Check in the pristine copy of ICU 4.6...

icu46/source/test/intltest/csdetest.cpp

+/*
+ **********************************************************************
+ *   Copyright (C) 2005-2009, International Business Machines
+ *   Corporation and others.  All Rights Reserved.
+ **********************************************************************
+ */
+
+
+#include "unicode/utypes.h"
+#include "unicode/ucsdet.h"
+#include "unicode/ucnv.h"
+#include "unicode/unistr.h"
+#include "unicode/putil.h"
+#include "unicode/uniset.h"
+
+#include "intltest.h"
+#include "csdetest.h"
+
+#include "xmlparser.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef DEBUG_DETECT
+#include <stdio.h>
+#endif
+
+#define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
+
+#define NEW_ARRAY(type,count) (type *) /*uprv_*/malloc((count) * sizeof(type))
+#define DELETE_ARRAY(array) /*uprv_*/free((void *) (array))
+
+#define CH_SPACE 0x0020
+#define CH_SLASH 0x002F
+
+//---------------------------------------------------------------------------
+//
+//  Test class boilerplate
+//
+//---------------------------------------------------------------------------
+CharsetDetectionTest::CharsetDetectionTest()
+{
+}
+
+
+CharsetDetectionTest::~CharsetDetectionTest()
+{
+}
+
+
+
+void CharsetDetectionTest::runIndexedTest( int32_t index, UBool exec, const char* &name, char* /*par*/ )
+{
+    if (exec) logln("TestSuite CharsetDetectionTest: ");
+    switch (index) {
+       case 0: name = "ConstructionTest";
+            if (exec) ConstructionTest();
+            break;
+
+       case 1: name = "UTF8Test";
+            if (exec) UTF8Test();
+            break;
+
+       case 2: name = "UTF16Test";
+            if (exec) UTF16Test();
+            break;
+
+       case 3: name = "C1BytesTest";
+            if (exec) C1BytesTest();
+            break;
+
+       case 4: name = "InputFilterTest";
+            if (exec) InputFilterTest();
+            break;
+
+       case 5: name = "DetectionTest";
+            if (exec) DetectionTest();
+            break;
+#if !UCONFIG_NO_LEGACY_CONVERSION
+       case 6: name = "IBM424Test";
+            if (exec) IBM424Test();
+            break;
+
+       case 7: name = "IBM420Test";
+            if (exec) IBM420Test();
+            break;
+#else
+       case 6:
+       case 7: name = "skip"; break;
+#endif
+       case 8: name = "Ticket6394Test";
+            if (exec) Ticket6394Test();
+            break;
+
+        default: name = "";
+            break; //needed to end loop
+    }
+}
+
+static UnicodeString *split(const UnicodeString &src, UChar ch, int32_t &splits)
+{
+    int32_t offset = -1;
+
+    splits = 1;
+    while((offset = src.indexOf(ch, offset + 1)) >= 0) {
+        splits += 1;
+    }
+
+    UnicodeString *result = new UnicodeString[splits];
+
+    int32_t start = 0;
+    int32_t split = 0;
+    int32_t end;
+
+    while((end = src.indexOf(ch, start)) >= 0) {
+        src.extractBetween(start, end, result[split++]);
+        start = end + 1;
+    }
+
+    src.extractBetween(start, src.length(), result[split]);
+
+    return result;
+}
+
+static char *extractBytes(const UnicodeString &source, const char *codepage, int32_t &length)
+{
+    int32_t sLength = source.length();
+    char *bytes = NULL;
+
+    length = source.extract(0, sLength, NULL, codepage);
+
+    if (length > 0) {
+        bytes = NEW_ARRAY(char, length + 1);
+        source.extract(0, sLength, bytes, codepage);
+    }
+    
+    return bytes;
+}
+
+static void freeBytes(char *bytes)
+{
+    DELETE_ARRAY(bytes);
+}
+
+void CharsetDetectionTest::checkEncoding(const UnicodeString &testString, const UnicodeString &encoding, const UnicodeString &id)
+{
+    int32_t splits = 0;
+    int32_t testLength = testString.length();
+    UnicodeString *eSplit = split(encoding, CH_SLASH, splits);
+    UErrorCode status = U_ZERO_ERROR;
+    int32_t cpLength = eSplit[0].length();
+    char codepage[64];
+
+    u_UCharsToChars(eSplit[0].getBuffer(), codepage, cpLength);
+    codepage[cpLength] = '\0';
+
+    LocalUCharsetDetectorPointer csd(ucsdet_open(&status));
+
+    int32_t byteLength = 0;
+    char *bytes = extractBytes(testString, codepage, byteLength);
+
+    if (bytes == NULL) {
+#if !UCONFIG_NO_LEGACY_CONVERSION
+        errln("Can't open a " + encoding + " converter for " + id);
+#endif
+        return;
+    }
+
+    ucsdet_setText(csd.getAlias(), bytes, byteLength, &status);
+
+    int32_t matchCount = 0;
+    const UCharsetMatch **matches = ucsdet_detectAll(csd.getAlias(), &matchCount, &status);
+
+
+    UnicodeString name(ucsdet_getName(matches[0], &status));
+    UnicodeString lang(ucsdet_getLanguage(matches[0], &status));
+    UChar *decoded = NULL;
+    int32_t dLength = 0;
+
+    if (matchCount == 0) {
+        errln("Encoding detection failure for " + id + ": expected " + eSplit[0] + ", got no matches");
+        goto bail;
+    }
+
