icuSources/test/intltest/strcase.cpp

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 *
   6 *   Copyright (C) 2002-2016, International Business Machines
   7 *   Corporation and others.  All Rights Reserved.
   8 *
   9 *******************************************************************************
  10 *   file name:  strcase.cpp
  11 *   encoding:   UTF-8
  12 *   tab size:   8 (not used)
  13 *   indentation:4
  14 *
  15 *   created on: 2002mar12
  16 *   created by: Markus W. Scherer
  17 *
  18 *   Test file for string casing C++ API functions.
  19 */
  20
  21 #include "unicode/std_string.h"
  22 #include "unicode/brkiter.h"
  23 #include "unicode/casemap.h"
  24 #include "unicode/edits.h"
  25 #include "unicode/uchar.h"
  26 #include "unicode/ures.h"
  27 #include "unicode/uloc.h"
  28 #include "unicode/locid.h"
  29 #include "unicode/ubrk.h"
  30 #include "unicode/unistr.h"
  31 #include "unicode/ucasemap.h"
  32 #include "unicode/ustring.h"
  33 #include "ucase.h"
  34 #include "ustrtest.h"
  35 #include "unicode/tstdtmod.h"
  36 #include "cmemory.h"
  37 #include "testutil.h"
  38
  39 class StringCaseTest: public IntlTest {
  40 public:
  41     StringCaseTest();
  42     virtual ~StringCaseTest();
  43
  44     void runIndexedTest(int32_t index, UBool exec, const char *&name, char *par=0);
  45
  46     void TestCaseConversion();
  47
  48     void TestCasingImpl(const UnicodeString &input,
  49                         const UnicodeString &output,
  50                         int32_t whichCase,
  51                         void *iter, const char *localeID, uint32_t options);
  52     void TestCasing();
  53     void TestTitleOptions();
  54     void TestFullCaseFoldingIterator();
  55     void TestGreekUpper();
  56     void TestLongUpper();
  57     void TestMalformedUTF8();
  58     void TestBufferOverflow();
  59     void TestEdits();
  60     void TestCopyMoveEdits();
  61     void TestEditsFindFwdBwd();
  62     void TestMergeEdits();
  63     void TestCaseMapWithEdits();
  64     void TestCaseMapUTF8WithEdits();
  65     void TestCaseMapToString();
  66     void TestCaseMapUTF8ToString();
  67     void TestLongUnicodeString();
  68     void TestBug13127();
  69     void TestInPlaceTitle();
  70     void TestCaseMapEditsIteratorDocs();
  71     void TestCaseMapGreekExtended();
  72
  73 private:
  74     void assertGreekUpper(const char16_t *s, const char16_t *expected);
  75
  76     Locale GREEK_LOCALE_;
  77 };
  78
  79 StringCaseTest::StringCaseTest() : GREEK_LOCALE_("el") {}
  80
  81 StringCaseTest::~StringCaseTest() {}
  82
  83 extern IntlTest *createStringCaseTest() {
  84     return new StringCaseTest();
  85 }
  86
  87 void
  88 StringCaseTest::runIndexedTest(int32_t index, UBool exec, const char *&name, char * /*par*/) {
  89     if(exec) {
  90         logln("TestSuite StringCaseTest: ");
  91     }
  92     TESTCASE_AUTO_BEGIN;
  93     TESTCASE_AUTO(TestCaseConversion);
  94 #if !UCONFIG_NO_BREAK_ITERATION && !UCONFIG_NO_FILE_IO && !UCONFIG_NO_LEGACY_CONVERSION
  95     TESTCASE_AUTO(TestCasing);
  96     TESTCASE_AUTO(TestTitleOptions);
  97 #endif
  98     TESTCASE_AUTO(TestFullCaseFoldingIterator);
  99     TESTCASE_AUTO(TestGreekUpper);
 100     TESTCASE_AUTO(TestLongUpper);
 101     TESTCASE_AUTO(TestMalformedUTF8);
 102     TESTCASE_AUTO(TestBufferOverflow);
 103     TESTCASE_AUTO(TestEdits);
 104     TESTCASE_AUTO(TestCopyMoveEdits);
 105     TESTCASE_AUTO(TestEditsFindFwdBwd);
 106     TESTCASE_AUTO(TestMergeEdits);
 107     TESTCASE_AUTO(TestCaseMapWithEdits);
 108     TESTCASE_AUTO(TestCaseMapUTF8WithEdits);
 109     TESTCASE_AUTO(TestCaseMapToString);
 110     TESTCASE_AUTO(TestCaseMapUTF8ToString);
 111     TESTCASE_AUTO(TestLongUnicodeString);
 112 #if !UCONFIG_NO_BREAK_ITERATION
 113     TESTCASE_AUTO(TestBug13127);
 114     TESTCASE_AUTO(TestInPlaceTitle);
 115 #endif
 116     TESTCASE_AUTO(TestCaseMapEditsIteratorDocs);
 117     TESTCASE_AUTO(TestCaseMapGreekExtended);
 118     TESTCASE_AUTO_END;
 119 }
 120
 121 void
 122 StringCaseTest::TestCaseConversion()
 123 {
 124     static const UChar uppercaseGreek[] =
 125         { 0x399, 0x395, 0x3a3, 0x3a5, 0x3a3, 0x20, 0x03a7, 0x3a1, 0x399, 0x3a3, 0x3a4,
 126         0x39f, 0x3a3, 0 };
 127         // "IESUS CHRISTOS"
 128
 129     static const UChar lowercaseGreek[] =
 130         { 0x3b9, 0x3b5, 0x3c3, 0x3c5, 0x3c2, 0x20, 0x03c7, 0x3c1, 0x3b9, 0x3c3, 0x3c4,
 131         0x3bf, 0x3c2, 0 };
 132         // "iesus christos"
 133
 134     static const UChar lowercaseTurkish[] =
 135         { 0x69, 0x73, 0x74, 0x61, 0x6e, 0x62, 0x75, 0x6c, 0x2c, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x63, 0x6f,
 136         0x6e, 0x73, 0x74, 0x61, 0x6e, 0x74, 0x0131, 0x6e, 0x6f, 0x70, 0x6c, 0x65, 0x21, 0 };
