludes = ['jdk.internal.*']
}
// Grab all build types and product flavors
def buildTypes = android.buildTypes.collect { type ->
type.name
}
def productFlavors = android.productFlavors.collect { flavor ->
flavor.name
}
// 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"
System.out.println("Task -> $testTaskName")
// Create coverage task of form 'testFlavorTypeCoverage' depending on 'testFlavorTypeUnitTest'
task "${testTaskName}Coverage1"(type: JacocoReport, dependsOn: "$testTaskName") {
group = "Reporting"
description = "Generate Jacoco coverage reports on the ${sourceName.capitalize()} build."
if (buildTypeName == 'debug') {
reports {
csv.enabled true // change if needed
xml.enabled false // change if needed
xml.setDestination(new File("${project.rootDir.path}/coverage-report"))
html {
enabled true
destination new File("${project.rootDir.path}/coverage-report")
}
}
def fileFilter = [
]
def javaTree = fileTree(dir: "${project.buildDir}/intermediates/javac/$sourceName/classes", excludes: fileFilter)
def kotlinTree = fileTree(dir: "${project.buildDir}/tmp/kotlin-classes/$sourceName", excludes: fileFilter)
classDirectories.from = files([javaTree], [kotlinTree])
executionData.from = files("${project.buildDir}/jacoco/${testTaskName}.exec")
def coverageSourceDirs = ["src/main/java",
"src/$productFlavorName/java",
"src/$buildTypeName/java"]
sourceDirectories.setFrom(files(coverageSourceDirs))
additionalSourceDirs.setFrom(files(coverageSourceDirs))
println "xml report: file://${reports.xml.destination}"
println "html report: file://${reports.html.destination}/index.html"
}
}
}
}
}
android {
buildTypes {
debug {
testCoverageEnabled true
}
}
}
report