Can't run Scalatest with Gradle

Question

task scalaTest(dependsOn: testClasses) << {
    description = \'Runs Scalatest suite\'
    ant.taskdef(name: \'scalatest\',
            classname: \'org.scalatest.         


        

Answer 1

As of Gradle 3.2.1, following root build.gradle runs both JUnit and ScalaTest code. This code is for multi-project build, enabled via settings.gradle, that's why subprojects used.
Plus, it's on purpose uses explicit Gradle API, to minimize Gradle DSL magic.

description = 'root project'

def enableScalaTest(Project project) {
    Task scalaTest = project.task(
            [
                    'dependsOn': 'testClasses',
                    'description': 'Runs ScalaTest tests in the project'
            ],
            'scalaTest',
            {
                ext.inputDir = project.tasks.getByName('compileTestScala').destinationDir
                inputs.dir(ext.inputDir)
            }
    )

    scalaTest.doLast({
        ant.taskdef(name: 'scalatest',
                classname: 'org.scalatest.tools.ScalaTestAntTask',
                classpath: project.sourceSets.test.runtimeClasspath.asPath)
        ant.scalatest(runpath: ext.inputDir,
                fork: 'false',
                haltonfailure: 'true')
                { reporter(type: 'stdout') }
    })

    project.getTasks().getByName('build').dependsOn(scalaTest)
}

subprojects {
    apply plugin: 'scala'

    repositories {
        mavenCentral()
    }

    dependencies {
        compile 'org.scala-lang:scala-library:2.12.1'

        testCompile 'junit:junit:4.12'
        testCompile 'org.scalatest:scalatest_2.12:3.0.1'
    }

    enableScalaTest(delegate)
}