 137
 138     static const UChar uppercaseTurkish[] =
 139         { 0x54, 0x4f, 0x50, 0x4b, 0x41, 0x50, 0x49, 0x20, 0x50, 0x41, 0x4c, 0x41, 0x43, 0x45, 0x2c, 0x20,
 140         0x0130, 0x53, 0x54, 0x41, 0x4e, 0x42, 0x55, 0x4c, 0 };
 141
 142     UnicodeString expectedResult;
 143     UnicodeString   test3;
 144
 145     test3 += (UChar32)0x0130;
 146     test3 += "STANBUL, NOT CONSTANTINOPLE!";
 147
 148     UnicodeString   test4(test3);
 149     test4.toLower(Locale(""));
 150     expectedResult = UnicodeString("i\\u0307stanbul, not constantinople!", "").unescape();
 151     if (test4 != expectedResult)
 152         errln("1. toLower failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 153
 154     test4 = test3;
 155     test4.toLower(Locale("tr", "TR"));
 156     expectedResult = lowercaseTurkish;
 157     if (test4 != expectedResult)
 158         errln("2. toLower failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 159
 160     test3 = "topkap";
 161     test3 += (UChar32)0x0131;
 162     test3 += " palace, istanbul";
 163     test4 = test3;
 164
 165     test4.toUpper(Locale(""));
 166     expectedResult = "TOPKAPI PALACE, ISTANBUL";
 167     if (test4 != expectedResult)
 168         errln("toUpper failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 169
 170     test4 = test3;
 171     test4.toUpper(Locale("tr", "TR"));
 172     expectedResult = uppercaseTurkish;
 173     if (test4 != expectedResult)
 174         errln("toUpper failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 175
 176     test3 = CharsToUnicodeString("S\\u00FC\\u00DFmayrstra\\u00DFe");
 177
 178     test3.toUpper(Locale("de", "DE"));
 179     expectedResult = CharsToUnicodeString("S\\u00DCSSMAYRSTRASSE");
 180     if (test3 != expectedResult)
 181         errln("toUpper failed: expected \"" + expectedResult + "\", got \"" + test3 + "\".");
 182
 183     test4.replace(0, test4.length(), uppercaseGreek);
 184
 185     test4.toLower(Locale("el", "GR"));
 186     expectedResult = lowercaseGreek;
 187     if (test4 != expectedResult)
 188         errln("toLower failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 189
 190     test4.replace(0, test4.length(), lowercaseGreek);
 191
 192     test4.toUpper();
 193     expectedResult = uppercaseGreek;
 194     if (test4 != expectedResult)
 195         errln("toUpper failed: expected \"" + expectedResult + "\", got \"" + test4 + "\".");
 196
 197     // more string case mapping tests with the new implementation
 198     {
 199         static const UChar
 200
 201         beforeLower[]= { 0x61, 0x42, 0x49,  0x3a3, 0xdf, 0x3a3, 0x2f, 0xd93f, 0xdfff },
 202         lowerRoot[]=   { 0x61, 0x62, 0x69,  0x3c3, 0xdf, 0x3c2, 0x2f, 0xd93f, 0xdfff },
 203         lowerTurkish[]={ 0x61, 0x62, 0x131, 0x3c3, 0xdf, 0x3c2, 0x2f, 0xd93f, 0xdfff },
 204
 205         beforeUpper[]= { 0x61, 0x42, 0x69,  0x3c2, 0xdf,       0x3c3, 0x2f, 0xfb03,           0xfb03,           0xfb03,           0xd93f, 0xdfff },
 206         upperRoot[]=   { 0x41, 0x42, 0x49,  0x3a3, 0x53, 0x53, 0x3a3, 0x2f, 0x46, 0x46, 0x49, 0x46, 0x46, 0x49, 0x46, 0x46, 0x49, 0xd93f, 0xdfff },
 207         upperTurkish[]={ 0x41, 0x42, 0x130, 0x3a3, 0x53, 0x53, 0x3a3, 0x2f, 0x46, 0x46, 0x49, 0x46, 0x46, 0x49, 0x46, 0x46, 0x49, 0xd93f, 0xdfff },
 208
 209         beforeMiniUpper[]=  { 0xdf, 0x61 },
 210         miniUpper[]=        { 0x53, 0x53, 0x41 };
 211
 212         UnicodeString s;
 213
 214         /* lowercase with root locale */
 215         s=UnicodeString(FALSE, beforeLower, UPRV_LENGTHOF(beforeLower));
 216         s.toLower("");
 217         if( s.length()!=UPRV_LENGTHOF(lowerRoot) ||
 218             s!=UnicodeString(FALSE, lowerRoot, s.length())
 219         ) {
 220             errln("error in toLower(root locale)=\"" + s + "\" expected \"" + UnicodeString(FALSE, lowerRoot, UPRV_LENGTHOF(lowerRoot)) + "\"");
 221         }
 222
 223         /* lowercase with turkish locale */
 224         s=UnicodeString(FALSE, beforeLower, UPRV_LENGTHOF(beforeLower));
 225         s.setCharAt(0, beforeLower[0]).toLower(Locale("tr"));
 226         if( s.length()!=UPRV_LENGTHOF(lowerTurkish) ||
 227             s!=UnicodeString(FALSE, lowerTurkish, s.length())
 228         ) {
 229             errln("error in toLower(turkish locale)=\"" + s + "\" expected \"" + UnicodeString(FALSE, lowerTurkish, UPRV_LENGTHOF(lowerTurkish)) + "\"");
 230         }
 231
 232         /* uppercase with root locale */
 233         s=UnicodeString(FALSE, beforeUpper, UPRV_LENGTHOF(beforeUpper));
 234         s.setCharAt(0, beforeUpper[0]).toUpper(Locale(""));
 235         if( s.length()!=UPRV_LENGTHOF(upperRoot) ||
 236             s!=UnicodeString(FALSE, upperRoot, s.length())
 237         ) {
