}
    }

    public void test_getDecodeText() throws Exception {
        assertEquals("", emlExtractor.getDecodeText(null));
        assertEquals("", emlExtractor.getDecodeText(""));
        assertEquals("abc123", emlExtractor.getDecodeText("abc123"));
        assertEquals("テスト", emlExtractor.getDecodeText("=?UTF-8?B?44OG44K544OI?="));
    }

    public void test_getTextWithAttachment() throws IOException {