Separating Different Types of Tests in Gradle

build.gradle

sourceSets {  
    apiTest {
        compileClasspath += main.output + test.output
        runtimeClasspath += main.output + test.output
    }
}

configurations {  
    apiTestCompile.extendsFrom testCompile
    apiTestRuntime.extendsFrom testRuntime
}

task apiTest(type: Test) {  
    testClassesDir = sourceSets.apiTest.output.classesDir
    classpath = sourceSets.apiTest.runtimeClasspath
}