 238             errln("error in toUpper(root locale)=\"" + s + "\" expected \"" + UnicodeString(FALSE, upperRoot, UPRV_LENGTHOF(upperRoot)) + "\"");
 239         }
 240
 241         /* uppercase with turkish locale */
 242         s=UnicodeString(FALSE, beforeUpper, UPRV_LENGTHOF(beforeUpper));
 243         s.toUpper(Locale("tr"));
 244         if( s.length()!=UPRV_LENGTHOF(upperTurkish) ||
 245             s!=UnicodeString(FALSE, upperTurkish, s.length())
 246         ) {
 247             errln("error in toUpper(turkish locale)=\"" + s + "\" expected \"" + UnicodeString(FALSE, upperTurkish, UPRV_LENGTHOF(upperTurkish)) + "\"");
 248         }
 249
 250         /* uppercase a short string with root locale */
 251         s=UnicodeString(FALSE, beforeMiniUpper, UPRV_LENGTHOF(beforeMiniUpper));
 252         s.setCharAt(0, beforeMiniUpper[0]).toUpper("");
 253         if( s.length()!=UPRV_LENGTHOF(miniUpper) ||
 254             s!=UnicodeString(FALSE, miniUpper, s.length())
 255         ) {
 256             errln("error in toUpper(root locale)=\"" + s + "\" expected \"" + UnicodeString(FALSE, miniUpper, UPRV_LENGTHOF(miniUpper)) + "\"");
 257         }
 258     }
 259
 260     // test some supplementary characters (>= Unicode 3.1)
 261     {
 262         UnicodeString t;
 263
 264         UnicodeString
 265             deseretInput=UnicodeString("\\U0001043C\\U00010414", "").unescape(),
 266             deseretLower=UnicodeString("\\U0001043C\\U0001043C", "").unescape(),
 267             deseretUpper=UnicodeString("\\U00010414\\U00010414", "").unescape();
 268         (t=deseretInput).toLower();
 269         if(t!=deseretLower) {
 270             errln("error lowercasing Deseret (plane 1) characters");
 271         }
 272         (t=deseretInput).toUpper();
 273         if(t!=deseretUpper) {
 274             errln("error uppercasing Deseret (plane 1) characters");
 275         }
 276     }
 277
 278     // test some more cases that looked like problems
 279     {
 280         UnicodeString t;
 281
 282         UnicodeString
 283             ljInput=UnicodeString("ab'cD \\uFB00i\\u0131I\\u0130 \\u01C7\\u01C8\\u01C9 \\U0001043C\\U00010414", "").unescape(),
 284             ljLower=UnicodeString("ab'cd \\uFB00i\\u0131ii\\u0307 \\u01C9\\u01C9\\u01C9 \\U0001043C\\U0001043C", "").unescape(),
 285             ljUpper=UnicodeString("AB'CD FFIII\\u0130 \\u01C7\\u01C7\\u01C7 \\U00010414\\U00010414", "").unescape();
 286         (t=ljInput).toLower("en");
 287         if(t!=ljLower) {
 288             errln("error lowercasing LJ characters");
 289         }
 290         (t=ljInput).toUpper("en");
 291         if(t!=ljUpper) {
 292             errln("error uppercasing LJ characters");
 293         }
 294     }
 295
 296 #if !UCONFIG_NO_NORMALIZATION
 297     // some context-sensitive casing depends on normalization data being present
 298
 299     // Unicode 3.1.1 SpecialCasing tests
 300     {
 301         UnicodeString t;
 302
 303         // sigmas preceded and/or followed by cased letters
 304         UnicodeString
 305             sigmas=UnicodeString("i\\u0307\\u03a3\\u0308j \\u0307\\u03a3\\u0308j i\\u00ad\\u03a3\\u0308 \\u0307\\u03a3\\u0308 ", "").unescape(),
 306             sigmasLower=UnicodeString("i\\u0307\\u03c3\\u0308j \\u0307\\u03c3\\u0308j i\\u00ad\\u03c2\\u0308 \\u0307\\u03c3\\u0308 ", "").unescape(),
 307             sigmasUpper=UnicodeString("I\\u0307\\u03a3\\u0308J \\u0307\\u03a3\\u0308J I\\u00ad\\u03a3\\u0308 \\u0307\\u03a3\\u0308 ", "").unescape();
 308
 309         (t=sigmas).toLower();
 310         if(t!=sigmasLower) {
 311             errln("error in sigmas.toLower()=\"" + t + "\" expected \"" + sigmasLower + "\"");
 312         }
 313
 314         (t=sigmas).toUpper(Locale(""));
 315         if(t!=sigmasUpper) {
 316             errln("error in sigmas.toUpper()=\"" + t + "\" expected \"" + sigmasUpper + "\"");
 317         }
 318
 319         // turkish & azerbaijani dotless i & dotted I
 320         // remove dot above if there was a capital I before and there are no more accents above
 321         UnicodeString
 322             dots=UnicodeString("I \\u0130 I\\u0307 I\\u0327\\u0307 I\\u0301\\u0307 I\\u0327\\u0307\\u0301", "").unescape(),
 323             dotsTurkish=UnicodeString("\\u0131 i i i\\u0327 \\u0131\\u0301\\u0307 i\\u0327\\u0301", "").unescape(),
 324             dotsDefault=UnicodeString("i i\\u0307 i\\u0307 i\\u0327\\u0307 i\\u0301\\u0307 i\\u0327\\u0307\\u0301", "").unescape();
 325
 326         (t=dots).toLower("tr");
 327         if(t!=dotsTurkish) {
 328             errln("error in dots.toLower(tr)=\"" + t + "\" expected \"" + dotsTurkish + "\"");
 329         }
 330
 331         (t=dots).toLower("de");
 332         if(t!=dotsDefault) {