+    if (name.compare(eSplit[0]) != 0) {
+        errln("Encoding detection failure for " + id + ": expected " + eSplit[0] + ", got " + name);
+
+#ifdef DEBUG_DETECT
+        for (int32_t m = 0; m < matchCount; m += 1) {
+            const char *name = ucsdet_getName(matches[m], &status);
+            const char *lang = ucsdet_getLanguage(matches[m], &status);
+            int32_t confidence = ucsdet_getConfidence(matches[m], &status);
+
+            printf("%s (%s) %d\n", name, lang, confidence);
+        }
+#endif
+        goto bail;
+    }
+
+    if (splits > 1 && lang.compare(eSplit[1]) != 0) {
+        errln("Language detection failure for " + id + ", " + eSplit[0] + ": expected " + eSplit[1] + ", got " + lang);
+        goto bail;
+    }
+
+    decoded = NEW_ARRAY(UChar, testLength);
+    dLength = ucsdet_getUChars(matches[0], decoded, testLength, &status);
+
+    if (testString.compare(decoded, dLength) != 0) {
+        errln("Round-trip error for " + id + ", " + eSplit[0] + ": getUChars() didn't yeild the original string.");
+
+#ifdef DEBUG_DETECT
+        for(int32_t i = 0; i < testLength; i += 1) {
+            if(testString[i] != decoded[i]) {
+                printf("Strings differ at byte %d\n", i);
+                break;
+            }
+        }
+#endif
+
+    }
+
+    DELETE_ARRAY(decoded);
+
+bail:
+    freeBytes(bytes);
+    delete[] eSplit;
+}
+
+const char *CharsetDetectionTest::getPath(char buffer[2048], const char *filename) {
+    UErrorCode status = U_ZERO_ERROR;
+    const char *testDataDirectory = IntlTest::getSourceTestData(status);
+
+    if (U_FAILURE(status)) {
+        errln("ERROR: getPath() failed - %s", u_errorName(status));
+        return NULL;
+    }
+
+    strcpy(buffer, testDataDirectory);
+    strcat(buffer, filename);
+    return buffer;
+}
+
+void CharsetDetectionTest::ConstructionTest()
+{
+    IcuTestErrorCode status(*this, "ConstructionTest");
+    LocalUCharsetDetectorPointer csd(ucsdet_open(status));
+    LocalUEnumerationPointer e(ucsdet_getAllDetectableCharsets(csd.getAlias(), status));
+    int32_t count = uenum_count(e.getAlias(), status);
+
+#ifdef DEBUG_DETECT
+    printf("There are %d recognizers.\n", count);
+#endif
+
+    for(int32_t i = 0; i < count; i += 1) {
+        int32_t length;
+        const char *name = uenum_next(e.getAlias(), &length, status);
+
+        if(name == NULL || length <= 0) {
+            errln("ucsdet_getAllDetectableCharsets() returned a null or empty name!");
+        }
+
+#ifdef DEBUG_DETECT
+        printf("%s\n", name);
+#endif
+    }
+}
+
+void CharsetDetectionTest::UTF8Test()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UnicodeString ss = "This is a string with some non-ascii characters that will "
+                       "be converted to UTF-8, then shoved through the detection process.  "
+                       "\\u0391\\u0392\\u0393\\u0394\\u0395"
+                       "Sure would be nice if our source could contain Unicode directly!";
+    UnicodeString s = ss.unescape();
+    int32_t byteLength = 0, sLength = s.length();
+    char *bytes = extractBytes(s, "UTF-8", byteLength);
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    UChar *detected = NEW_ARRAY(UChar, sLength);
+
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Detection failure for UTF-8: got no matches.");
+        goto bail;
+    }
+
+    ucsdet_getUChars(match, detected, sLength, &status);
+
+    if (s.compare(detected, sLength) != 0) {
+        errln("Round-trip test failed!");
+    }
+
+    ucsdet_setDeclaredEncoding(csd, "UTF-8", 5, &status); /* for coverage */
+
+bail:
+    DELETE_ARRAY(detected);
+    freeBytes(bytes);
+    ucsdet_close(csd);
+}
+
+void CharsetDetectionTest::UTF16Test()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    /* Notice the BOM on the start of this string */
+    UChar chars[] = {
+        0xFEFF, 0x0623, 0x0648, 0x0631, 0x0648, 0x0628, 0x0627, 0x002C,
+        0x0020, 0x0628, 0x0631, 0x0645, 0x062c, 0x064a, 0x0627, 0x062a,
+        0x0020, 0x0627, 0x0644, 0x062d, 0x0627, 0x0633, 0x0648, 0x0628,
+        0x0020, 0x002b, 0x0020, 0x0627, 0x0646, 0x062a, 0x0631, 0x0646,
+        0x064a, 0x062a, 0x0000};
+    UnicodeString s(chars);
+    int32_t beLength = 0, leLength = 0;
+    char *beBytes = extractBytes(s, "UTF-16BE", beLength);
+    char *leBytes = extractBytes(s, "UTF-16LE", leLength);
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+    int32_t conf;
+
+    ucsdet_setText(csd, beBytes, beLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Encoding detection failure for UTF-16BE: got no matches.");
+        goto try_le;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    conf  = ucsdet_getConfidence(match, &status);
+
+    if (strcmp(name, "UTF-16BE") != 0) {
+        errln("Encoding detection failure for UTF-16BE: got %s", name);
+        goto try_le; // no point in looking at confidence if we got the wrong character set.
