class ExtensionsStorageTest extends Specification {
    def storage = new ExtensionsStorage()
    def listExtension = Mock(List)
    def setExtension = Mock(Set)

    def "setup"() {
        storage.add(typeOf(List), "list", listExtension)
        storage.add(typeOf(Set), "set", setExtension)
    }

    def "has extension"() {
        expect:
        storage.hasExtension("list")
        !storage.hasExtension("not")
    }

            abstract class MakeGreen implements TransformAction<Parameters> {
                interface Parameters extends TransformParameters {
                    @Input
                    String getExtension()
                    void setExtension(String value)
                }

                @InputArtifact
                abstract Provider<FileSystemLocation> getInput()

                void transform(TransformOutputs outputs) {

    private String extension, directory, classifier, packaging, language;
    private boolean includesDependencies, addedToClasspath;

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

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

    public void setDirectory(String directory) {
        this.directory = directory;
    }

    @Override

        });
    }

    @Override
    public abstract File getFile();

    @Override
    public final String getExtension() {
        return extension != null ? extension : getDefaultExtension();
    }

    protected abstract String getDefaultExtension();

    @Override
    public final void setExtension(String extension) {
        this.extension = Strings.nullToEmpty(extension);
    }

    @Override

    }

    @Override
    public String getName() {
        return GUtil.getOrDefault(name, publishArtifact::getName);
    }

    @Override
    public String getExtension() {
        return GUtil.getOrDefault(extension, publishArtifact::getExtension);
    }

    @Override
    public String getType() {
        return GUtil.getOrDefault(type, publishArtifact::getType);
    }

    @Override

     * For an artifact without an extension, this value will be an empty String.
     */
    String getExtension();

    /**
     * Sets the extension used to publish the artifact file.
     * @param extension The extension.
     */
    void setExtension(String extension);

    /**
     * The classifier used to publish the artifact file.

     */
    void setName(String name);

    /**
     * Sets the extension of this artifact.
     *
     * @param extension The extension. Should not be null.
     */
    void setExtension(String extension);

    /**
     * Sets the type of this artifact.
     *
     * @param type The type. Should not be null.
     */
    void setType(String type);

    /**

    }

    @Override
    public void setConf(@Nullable String conf) {
        throw new IllegalStateException();
    }

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

    @Override
    public void setExtension(String extension) {
        throw new IllegalStateException();
    }

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

    @Override
    public Date getDate() {
        return date;
    }

    @Override
    public void setName(String name) {
        this.name = name;
    }

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

    @Override
    public void setType(String type) {
        this.type = type;
    }

    @Override

    public AbstractArchiveTask getArchiveTask() {
        return archiveTask;
    }

    @Override
    public void setName(String name) {
        this.name = name;
    }

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

    @Override
    public void setType(String type) {
        this.type = type;
    }

    @Override