 333             errln("error in dots.toLower(de)=\"" + t + "\" expected \"" + dotsDefault + "\"");
 334         }
 335     }
 336
 337     // more Unicode 3.1.1 tests
 338     {
 339         UnicodeString t;
 340
 341         // lithuanian dot above in uppercasing
 342         UnicodeString
 343             dots=UnicodeString("a\\u0307 \\u0307 i\\u0307 j\\u0327\\u0307 j\\u0301\\u0307", "").unescape(),
 344             dotsLithuanian=UnicodeString("A\\u0307 \\u0307 I J\\u0327 J\\u0301\\u0307", "").unescape(),
 345             dotsDefault=UnicodeString("A\\u0307 \\u0307 I\\u0307 J\\u0327\\u0307 J\\u0301\\u0307", "").unescape();
 346
 347         (t=dots).toUpper("lt");
 348         if(t!=dotsLithuanian) {
 349             errln("error in dots.toUpper(lt)=\"" + t + "\" expected \"" + dotsLithuanian + "\"");
 350         }
 351
 352         (t=dots).toUpper("de");
 353         if(t!=dotsDefault) {
 354             errln("error in dots.toUpper(de)=\"" + t + "\" expected \"" + dotsDefault + "\"");
 355         }
 356
 357         // lithuanian adds dot above to i in lowercasing if there are more above accents
 358         UnicodeString
 359             i=UnicodeString("I I\\u0301 J J\\u0301 \\u012e \\u012e\\u0301 \\u00cc\\u00cd\\u0128", "").unescape(),
 360             iLithuanian=UnicodeString("i i\\u0307\\u0301 j j\\u0307\\u0301 \\u012f \\u012f\\u0307\\u0301 i\\u0307\\u0300i\\u0307\\u0301i\\u0307\\u0303", "").unescape(),
 361             iDefault=UnicodeString("i i\\u0301 j j\\u0301 \\u012f \\u012f\\u0301 \\u00ec\\u00ed\\u0129", "").unescape();
 362
 363         (t=i).toLower("lt");
 364         if(t!=iLithuanian) {
 365             errln("error in i.toLower(lt)=\"" + t + "\" expected \"" + iLithuanian + "\"");
 366         }
 367
 368         (t=i).toLower("de");
 369         if(t!=iDefault) {
 370             errln("error in i.toLower(de)=\"" + t + "\" expected \"" + iDefault + "\"");
 371         }
 372     }
 373
 374 #endif
 375
 376     // test case folding
 377     {
 378         UnicodeString
 379             s=UnicodeString("A\\u00df\\u00b5\\ufb03\\U0001040c\\u0130\\u0131", "").unescape(),
 380             f=UnicodeString("ass\\u03bcffi\\U00010434i\\u0307\\u0131", "").unescape(),
 381             g=UnicodeString("ass\\u03bcffi\\U00010434i\\u0131", "").unescape(),
 382             t;
 383
 384         (t=s).foldCase();
 385         if(f!=t) {
 386             errln("error in foldCase(\"" + s + "\", default)=\"" + t + "\" but expected \"" + f + "\"");
 387         }
 388
 389         // alternate handling for dotted I/dotless i (U+0130, U+0131)
 390         (t=s).foldCase(U_FOLD_CASE_EXCLUDE_SPECIAL_I);
 391         if(g!=t) {
 392             errln("error in foldCase(\"" + s + "\", U_FOLD_CASE_EXCLUDE_SPECIAL_I)=\"" + t + "\" but expected \"" + g + "\"");
 393         }
 394     }
 395 }
 396
 397 // data-driven case mapping tests ------------------------------------------ ***
 398
 399 enum {
 400     TEST_LOWER,
 401     TEST_UPPER,
 402     TEST_TITLE,
 403     TEST_FOLD,
 404     TEST_COUNT
 405 };
 406
 407 // names of TestData children in casing.txt
 408 static const char *const dataNames[TEST_COUNT+1]={
 409     "lowercasing",
 410     "uppercasing",
 411     "titlecasing",
 412     "casefolding",
 413     ""
 414 };
 415
 416 void
 417 StringCaseTest::TestCasingImpl(const UnicodeString &input,
 418                                const UnicodeString &output,
 419                                int32_t whichCase,
 420                                void *iter, const char *localeID, uint32_t options) {
 421     // UnicodeString
 422     UnicodeString result;
 423     const char *name;
 424     Locale locale(localeID);
 425
 426     result=input;
 427     switch(whichCase) {
 428     case TEST_LOWER:
 429         name="toLower";
 430         result.toLower(locale);
 431         break;
 432     case TEST_UPPER:
 433         name="toUpper";
 434         result.toUpper(locale);
 435         break;
 436 #if !UCONFIG_NO_BREAK_ITERATION
 437     case TEST_TITLE:
 438         name="toTitle";
 439         result.toTitle((BreakIterator *)iter, locale, options);
 440         break;
 441 #endif
 442     case TEST_FOLD:
 443         name="foldCase";
 444         result.foldCase(options);
 445         break;
 446     default:
 447         name="";
 448         break; // won't happen
 449     }
 450     if(result!=output) {
 451         dataerrln("error: UnicodeString.%s() got a wrong result for a test case from casing.res", name);
 452     }
 453 #if !UCONFIG_NO_BREAK_ITERATION
 454     if(whichCase==TEST_TITLE && options==0) {
 455         result=input;
 456         result.toTitle((BreakIterator *)iter, locale);
 457         if(result!=output) {
 458             dataerrln("error: UnicodeString.toTitle(options=0) got a wrong result for a test case from casing.res");