+    }
+
+    if (conf != 100) {
+        errln("Did not get 100%% confidence for UTF-16BE: got %d", conf);
+    }
+
+try_le:
+    ucsdet_setText(csd, leBytes, leLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Encoding detection failure for UTF-16LE: got no matches.");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    conf = ucsdet_getConfidence(match, &status);
+
+
+    if (strcmp(name, "UTF-16LE") != 0) {
+        errln("Enconding detection failure for UTF-16LE: got %s", name);
+        goto bail; // no point in looking at confidence if we got the wrong character set.
+    }
+
+    if (conf != 100) {
+        errln("Did not get 100%% confidence for UTF-16LE: got %d", conf);
+    }
+
+bail:
+    freeBytes(leBytes);
+    freeBytes(beBytes);
+    ucsdet_close(csd);
+}
+
+void CharsetDetectionTest::InputFilterTest()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    UnicodeString ss = "<a> <lot> <of> <English> <inside> <the> <markup> Un tr\\u00E8s petit peu de Fran\\u00E7ais. <to> <confuse> <the> <detector>";
+    UnicodeString s  = ss.unescape();
+    int32_t byteLength = 0;
+    char *bytes = extractBytes(s, "ISO-8859-1", byteLength);
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *lang, *name;
+
+    ucsdet_enableInputFilter(csd, TRUE);
+
+    if (!ucsdet_isInputFilterEnabled(csd)) {
+        errln("ucsdet_enableInputFilter(csd, TRUE) did not enable input filter!");
+    }
+
+
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Turning on the input filter resulted in no matches.");
+        goto turn_off;
+    }
+
+    name = ucsdet_getName(match, &status);
+
+    if (name == NULL || strcmp(name, "ISO-8859-1") != 0) {
+        errln("Turning on the input filter resulted in %s rather than ISO-8859-1.", name);
+    } else {
+        lang = ucsdet_getLanguage(match, &status);
+
+        if (lang == NULL || strcmp(lang, "fr") != 0) {
+            errln("Input filter did not strip markup!");
+        }
+    }
+
+turn_off:
+    ucsdet_enableInputFilter(csd, FALSE);
+    ucsdet_setText(csd, bytes, byteLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Turning off the input filter resulted in no matches.");
+        goto bail;
+    }
+
+    name = ucsdet_getName(match, &status);
+
+    if (name == NULL || strcmp(name, "ISO-8859-1") != 0) {
+        errln("Turning off the input filter resulted in %s rather than ISO-8859-1.", name);
+    } else {
+        lang = ucsdet_getLanguage(match, &status);
+
+        if (lang == NULL || strcmp(lang, "en") != 0) {
+            errln("Unfiltered input did not detect as English!");
+        }
+    }
+
+bail:
+    freeBytes(bytes);
+    ucsdet_close(csd);
+}
+
+void CharsetDetectionTest::C1BytesTest()
+{
+#if !UCONFIG_NO_LEGACY_CONVERSION
+    UErrorCode status = U_ZERO_ERROR;
+    UnicodeString sISO = "This is a small sample of some English text. Just enough to be sure that it detects correctly.";
+    UnicodeString ssWindows("This is another small sample of some English text. Just enough to be sure that it detects correctly. It also includes some \\u201CC1\\u201D bytes.", -1, US_INV);
+    UnicodeString sWindows  = ssWindows.unescape();
+    int32_t lISO = 0, lWindows = 0;
