### Question:
StringUtil { public static boolean containNonAsciiPrintableChars(String decodeUri) { if (StringUtils.isBlank(decodeUri)) { return false; } return !StringUtils.isAsciiPrintable(decodeUri); } private  StringUtil(); static List<MediaType> parseMediaTypes(String mediaTypesStr); static MediaType parseMediaType(String mediaTypeStr); static boolean containNonAsciiPrintableChars(String decodeUri); static String generateEncodedRedirectURL(String param,
            String servicePartUri, String baseUrl); static List<String> parseSeparatedStringToListIfListIsNull(
            String separatedStr, List<String> list); static String addQuotas(String str); static boolean checkIsValidSearchPattern(String str); static boolean containsAtMostOnce(String str, String searchStr); static boolean isValidEntityHandleOrName(String handle); static String urlEncode(String str); static String getNormalization(String str); static long parseUnsignedLong(String s); static String foldCase(String strParam); static String foldCaseAndNormalization(String strParam); static List<String> getNotEmptyStringList(List<String> stringList); static final String SPACE; static final String TLD_SPLITOR; static final String ASTERISK; static final String CHAR_SET_UTF8; static final String CHAR_SET_ISO8859; static final int MAX_ENTITY_HANDLE_LENGTH; }### Answer:
@Test public void testContainInvalidChar() { assertTrue(StringUtil.containNonAsciiPrintableChars("http: assertTrue(StringUtil.containNonAsciiPrintableChars("http: assertFalse(StringUtil .containNonAsciiPrintableChars("http: assertFalse(StringUtil .containNonAsciiPrintableChars("https: }