 459         }
 460     }
 461 #endif
 462
 463     // UTF-8
 464     char utf8In[100], utf8Out[100];
 465     int32_t utf8InLength, utf8OutLength, resultLength;
 466     UChar *buffer;
 467
 468     IcuTestErrorCode errorCode(*this, "TestCasingImpl");
 469     LocalUCaseMapPointer csm(ucasemap_open(localeID, options, errorCode));
 470 #if !UCONFIG_NO_BREAK_ITERATION
 471     if(iter!=NULL) {
 472         // Clone the break iterator so that the UCaseMap can safely adopt it.
 473         UBreakIterator *clone=ubrk_safeClone((UBreakIterator *)iter, NULL, NULL, errorCode);
 474         ucasemap_setBreakIterator(csm.getAlias(), clone, errorCode);
 475     }
 476 #endif
 477
 478     u_strToUTF8(utf8In, (int32_t)sizeof(utf8In), &utf8InLength, input.getBuffer(), input.length(), errorCode);
 479     switch(whichCase) {
 480     case TEST_LOWER:
 481         name="ucasemap_utf8ToLower";
 482         utf8OutLength=ucasemap_utf8ToLower(csm.getAlias(),
 483                     utf8Out, (int32_t)sizeof(utf8Out),
 484                     utf8In, utf8InLength, errorCode);
 485         break;
 486     case TEST_UPPER:
 487         name="ucasemap_utf8ToUpper";
 488         utf8OutLength=ucasemap_utf8ToUpper(csm.getAlias(),
 489                     utf8Out, (int32_t)sizeof(utf8Out),
 490                     utf8In, utf8InLength, errorCode);
 491         break;
 492 #if !UCONFIG_NO_BREAK_ITERATION
 493     case TEST_TITLE:
 494         name="ucasemap_utf8ToTitle";
 495         utf8OutLength=ucasemap_utf8ToTitle(csm.getAlias(),
 496                     utf8Out, (int32_t)sizeof(utf8Out),
 497                     utf8In, utf8InLength, errorCode);
 498         break;
 499 #endif
 500     case TEST_FOLD:
 501         name="ucasemap_utf8FoldCase";
 502         utf8OutLength=ucasemap_utf8FoldCase(csm.getAlias(),
 503                     utf8Out, (int32_t)sizeof(utf8Out),
 504                     utf8In, utf8InLength, errorCode);
 505         break;
 506     default:
 507         name="";
 508         utf8OutLength=0;
 509         break; // won't happen
 510     }
 511     buffer=result.getBuffer(utf8OutLength);
 512     u_strFromUTF8(buffer, result.getCapacity(), &resultLength, utf8Out, utf8OutLength, errorCode);
 513     result.releaseBuffer(errorCode.isSuccess() ? resultLength : 0);
 514
 515     if(errorCode.isFailure()) {
 516         errcheckln(errorCode, "error: %s() got an error for a test case from casing.res - %s", name, u_errorName(errorCode));
 517         errorCode.reset();
 518     } else if(result!=output) {
 519         errln("error: %s() got a wrong result for a test case from casing.res", name);
 520         errln("expected \"" + output + "\" got \"" + result + "\"" );
 521     }
 522 }
 523
 524 void
 525 StringCaseTest::TestCasing() {
 526     UErrorCode status = U_ZERO_ERROR;
 527 #if !UCONFIG_NO_BREAK_ITERATION
 528     LocalUBreakIteratorPointer iter;
 529 #endif
 530     char cLocaleID[100];
 531     UnicodeString locale, input, output, optionsString, result;
 532     uint32_t options;
 533     int32_t whichCase, type;
 534     LocalPointer<TestDataModule> driver(TestDataModule::getTestDataModule("casing", *this, status));
 535     if(U_SUCCESS(status)) {
 536         for(whichCase=0; whichCase<TEST_COUNT; ++whichCase) {
 537 #if UCONFIG_NO_BREAK_ITERATION
 538             if(whichCase==TEST_TITLE) {
 539                 continue;
 540             }
 541 #endif
 542             LocalPointer<TestData> casingTest(driver->createTestData(dataNames[whichCase], status));
 543             if(U_FAILURE(status)) {
 544                 errln("TestCasing failed to createTestData(%s) - %s", dataNames[whichCase], u_errorName(status));
 545                 break;
 546             }
 547             const DataMap *myCase = NULL;
 548             while(casingTest->nextCase(myCase, status)) {
 549                 input = myCase->getString("Input", status);
 550                 output = myCase->getString("Output", status);
 551
 552                 if(whichCase!=TEST_FOLD) {
 553                     locale = myCase->getString("Locale", status);
 554                 }
 555                 locale.extract(0, 0x7fffffff, cLocaleID, sizeof(cLocaleID), "");
 556
 557 #if !UCONFIG_NO_BREAK_ITERATION
 558                 if(whichCase==TEST_TITLE) {
 559                     type = myCase->getInt("Type", status);
 560                     if(type>=0) {
 561                         iter.adoptInstead(ubrk_open((UBreakIteratorType)type, cLocaleID, NULL, 0, &status));
 562                     } else if(type==-2) {
 563                         // Open a trivial break iterator that only delivers { 0, length }
 564                         // or even just { 0 } as boundaries.