+    char *bISO = extractBytes(sISO, "ISO-8859-1", lISO);
+    char *bWindows = extractBytes(sWindows, "windows-1252", lWindows);
+    UCharsetDetector *csd = ucsdet_open(&status);
+    const UCharsetMatch *match;
+    const char *name;
+
+    ucsdet_setText(csd, bWindows, lWindows, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errcheckln(status, "English test with C1 bytes got no matches. - %s", u_errorName(status));
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+
+    if (strcmp(name, "windows-1252") != 0) {
+        errln("English text with C1 bytes does not detect as windows-1252, but as %s", name);
+    }
+
+    ucsdet_setText(csd, bISO, lISO, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("English text without C1 bytes got no matches.");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+
+    if (strcmp(name, "ISO-8859-1") != 0) {
+        errln("English text without C1 bytes does not detect as ISO-8859-1, but as %s", name);
+    }
+
+bail:
+    freeBytes(bWindows);
+    freeBytes(bISO);
+
+    ucsdet_close(csd);
+#endif
+}
+
+void CharsetDetectionTest::DetectionTest()
+{
+#if !UCONFIG_NO_REGULAR_EXPRESSIONS
+    UErrorCode status = U_ZERO_ERROR;
+    char path[2048];
+    const char *testFilePath = getPath(path, "csdetest.xml");
+
+    if (testFilePath == NULL) {
+        return; /* Couldn't get path: error message already output. */
+    }
+
+    UXMLParser  *parser = UXMLParser::createParser(status);
+    if (U_FAILURE(status)) {
+        dataerrln("FAIL: UXMLParser::createParser (%s)", u_errorName(status));
+        return;
+    }
+
+    UXMLElement *root   = parser->parseFile(testFilePath, status);
+    if (!assertSuccess( "parseFile",status)) return;
+
+    UnicodeString test_case = UNICODE_STRING_SIMPLE("test-case");
+    UnicodeString id_attr   = UNICODE_STRING_SIMPLE("id");
+    UnicodeString enc_attr  = UNICODE_STRING_SIMPLE("encodings");
+
+    const UXMLElement *testCase;
+    int32_t tc = 0;
+
+    while((testCase = root->nextChildElement(tc)) != NULL) {
+        if (testCase->getTagName().compare(test_case) == 0) {
+            const UnicodeString *id = testCase->getAttribute(id_attr);
+            const UnicodeString *encodings = testCase->getAttribute(enc_attr);
+            const UnicodeString  text = testCase->getText(TRUE);
+            int32_t encodingCount;
+            UnicodeString *encodingList = split(*encodings, CH_SPACE, encodingCount);
+
+            for(int32_t e = 0; e < encodingCount; e += 1) {
+                checkEncoding(text, encodingList[e], *id);
+            }
+
+            delete[] encodingList;
+        }
+    }
+
+    delete root;
+    delete parser;
+#endif
+}
+
+void CharsetDetectionTest::IBM424Test()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    
+    static const UChar chars[] = {
+            0x05D4, 0x05E4, 0x05E8, 0x05E7, 0x05DC, 0x05D9, 0x05D8, 0x0020, 0x05D4, 0x05E6, 0x05D1, 0x05D0, 0x05D9, 0x0020, 0x05D4, 0x05E8,
+            0x05D0, 0x05E9, 0x05D9, 0x002C, 0x0020, 0x05EA, 0x05EA, 0x0020, 0x05D0, 0x05DC, 0x05D5, 0x05E3, 0x0020, 0x05D0, 0x05D1, 0x05D9,
