* @throws ThemeException if installation fails
     */
    public void install(final Artifact artifact) {
        final Path jarPath = getJarFile(artifact);
        final String themeName = getThemeName(artifact);
        if (logger.isDebugEnabled()) {
            logger.debug("Theme: {}", themeName);
        }
        try (ZipInputStream zis = new ZipInputStream(Files.newInputStream(jarPath))) {

        String themeName = themeHelper.getThemeName(artifact);
        assertEquals("simple", themeName);
    }

    public void test_getThemeName_multiPart() {
        Artifact artifact = new Artifact("fess-theme-elegant-modern", "1.0.0");
        String themeName = themeHelper.getThemeName(artifact);
        assertEquals("elegant-modern", themeName);
    }