Artifact artifact = new Artifact("fess-theme-simple", "1.0.0");
        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);
    }