 565                         static const UChar rules[] = { 0x2e, 0x2a, 0x3b };  // ".*;"
 566                         UParseError parseError;
 567                         iter.adoptInstead(ubrk_openRules(rules, UPRV_LENGTHOF(rules), NULL, 0, &parseError, &status));
 568                     }
 569                 }
 570 #endif
 571                 options = 0;
 572                 if(whichCase==TEST_TITLE || whichCase==TEST_FOLD) {
 573                     optionsString = myCase->getString("Options", status);
 574                     if(optionsString.indexOf((UChar)0x54)>=0) {  // T
 575                         options|=U_FOLD_CASE_EXCLUDE_SPECIAL_I;
 576                     }
 577                     if(optionsString.indexOf((UChar)0x4c)>=0) {  // L
 578                         options|=U_TITLECASE_NO_LOWERCASE;
 579                     }
 580                     if(optionsString.indexOf((UChar)0x41)>=0) {  // A
 581                         options|=U_TITLECASE_NO_BREAK_ADJUSTMENT;
 582                     }
 583                 }
 584
 585                 if(U_FAILURE(status)) {
 586                     dataerrln("error: TestCasing() setup failed for %s test case from casing.res: %s", dataNames[whichCase],  u_errorName(status));
 587                     status = U_ZERO_ERROR;
 588                 } else {
 589 #if UCONFIG_NO_BREAK_ITERATION
 590                     LocalPointer<UMemory> iter;
 591 #endif
 592                     TestCasingImpl(input, output, whichCase, iter.getAlias(), cLocaleID, options);
 593                 }
 594
 595 #if !UCONFIG_NO_BREAK_ITERATION
 596                 iter.adoptInstead(NULL);
 597 #endif
 598             }
 599         }
 600     }
 601
 602 #if !UCONFIG_NO_BREAK_ITERATION
 603     // more tests for API coverage
 604     status=U_ZERO_ERROR;
 605     input=UNICODE_STRING_SIMPLE("sTrA\\u00dfE").unescape();
 606     (result=input).toTitle(NULL);
 607     if(result!=UNICODE_STRING_SIMPLE("Stra\\u00dfe").unescape()) {
 608         dataerrln("UnicodeString::toTitle(NULL) failed.");
 609     }
 610 #endif
 611 }
 612
 613 void
 614 StringCaseTest::TestTitleOptions() {
 615     // New options in ICU 60.
 616     TestCasingImpl(u"ʻcAt! ʻeTc.", u"ʻCat! ʻetc.", TEST_TITLE,
 617                    nullptr, "", U_TITLECASE_WHOLE_STRING);
 618     TestCasingImpl(u"a ʻCaT. A ʻdOg! ʻeTc.", u"A ʻCaT. A ʻdOg! ʻETc.", TEST_TITLE,
 619                    nullptr, "", U_TITLECASE_SENTENCES|U_TITLECASE_NO_LOWERCASE);
 620     TestCasingImpl(u"49eRs", u"49ers", TEST_TITLE,
 621                    nullptr, "", U_TITLECASE_WHOLE_STRING);
 622     TestCasingImpl(u"«丰(aBc)»", u"«丰(abc)»", TEST_TITLE,
 623                    nullptr, "", U_TITLECASE_WHOLE_STRING);
 624     TestCasingImpl(u"49eRs", u"49Ers", TEST_TITLE,
 625                    nullptr, "", U_TITLECASE_WHOLE_STRING|U_TITLECASE_ADJUST_TO_CASED);
 626     TestCasingImpl(u"«丰(aBc)»", u"«丰(Abc)»", TEST_TITLE,
 627                    nullptr, "", U_TITLECASE_WHOLE_STRING|U_TITLECASE_ADJUST_TO_CASED);
 628     TestCasingImpl(u" john. Smith", u" John. Smith", TEST_TITLE,
 629                    nullptr, "", U_TITLECASE_WHOLE_STRING|U_TITLECASE_NO_LOWERCASE);
 630     TestCasingImpl(u" john. Smith", u" john. smith", TEST_TITLE,
 631                    nullptr, "", U_TITLECASE_WHOLE_STRING|U_TITLECASE_NO_BREAK_ADJUSTMENT);
 632     TestCasingImpl(u"«ijs»", u"«IJs»", TEST_TITLE,
 633                    nullptr, "nl-BE", U_TITLECASE_WHOLE_STRING);
 634     TestCasingImpl(u"«ijs»", u"«İjs»", TEST_TITLE,
 635                    nullptr, "tr-DE", U_TITLECASE_WHOLE_STRING);
 636
 637 #if !UCONFIG_NO_BREAK_ITERATION
 638     // Test conflicting settings.