+            0x05D7, 0x05D9, 0x0020, 0x05DE, 0x05E0, 0x05D3, 0x05DC, 0x05D1, 0x05DC, 0x05D9, 0x05D8, 0x002C, 0x0020, 0x05D4, 0x05D5, 0x05E8,
+            0x05D4, 0x0020, 0x05E2, 0x05DC, 0x0020, 0x05E4, 0x05EA, 0x05D9, 0x05D7, 0x05EA, 0x0020, 0x05D7, 0x05E7, 0x05D9, 0x05E8, 0x05EA,
+            0x0020, 0x05DE, 0x05E6, 0x0022, 0x05D7, 0x0020, 0x05D1, 0x05E2, 0x05E7, 0x05D1, 0x05D5, 0x05EA, 0x0020, 0x05E2, 0x05D3, 0x05D5,
+            0x05D9, 0x05D5, 0x05EA, 0x0020, 0x05D7, 0x05D9, 0x05D9, 0x05DC, 0x05D9, 0x0020, 0x05E6, 0x05D4, 0x0022, 0x05DC, 0x0020, 0x05DE,
+            0x05DE, 0x05D1, 0x05E6, 0x05E2, 0x0020, 0x05E2, 0x05D5, 0x05E4, 0x05E8, 0x05EA, 0x0020, 0x05D9, 0x05E6, 0x05D5, 0x05E7, 0x05D4,
+            0x0020, 0x05D1, 0x002B, 0x0020, 0x05E8, 0x05E6, 0x05D5, 0x05E2, 0x05EA, 0x0020, 0x05E2, 0x05D6, 0x05D4, 0x002E, 0x0020, 0x05DC,
+            0x05D3, 0x05D1, 0x05E8, 0x05D9, 0x0020, 0x05D4, 0x05E4, 0x05E6, 0x0022, 0x05E8, 0x002C, 0x0020, 0x05DE, 0x05D4, 0x05E2, 0x05D3,
+            0x05D5, 0x05D9, 0x05D5, 0x05EA, 0x0020, 0x05E2, 0x05D5, 0x05DC, 0x05D4, 0x0020, 0x05EA, 0x05DE, 0x05D5, 0x05E0, 0x05D4, 0x0020,
+            0x05E9, 0x05DC, 0x0020, 0x0022, 0x05D4, 0x05EA, 0x05E0, 0x05D4, 0x05D2, 0x05D5, 0x05EA, 0x0020, 0x05E4, 0x05E1, 0x05D5, 0x05DC,
+            0x05D4, 0x0020, 0x05DC, 0x05DB, 0x05D0, 0x05D5, 0x05E8, 0x05D4, 0x0020, 0x05E9, 0x05DC, 0x0020, 0x05D7, 0x05D9, 0x05D9, 0x05DC,
+            0x05D9, 0x05DD, 0x0020, 0x05D1, 0x05DE, 0x05D4, 0x05DC, 0x05DA, 0x0020, 0x05DE, 0x05D1, 0x05E6, 0x05E2, 0x0020, 0x05E2, 0x05D5,
+            0x05E4, 0x05E8, 0x05EA, 0x0020, 0x05D9, 0x05E6, 0x05D5, 0x05E7, 0x05D4, 0x0022, 0x002E, 0x0020, 0x05DE, 0x05E0, 0x05D3, 0x05DC,
+            0x05D1, 0x05DC, 0x05D9, 0x05D8, 0x0020, 0x05E7, 0x05D9, 0x05D1, 0x05DC, 0x0020, 0x05D0, 0x05EA, 0x0020, 0x05D4, 0x05D7, 0x05DC,
+            0x05D8, 0x05EA, 0x05D5, 0x0020, 0x05DC, 0x05D0, 0x05D7, 0x05E8, 0x0020, 0x05E9, 0x05E2, 0x05D9, 0x05D9, 0x05DF, 0x0020, 0x05D1,
+            0x05EA, 0x05DE, 0x05DC, 0x05D9, 0x05DC, 0x0020, 0x05D4, 0x05E2, 0x05D3, 0x05D5, 0x05D9, 0x05D5, 0x05EA, 0x0000
+    };
+    
+    static const UChar chars_reverse[] = {
+            0x05EA, 0x05D5, 0x05D9, 0x05D5, 0x05D3, 0x05E2, 0x05D4, 0x0020, 0x05DC, 0x05D9, 0x05DC, 0x05DE, 0x05EA,
+            0x05D1, 0x0020, 0x05DF, 0x05D9, 0x05D9, 0x05E2, 0x05E9, 0x0020, 0x05E8, 0x05D7, 0x05D0, 0x05DC, 0x0020, 0x05D5, 0x05EA, 0x05D8,
+            0x05DC, 0x05D7, 0x05D4, 0x0020, 0x05EA, 0x05D0, 0x0020, 0x05DC, 0x05D1, 0x05D9, 0x05E7, 0x0020, 0x05D8, 0x05D9, 0x05DC, 0x05D1,
+            0x05DC, 0x05D3, 0x05E0, 0x05DE, 0x0020, 0x002E, 0x0022, 0x05D4, 0x05E7, 0x05D5, 0x05E6, 0x05D9, 0x0020, 0x05EA, 0x05E8, 0x05E4,
+            0x05D5, 0x05E2, 0x0020, 0x05E2, 0x05E6, 0x05D1, 0x05DE, 0x0020, 0x05DA, 0x05DC, 0x05D4, 0x05DE, 0x05D1, 0x0020, 0x05DD, 0x05D9,
+            0x05DC, 0x05D9, 0x05D9, 0x05D7, 0x0020, 0x05DC, 0x05E9, 0x0020, 0x05D4, 0x05E8, 0x05D5, 0x05D0, 0x05DB, 0x05DC, 0x0020, 0x05D4,
+            0x05DC, 0x05D5, 0x05E1, 0x05E4, 0x0020, 0x05EA, 0x05D5, 0x05D2, 0x05D4, 0x05E0, 0x05EA, 0x05D4, 0x0022, 0x0020, 0x05DC, 0x05E9,
+            0x0020, 0x05D4, 0x05E0, 0x05D5, 0x05DE, 0x05EA, 0x0020, 0x05D4, 0x05DC, 0x05D5, 0x05E2, 0x0020, 0x05EA, 0x05D5, 0x05D9, 0x05D5,
