succeeds("build")
        executedAndNotSkipped ":compileJava", ":build"

        when:
        jarWithClasses(somelib, Thing: 'class Thing { public void foo () {} }')

        then:
        buildTriggeredAndSucceeded()
        executedAndNotSkipped ":compileJava"

        when:
        jarWithClasses(somelib, Thing: 'class Thing { public void bar() {} }')

        then:
        buildTriggeredAndSucceeded()

    def "reuses cached ClassLoaders"() {

        given: 'a Task that holds some static data'
        File staticDataLib = file("lib/StaticData.jar").tap {
            parentFile.mkdirs()
        }
        jarWithClasses(
            staticDataLib,
            StaticData: """
                import org.gradle.api.*;
                import org.gradle.api.tasks.*;
                import java.util.concurrent.atomic.AtomicInteger;

    }

    @Issue("https://issues.gradle.org/browse/GRADLE-3508")
    def "detects change in classpath order"() {
        jarWithClasses(file("lib1.jar"), Thing: "class Thing {public void foo() {} }")
        jarWithClasses(file("lib2.jar"), Thing: "class Thing { public void bar() {} }")
        file("src/main/java/Foo.java") << "public class Foo extends Thing {}"

            }
        }
    }

    AbstractIntegrationSpec withMaxHttpRetryCount(int count) {
        maxHttpRetries = count
        this
    }

    def jarWithClasses(Map<String, String> javaSourceFiles, TestFile jarFile) {
        def builder = artifactBuilder()
        for (Map.Entry<String, String> entry : javaSourceFiles.entrySet()) {