classpath.implementationClasspath.size() == NUM_INTERNAL_JARS + NUM_EXTERNAL_JARS + 2
        classpath.implementationClasspath.findAll { it.toString().endsWith("-internal.jar") }.size() == NUM_INTERNAL_JARS
        classpath.implementationClasspath.findAll { it.toString().endsWith("-external.jar") }.size() == NUM_EXTERNAL_JARS + 2

        expect:
        def module = registry.getModule("gradle-some-module")
        module.implementationClasspath.asFiles == [classesDir, resourcesDir, staticResourcesDir]
        module.runtimeClasspath.asFiles == [externalRuntimeDep]

        def dep = registry.getExternalModule("dep")
        dep.implementationClasspath.asFiles == [externalRuntimeDep]
    }

            this.applicationModulepath = applicationModulepath;
            this.implementationClasspath = implementationClasspath;
            this.implementationModulepath = implementationModulepath;
        }

        public boolean isEmpty() {
            return applicationClasspath.isEmpty() && applicationModulepath.isEmpty() &&
                implementationClasspath.isEmpty() && implementationModulepath.isEmpty();
        }
    }

        if (jarFile != null) {
            Set<File> implementationClasspath = new LinkedHashSet<>();
            implementationClasspath.add(jarFile);
            Properties properties = loadModuleProperties(moduleName, jarFile);
            return module(moduleName, properties, implementationClasspath);
        }

        String resourceName = getClasspathManifestName(moduleName);

            if (runAsModule || implementationModulePath == null) {
                outstr.writeInt(implementationClassPath.size());
                for (URL entry : implementationClassPath) {
                    outstr.writeUTF(entry.toString());
                }

        this.logLevel = logLevel;
        return this;
    }

    @Override
    public void setImplementationClasspath(List<URL> implementationClassPath) {
        this.implementationClassPath = implementationClassPath;
    }

    @Override
    public void setImplementationModulePath(List<URL> implementationModulePath) {
        this.implementationModulePath = implementationModulePath;

        }

        // Read worker implementation classpath
        int classPathLength = instr.readInt();
        URL[] implementationClassPath = new URL[classPathLength];
        for (int i = 0; i < classPathLength; i++) {
            String url = instr.readUTF();
            implementationClassPath[i] = new URL(url);
        }

        ClassLoader implementationClassLoader;
        if (classPathLength > 0) {

        this.workerProcessBuilder = workerProcessBuilder;
        ClassPath implementationClasspath = ClasspathUtil.getClasspath(workerImplementation.getClassLoader());
        this.outputEventListener = outputEventListener;
        workerProcessBuilder.worker(new WorkerAction(workerImplementation));
        workerProcessBuilder.setImplementationClasspath(implementationClasspath.getAsURLs());
    }

    @Override

    }

    def module(String name, Module... requiredModules) {
        Module module = Mock()
        _ * module.classpath >> DefaultClassPath.of(new File("$name-runtime"))
        _ * module.implementationClasspath >> DefaultClassPath.of(new File("$name-runtime"))
        _ * module.allRequiredModules >> (([module] + (requiredModules as List)) as LinkedHashSet)