+            0x05D3, 0x05E2, 0x05D4, 0x05DE, 0x0020, 0x002C, 0x05E8, 0x0022, 0x05E6, 0x05E4, 0x05D4, 0x0020, 0x05D9, 0x05E8, 0x05D1, 0x05D3,
+            0x05DC, 0x0020, 0x002E, 0x05D4, 0x05D6, 0x05E2, 0x0020, 0x05EA, 0x05E2, 0x05D5, 0x05E6, 0x05E8, 0x0020, 0x002B, 0x05D1, 0x0020,
+            0x05D4, 0x05E7, 0x05D5, 0x05E6, 0x05D9, 0x0020, 0x05EA, 0x05E8, 0x05E4, 0x05D5, 0x05E2, 0x0020, 0x05E2, 0x05E6, 0x05D1, 0x05DE,
+            0x05DE, 0x0020, 0x05DC, 0x0022, 0x05D4, 0x05E6, 0x0020, 0x05D9, 0x05DC, 0x05D9, 0x05D9, 0x05D7, 0x0020, 0x05EA, 0x05D5, 0x05D9,
+            0x05D5, 0x05D3, 0x05E2, 0x0020, 0x05EA, 0x05D5, 0x05D1, 0x05E7, 0x05E2, 0x05D1, 0x0020, 0x05D7, 0x0022, 0x05E6, 0x05DE, 0x0020,
+            0x05EA, 0x05E8, 0x05D9, 0x05E7, 0x05D7, 0x0020, 0x05EA, 0x05D7, 0x05D9, 0x05EA, 0x05E4, 0x0020, 0x05DC, 0x05E2, 0x0020, 0x05D4,
+            0x05E8, 0x05D5, 0x05D4, 0x0020, 0x002C, 0x05D8, 0x05D9, 0x05DC, 0x05D1, 0x05DC, 0x05D3, 0x05E0, 0x05DE, 0x0020, 0x05D9, 0x05D7,
+            0x05D9, 0x05D1, 0x05D0, 0x0020, 0x05E3, 0x05D5, 0x05DC, 0x05D0, 0x0020, 0x05EA, 0x05EA, 0x0020, 0x002C, 0x05D9, 0x05E9, 0x05D0,
+            0x05E8, 0x05D4, 0x0020, 0x05D9, 0x05D0, 0x05D1, 0x05E6, 0x05D4, 0x0020, 0x05D8, 0x05D9, 0x05DC, 0x05E7, 0x05E8, 0x05E4, 0x05D4,
+            0x0000
+    };
+
+    int32_t bLength = 0, brLength = 0;
+    
+    UnicodeString s1(chars);
+    UnicodeString s2(chars_reverse);
+    
+    char *bytes = extractBytes(s1, "IBM424", bLength);
+    char *bytes_r = extractBytes(s2, "IBM424", brLength);
+    
+    UCharsetDetector *csd = ucsdet_open(&status);
+    if (U_FAILURE(status)) {
+        errln("Error opening charset detector. - %s", u_errorName(status));
+    }
+    const UCharsetMatch *match;
+    const char *name;
+
+    ucsdet_setText(csd, bytes, bLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errcheckln(status, "Encoding detection failure for IBM424_rtl: got no matches. - %s", u_errorName(status));
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM424_rtl") != 0) {
+        errln("Encoding detection failure for IBM424_rtl: got %s", name);
+    }
+    
+    ucsdet_setText(csd, bytes_r, brLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Encoding detection failure for IBM424_ltr: got no matches.");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM424_ltr") != 0) {
+        errln("Encoding detection failure for IBM424_ltr: got %s", name);
+    }
+
+bail:
+    freeBytes(bytes);
+    freeBytes(bytes_r);
+    ucsdet_close(csd);
+}
+
+void CharsetDetectionTest::IBM420Test()
+{
+    UErrorCode status = U_ZERO_ERROR;
+    
+    static const UChar chars[] = {
+        0x0648, 0x064F, 0x0636, 0x0639, 0x062A, 0x0020, 0x0648, 0x0646, 0x064F, 0x0641, 0x0630, 0x062A, 0x0020, 0x0628, 0x0631, 0x0627,
+        0x0645, 0x062C, 0x0020, 0x062A, 0x0623, 0x0645, 0x064A, 0x0646, 0x0020, 0x0639, 0x062F, 0x064A, 0x062F, 0x0629, 0x0020, 0x0641,
+        0x064A, 0x0020, 0x0645, 0x0624, 0x0633, 0x0633, 0x0629, 0x0020, 0x0627, 0x0644, 0x062A, 0x0623, 0x0645, 0x064A, 0x0646, 0x0020,
+        0x0627, 0x0644, 0x0648, 0x0637, 0x0646, 0x064A, 0x002C, 0x0020, 0x0645, 0x0639, 0x0020, 0x0645, 0x0644, 0x0627, 0x0626, 0x0645,
