when(artifact.getGroupId()).thenReturn("group1");
        when(artifact.getArtifactId()).thenReturn("artifact1");
        when(artifact.getExtension()).thenReturn("ext");
        when(artifact.getClassifier()).thenReturn("classifier1");
        when(artifact.getVersion()).thenReturn("1");
        artifacts.add(artifact);

    @Override
    public String getClassifier() {
        return classifier;
    }

    @Override
    public String getDirectory() {
        return null;
    }

    @Override
    public String getExtension() {
        return extension;
    }

    @Override
    public String getLanguage() {
        return "none";
    }

    @Override
    public String getPackaging() {
        return packaging;

            return null;
        }

        @Override
        public String getDirectory() {
            return null;
        }

        @Override
        public String getExtension() {
            return "jar";
        }

        @Override
        public String getLanguage() {
            return "none";
        }

        @Override
        public String getPackaging() {

            oldExtension.setClassLoadingStrategy(extension.getClassLoadingStrategy());
        }
        this.extension = oldExtension;
    }

    public CoreExtension getExtension() {
        return extension;
    }

                type = new DefaultType(
                        id,
                        languageRegistry.lookup(handler.getLanguage()).orElseGet(() -> handler::getLanguage),
                        handler.getExtension(),
                        handler.getClassifier(),
                        handler.isIncludesDependencies(),
                        handler.isAddedToClasspath()

    }

    public String getType() {
        return type;
    }

    @Override
    public String getExtension() {
        if (extension == null) {
            return type;
        }
        return extension;
    }

    public void setExtension(final String extension) {
        this.extension = extension;
    }

    @Override
    public String getClassifier() {

            ArtifactRepository deploymentRepository,
            ArtifactRepository localRepository)
            throws ArtifactDeploymentException {
        String extension = artifact.getArtifactHandler().getExtension();
        File source = new File(basedir, finalName + "." + extension);
        deploy(source, artifact, deploymentRepository, localRepository);
    }

    @Override
    public void deploy(

    }

    @Override
    public String getId() {
        return id();
    }

    @Override
    public Language getLanguage() {
        return language;
    }

    @Override
    public String getExtension() {
        return extension;
    }

    @Override
    public String getClassifier() {
        return classifier;
    }

    @Override
    public boolean isIncludesDependencies() {

        return allHandlers.computeIfAbsent(id, k -> {
            Type type = typeRegistry.require(id);
            return new DefaultArtifactHandler(
                    id,
                    type.getExtension(),
                    type.getClassifier(),
                    null,
                    null,
                    type.isIncludesDependencies(),
                    type.getLanguage().id(),

                session,
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getVersion().toString(),
                artifact.getClassifier(),
                artifact.getExtension(),
                null));
    }