Configure Jacoco with gradle and kotlin DSL

Question

I'm trying to configure Jacoco to exclude some classes from analysis but can't find any working example :(

I found some samples with afterEvaluate but no success

Please add an example on what you tried or your current `build.gradle` file and add details what exactly does not work as you expect. — Lukas Körfer, May 09 '19 at 10:05
All that i've tried, don't even compile. So i've no relevant example to provide — yodamad, May 09 '19 at 10:11

score 9 · Accepted Answer · edited Jul 13 '22 at 13:24

src/main/java/org/example/A.java:

package org.example;

class A {
}

src/main/java/org/example/B.java:

package org.example;

class B {
}

src/test/java/org/example/ExampleTest.java:

package org.example;

public class ExampleTest {
  @org.junit.Test
  public void test() {
    new A();
    new B();
  }
}

build.gradle.kts:

plugins {
  java
  jacoco
}

repositories {
  mavenCentral()
}

dependencies {
  testCompile("junit:junit:4.12")
}

using Gradle 5.4.1 execution of gradle test jacocoTestReport produces following report

after addition to build.gradle.kts

tasks.withType<JacocoReport> {
  classDirectories.setFrom(
    sourceSets.main.get().output.asFileTree.matching {
      exclude("org/example/B.class")
    }
  )
}

execution of the same command produces following report

score 6 · Answer 2 · edited Jul 13 '22 at 08:18

Just to add to @Godin's awesome answer:

The way @Godin explained it, you would have to run gradle test jacocoTestReport which isn't bad but If you want jacoco to run when you run just with gradle test add this to your build.gralde.kts:

tasks.test {
    finalizedBy("jacocoTestReport")
    doLast {
        println("View code coverage at:")
        println("file://$buildDir/reports/jacoco/test/html/index.html")
    }
}

score 3 · Answer 3 · answered Sep 30 '21 at 07:33

I've managed to exclude this way:

tasks.jacocoTestReport {
    classDirectories.setFrom(
        files(classDirectories.files.map {
            fileTree(it) {
                exclude(
                    "com/example/integration/**",
                    "com/example/application/*Ext*"
                )
            }
        })
    )
}

Taken from here

Configure Jacoco with gradle and kotlin DSL

3 Answers3