+        0x062A, 0x0647, 0x0627, 0x0020, 0x062F, 0x0627, 0x0626, 0x0645, 0x0627, 0x064B, 0x0020, 0x0644, 0x0644, 0x0627, 0x062D, 0x062A,
+        0x064A, 0x0627, 0x062C, 0x0627, 0x062A, 0x0020, 0x0627, 0x0644, 0x0645, 0x062A, 0x063A, 0x064A, 0x0631, 0x0629, 0x0020, 0x0644,
+        0x0644, 0x0645, 0x062C, 0x062A, 0x0645, 0x0639, 0x0020, 0x0648, 0x0644, 0x0644, 0x062F, 0x0648, 0x0644, 0x0629, 0x002E, 0x0020,
+        0x062A, 0x0648, 0x0633, 0x0639, 0x062A, 0x0020, 0x0648, 0x062A, 0x0637, 0x0648, 0x0631, 0x062A, 0x0020, 0x0627, 0x0644, 0x0645,
+        0x0624, 0x0633, 0x0633, 0x0629, 0x0020, 0x0628, 0x0647, 0x062F, 0x0641, 0x0020, 0x0636, 0x0645, 0x0627, 0x0646, 0x0020, 0x0634,
+        0x0628, 0x0643, 0x0629, 0x0020, 0x0623, 0x0645, 0x0627, 0x0646, 0x0020, 0x0644, 0x0633, 0x0643, 0x0627, 0x0646, 0x0020, 0x062F,
+        0x0648, 0x0644, 0x0629, 0x0020, 0x0627, 0x0633, 0x0631, 0x0627, 0x0626, 0x064A, 0x0644, 0x0020, 0x0628, 0x0648, 0x062C, 0x0647,
+        0x0020, 0x0627, 0x0644, 0x0645, 0x062E, 0x0627, 0x0637, 0x0631, 0x0020, 0x0627, 0x0644, 0x0627, 0x0642, 0x062A, 0x0635, 0x0627,
+        0x062F, 0x064A, 0x0629, 0x0020, 0x0648, 0x0627, 0x0644, 0x0627, 0x062C, 0x062A, 0x0645, 0x0627, 0x0639, 0x064A, 0x0629, 0x002E,
+        0x0000
+    };
+    static const UChar chars_reverse[] = {
+        0x002E, 0x0629, 0x064A, 0x0639, 0x0627, 0x0645, 0x062A, 0x062C, 0x0627, 0x0644, 0x0627, 0x0648, 0x0020, 0x0629, 0x064A, 0x062F,
+        0x0627, 0x0635, 0x062A, 0x0642, 0x0627, 0x0644, 0x0627, 0x0020, 0x0631, 0x0637, 0x0627, 0x062E, 0x0645, 0x0644, 0x0627, 0x0020,
+        0x0647, 0x062C, 0x0648, 0x0628, 0x0020, 0x0644, 0x064A, 0x0626, 0x0627, 0x0631, 0x0633, 0x0627, 0x0020, 0x0629, 0x0644, 0x0648,
+        0x062F, 0x0020, 0x0646, 0x0627, 0x0643, 0x0633, 0x0644, 0x0020, 0x0646, 0x0627, 0x0645, 0x0623, 0x0020, 0x0629, 0x0643, 0x0628,
+        0x0634, 0x0020, 0x0646, 0x0627, 0x0645, 0x0636, 0x0020, 0x0641, 0x062F, 0x0647, 0x0628, 0x0020, 0x0629, 0x0633, 0x0633, 0x0624,
+        0x0645, 0x0644, 0x0627, 0x0020, 0x062A, 0x0631, 0x0648, 0x0637, 0x062A, 0x0648, 0x0020, 0x062A, 0x0639, 0x0633, 0x0648, 0x062A,
+        0x0020, 0x002E, 0x0629, 0x0644, 0x0648, 0x062F, 0x0644, 0x0644, 0x0648, 0x0020, 0x0639, 0x0645, 0x062A, 0x062C, 0x0645, 0x0644,
+        0x0644, 0x0020, 0x0629, 0x0631, 0x064A, 0x063A, 0x062A, 0x0645, 0x0644, 0x0627, 0x0020, 0x062A, 0x0627, 0x062C, 0x0627, 0x064A,
+        0x062A, 0x062D, 0x0627, 0x0644, 0x0644, 0x0020, 0x064B, 0x0627, 0x0645, 0x0626, 0x0627, 0x062F, 0x0020, 0x0627, 0x0647, 0x062A,
+        0x0645, 0x0626, 0x0627, 0x0644, 0x0645, 0x0020, 0x0639, 0x0645, 0x0020, 0x002C, 0x064A, 0x0646, 0x0637, 0x0648, 0x0644, 0x0627,
+        0x0020, 0x0646, 0x064A, 0x0645, 0x0623, 0x062A, 0x0644, 0x0627, 0x0020, 0x0629, 0x0633, 0x0633, 0x0624, 0x0645, 0x0020, 0x064A,
+        0x0641, 0x0020, 0x0629, 0x062F, 0x064A, 0x062F, 0x0639, 0x0020, 0x0646, 0x064A, 0x0645, 0x0623, 0x062A, 0x0020, 0x062C, 0x0645,
+        0x0627, 0x0631, 0x0628, 0x0020, 0x062A, 0x0630, 0x0641, 0x064F, 0x0646, 0x0648, 0x0020, 0x062A, 0x0639, 0x0636, 0x064F, 0x0648,
+        0x0000,
+    };
+    
+    int32_t bLength = 0, brLength = 0;
