@Test
    public void testUnicodeUCNControlWordCharacterDoublingExtraction() throws Exception {
        String content = getText("testRTFUnicodeUCNControlWordCharacterDoubling.rtf");

        assertContains("\u5E74", content);
        assertContains("\u5ff5", content);
        assertContains("0 ", content);
        assertContains("abc", content);
        assertFalse(content.contains("\u5E74\u5E74"), "Doubled character \u5E74");
    }
Junit test class for the Tika {@link RTFParser}
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/test/java/org/apache/tika/parser/microsoft/rtf/RTFParserTest.java