 639     // If & when we add more options, then the ORed combinations may become
 640     // indistinguishable from valid values.
 641     IcuTestErrorCode errorCode(*this, "TestTitleOptions");
 642     CaseMap::toTitle("", U_TITLECASE_NO_BREAK_ADJUSTMENT|U_TITLECASE_ADJUST_TO_CASED, nullptr,
 643                      u"", 0, nullptr, 0, nullptr, errorCode);
 644     if (errorCode.get() != U_ILLEGAL_ARGUMENT_ERROR) {
 645         errln("CaseMap::toTitle(multiple adjustment options) -> %s not illegal argument",
 646               errorCode.errorName());
 647     }
 648     errorCode.reset();
 649     CaseMap::toTitle("", U_TITLECASE_WHOLE_STRING|U_TITLECASE_SENTENCES, nullptr,
 650                      u"", 0, nullptr, 0, nullptr, errorCode);
 651     if (errorCode.get() != U_ILLEGAL_ARGUMENT_ERROR) {
 652         errln("CaseMap::toTitle(multiple iterator options) -> %s not illegal argument",
 653               errorCode.errorName());
 654     }
 655     errorCode.reset();
 656     LocalPointer<BreakIterator> iter(
 657         BreakIterator::createCharacterInstance(Locale::getRoot(), errorCode));
 658     CaseMap::toTitle("", U_TITLECASE_WHOLE_STRING, iter.getAlias(),
 659                      u"", 0, nullptr, 0, nullptr, errorCode);
 660     if (errorCode.get() != U_ILLEGAL_ARGUMENT_ERROR) {
 661         errln("CaseMap::toTitle(iterator option + iterator) -> %s not illegal argument",
 662               errorCode.errorName());
 663     }
 664     errorCode.reset();
 665 #endif
 666 }
 667
 668 void
 669 StringCaseTest::TestFullCaseFoldingIterator() {
 670     UnicodeString ffi=UNICODE_STRING_SIMPLE("ffi");
 671     UnicodeString ss=UNICODE_STRING_SIMPLE("ss");
 672     FullCaseFoldingIterator iter;
 673     int32_t count=0;
 674     int32_t countSpecific=0;
 675     UChar32 c;
 676     UnicodeString full;
 677     while((c=iter.next(full))>=0) {
 678         ++count;
 679         // Check that the full Case_Folding has more than 1 code point.
 680         if(!full.hasMoreChar32Than(0, 0x7fffffff, 1)) {
 681             errln("error: FullCaseFoldingIterator.next()=U+%04lX full Case_Folding has at most 1 code point", (long)c);
 682             continue;
 683         }
 684         // Check that full == Case_Folding(c).
 685         UnicodeString cf(c);
 686         cf.foldCase();
 687         if(full!=cf) {
 688             errln("error: FullCaseFoldingIterator.next()=U+%04lX full Case_Folding != cf(c)", (long)c);
 689             continue;
 690         }
 691         // Spot-check a couple of specific cases.
 692         if((full==ffi && c==0xfb03) || (full==ss && (c==0xdf || c==0x1e9e))) {
 693             ++countSpecific;
 694         }
 695     }
 696     if(countSpecific!=3) {
 697         errln("error: FullCaseFoldingIterator did not yield exactly the expected specific cases");
 698     }
 699     if(count<70) {
 700         errln("error: FullCaseFoldingIterator yielded only %d (cp, full) pairs", (int)count);
 701     }
 702 }
 703
 704 void
 705 StringCaseTest::assertGreekUpper(const char16_t *s, const char16_t *expected) {
 706     UnicodeString s16(s);
 707     UnicodeString expected16(expected);
 708     UnicodeString msg = UnicodeString("UnicodeString::toUpper/Greek(\"") + s16 + "\")";
 709     UnicodeString result16(s16);
 710     result16.toUpper(GREEK_LOCALE_);
 711     assertEquals(msg, expected16, result16);
 712
 713     msg = UnicodeString("u_strToUpper/Greek(\"") + s16 + "\") cap=";
 714     int32_t length = expected16.length();
 715     int32_t capacities[] = {
 716         // Keep in sync with the UTF-8 capacities near the bottom of this function.
