"application/vnd.openxmlformats-officedocument.wordprocessingml.document", "text/html", "text/plain", "application/json",
                "application/xml", "audio/mp3", "video/mp4", "application/postscript" };

        for (final String mimeType : mimeTypes) {
            assertEquals("Extension for " + mimeType + " should be empty", "", generator.getExtensionFromMimeType(mimeType));