Gradle integration tests folder (no auto execution)

build.gradle

configurations {
    integrationTestImplementation.extendsFrom testImplementation
    integrationTestCompile.extendsFrom testCompile
    integrationTestRuntime.extendsFrom testRuntime
}

sourceSets {
    integrationTest {
        java {
            compileClasspath += main.output + test.output
            runtimeClasspath += main.output + test.output
            srcDir file('src/integration/java')
        }
        resources.srcDir file('src/integration/resources')
    }
}

task integrationTest(type: Test) {
    classpath = sourceSets.integrationTest.runtimeClasspath
}