+    
+    UnicodeString s1(chars);
+    UnicodeString s2(chars_reverse);
+    
+    char *bytes = extractBytes(s1, "IBM420", bLength);
+    char *bytes_r = extractBytes(s2, "IBM420", brLength);
+    
+    UCharsetDetector *csd = ucsdet_open(&status);
+    if (U_FAILURE(status)) {
+        errln("Error opening charset detector. - %s", u_errorName(status));
+    }
+    const UCharsetMatch *match;
+    const char *name;
+
+    ucsdet_setText(csd, bytes, bLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errcheckln(status, "Encoding detection failure for IBM420_rtl: got no matches. - %s", u_errorName(status));
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM420_rtl") != 0) {
+        errln("Encoding detection failure for IBM420_rtl: got %s\n", name);
+    }
+    
+    ucsdet_setText(csd, bytes_r, brLength, &status);
+    match = ucsdet_detect(csd, &status);
+
+    if (match == NULL) {
+        errln("Encoding detection failure for IBM420_ltr: got no matches.\n");
+        goto bail;
+    }
+
+    name  = ucsdet_getName(match, &status);
+    if (strcmp(name, "IBM420_ltr") != 0) {
+        errln("Encoding detection failure for IBM420_ltr: got %s\n", name);
+    }
+
+bail:
+    freeBytes(bytes);
+    freeBytes(bytes_r);
+    ucsdet_close(csd);
+}
+
+
+void CharsetDetectionTest::Ticket6394Test() {
+#if !UCONFIG_NO_CONVERSION
+    const char charText[] =  "Here is some random English text that should be detected as ISO-8859-1."
+                             "Ticket 6394 claims that ISO-8859-1 will appear in the array of detected "
+                             "encodings more than once.  The hop through UnicodeString is for platforms " 
+                             "where this char * string is be EBCDIC and needs conversion to Latin1.";
+    char latin1Text[sizeof(charText)];
+    UnicodeString(charText).extract(0, sizeof(charText)-2, latin1Text, sizeof(latin1Text), "ISO-8859-1");
+
+    UErrorCode status = U_ZERO_ERROR;
+    UCharsetDetector *csd = ucsdet_open(&status);
+    ucsdet_setText(csd, latin1Text, -1, &status);
+    if (U_FAILURE(status)) {
+        errln("Fail at file %s, line %d.  status = %s", __FILE__, __LINE__, u_errorName(status));
+        return;
+    }
+
+    int32_t matchCount = 0;
+    const UCharsetMatch **matches = ucsdet_detectAll(csd, &matchCount, &status);
+    if (U_FAILURE(status)) {
+        errln("Fail at file %s, line %d.  status = %s", __FILE__, __LINE__, u_errorName(status));
+        return;
+    }
+
+    UnicodeSet  setOfCharsetNames;    // UnicodSets can hold strings.
+    int32_t i;
+    for (i=0; i<matchCount; i++) {
+        UnicodeString charSetName(ucsdet_getName(matches[i], &status));
+        if (U_FAILURE(status)) {
+            errln("Fail at file %s, line %d.  status = %s;  i=%d", __FILE__, __LINE__, u_errorName(status), i);
+            status = U_ZERO_ERROR;
+        }
+        if (setOfCharsetNames.contains(charSetName)) {
+            errln("Fail at file %s, line %d ", __FILE__, __LINE__);
+            errln(UnicodeString("   Duplicate charset name = ") + charSetName);
+        }
+        setOfCharsetNames.add(charSetName);
+    }
+    ucsdet_close(csd);
+#endif
+}
+