Gradle Jacoco and JUnit5

Question

We just ported our unit tests to JUnit5. Realizing that this is still rather early adoption with little hints on google.

The most challenging was to get jacoco code cove

Answer 1

Thank you, so the hack now looks like this:

project.afterEvaluate {
    def junitPlatformTestTask = project.tasks.getByName('junitPlatformTest')

    // configure jacoco to analyze the junitPlatformTest task
    jacoco {
        // this tool version is compatible with
        toolVersion = "0.7.6.201602180812"
        applyTo junitPlatformTestTask
    }

    // create junit platform jacoco task
    project.task(type: JacocoReport, "junitPlatformJacocoReport",
            {
                sourceDirectories = files("./src/main")
                classDirectories = files("$buildDir/classes/main")
                executionData junitPlatformTestTask
            })
}

Answer 2

To get a reference to the junitPlatformTest task, another option is to implement an afterEvaluate block in the project like this:

afterEvaluate {
  def junitPlatformTestTask = tasks.getByName('junitPlatformTest')

  // do something with the junitPlatformTestTask
}

See my comments on GitHub for JUnit 5 for further examples.

Answer 3

You just need to add @RunWith(JUnitPlatform.class) to your package

@RunWith(JUnitPlatform.class)
public class ClassTest {
}

Answer 4

Can be also resolved with direct agent injection:

subprojects {
   apply plugin: 'jacoco'

   jacoco {
        toolVersion = "0.7.9"
   }

   configurations {
        testAgent {
            transitive = false
        }
   }

   dependencies {
        testAgent("org.jacoco:org.jacoco.agent:0.7.9:runtime")
   }

   tasks.withType(JavaExec) {
        if (it.name == 'junitPlatformTest') {
            doFirst {
                jvmArgs "-javaagent:${configurations.testAgent.singleFile}=destfile=${project.buildDir.name}/jacoco/test.exec"
            }
        }
    }
}

then report will be available with jacocoTestReport task