assertEquals("abc123", emlExtractor.getDecodeText("abc123"));
        assertEquals("テスト", emlExtractor.getDecodeText("=?UTF-8?B?44OG44K544OI?="));
    }

    public void test_getTextWithAttachment() throws IOException {
        try (final InputStream in = ResourceUtil.getResourceAsStream("extractor/eml/sample4.eml")) {
            ExtractData data = emlExtractor.getText(in, null);