 717         0, length / 2, length - 1, length, length + 1
 718     };
 719     for (int32_t i = 0; i < UPRV_LENGTHOF(capacities); ++i) {
 720         int32_t cap = capacities[i];
 721         UChar *dest16 = result16.getBuffer(expected16.length() + 1);
 722         u_memset(dest16, 0x55AA, result16.getCapacity());
 723         UErrorCode errorCode = U_ZERO_ERROR;
 724         length = u_strToUpper(dest16, cap, s16.getBuffer(), s16.length(), "el", &errorCode);
 725         assertEquals(msg + cap, expected16.length(), length);
 726         UErrorCode expectedErrorCode;
 727         if (cap < expected16.length()) {
 728             expectedErrorCode = U_BUFFER_OVERFLOW_ERROR;
 729         } else if (cap == expected16.length()) {
 730             expectedErrorCode = U_STRING_NOT_TERMINATED_WARNING;
 731         } else {
 732             expectedErrorCode = U_ZERO_ERROR;
 733             assertEquals(msg + cap + " NUL", 0, dest16[length]);
 734         }
 735         assertEquals(msg + cap + " errorCode", expectedErrorCode, errorCode);
 736         result16.releaseBuffer(length);
 737         if (cap >= expected16.length()) {
 738             assertEquals(msg + cap, expected16, result16);
 739         }
 740     }
 741
 742     UErrorCode errorCode = U_ZERO_ERROR;
 743     LocalUCaseMapPointer csm(ucasemap_open("el", 0, &errorCode));
 744     assertSuccess("ucasemap_open", errorCode);
 745     std::string s8;
 746     s16.toUTF8String(s8);
 747     msg = UnicodeString("ucasemap_utf8ToUpper/Greek(\"") + s16 + "\")";
 748     char dest8[1000];
 749     length = ucasemap_utf8ToUpper(csm.getAlias(), dest8, UPRV_LENGTHOF(dest8),
 750                                   s8.data(), s8.length(), &errorCode);
 751     assertSuccess("ucasemap_utf8ToUpper", errorCode);
 752     StringPiece result8(dest8, length);
 753     UnicodeString result16From8 = UnicodeString::fromUTF8(result8);
 754     assertEquals(msg, expected16, result16From8);
 755
 756     msg += " cap=";
 757     capacities[1] = length / 2;
 758     capacities[2] = length - 1;
 759     capacities[3] = length;
 760     capacities[4] = length + 1;
 761     char dest8b[1000];
 762     int32_t expected8Length = length;  // Assuming the previous call worked.
 763     for (int32_t i = 0; i < UPRV_LENGTHOF(capacities); ++i) {
 764         int32_t cap = capacities[i];
 765         memset(dest8b, 0x5A, UPRV_LENGTHOF(dest8b));
 766         UErrorCode errorCode = U_ZERO_ERROR;
 767         length = ucasemap_utf8ToUpper(csm.getAlias(), dest8b, cap,
 768                                       s8.data(), s8.length(), &errorCode);
 769         assertEquals(msg + cap, expected8Length, length);
 770         UErrorCode expectedErrorCode;
 771         if (cap < expected8Length) {
 772             expectedErrorCode = U_BUFFER_OVERFLOW_ERROR;
 773         } else if (cap == expected8Length) {
 774             expectedErrorCode = U_STRING_NOT_TERMINATED_WARNING;
 775         } else {
 776             expectedErrorCode = U_ZERO_ERROR;
 777             // Casts to int32_t to avoid matching UBool.
 778             assertEquals(msg + cap + " NUL", (int32_t)0, (int32_t)dest8b[length]);
 779         }
 780         assertEquals(msg + cap + " errorCode", expectedErrorCode, errorCode);
 781         if (cap >= expected8Length) {
 782             assertEquals(msg + cap + " (memcmp)", 0, memcmp(dest8, dest8b, expected8Length));
 783         }
 784     }
 785 }
 786
 787 void
 788 StringCaseTest::TestGreekUpper() {
 789     // http://bugs.icu-project.org/trac/ticket/5456
 790     assertGreekUpper(u"άδικος, κείμενο, ίριδα", u"ΑΔΙΚΟΣ, ΚΕΙΜΕΝΟ, ΙΡΙΔΑ");
 791     // https://bugzilla.mozilla.org/show_bug.cgi?id=307039
 792     // https://bug307039.bmoattachments.org/attachment.cgi?id=194893
 793     assertGreekUpper(u"Πατάτα", u"ΠΑΤΑΤΑ");
 794     assertGreekUpper(u"Αέρας, Μυστήριο, Ωραίο", u"ΑΕΡΑΣ, ΜΥΣΤΗΡΙΟ, ΩΡΑΙΟ");
 795     assertGreekUpper(u"Μαΐου, Πόρος, Ρύθμιση", u"ΜΑΪΟΥ, ΠΟΡΟΣ, ΡΥΘΜΙΣΗ");
 796     assertGreekUpper(u"ΰ, Τηρώ, Μάιος", u"Ϋ, ΤΗΡΩ, ΜΑΪΟΣ");
 797     assertGreekUpper(u"άυλος", u"ΑΫΛΟΣ");
 798     assertGreekUpper(u"ΑΫΛΟΣ", u"ΑΫΛΟΣ");
 799     assertGreekUpper(u"Άκλιτα ρήματα ή άκλιτες μετοχές", u"ΑΚΛΙΤΑ ΡΗΜΑΤΑ Ή ΑΚΛΙΤΕΣ ΜΕΤΟΧΕΣ");
 800     // http://www.unicode.org/udhr/d/udhr_ell_monotonic.html
 801     assertGreekUpper(u"Επειδή η αναγνώριση της αξιοπρέπειας", u"ΕΠΕΙΔΗ Η ΑΝΑΓΝΩΡΙΣΗ ΤΗΣ ΑΞΙΟΠΡΕΠΕΙΑΣ");
 802     assertGreekUpper(u"νομικού ή διεθνούς", u"ΝΟΜΙΚΟΥ Ή ΔΙΕΘΝΟΥΣ");
 803     // http://unicode.org/udhr/d/udhr_ell_polytonic.html
 804     assertGreekUpper(u"Ἐπειδὴ ἡ ἀναγνώριση", u"ΕΠΕΙΔΗ Η ΑΝΑΓΝΩΡΙΣΗ");
 805     assertGreekUpper(u"νομικοῦ ἢ διεθνοῦς", u"ΝΟΜΙΚΟΥ Ή ΔΙΕΘΝΟΥΣ");
 806     // From Google bug report
 807     assertGreekUpper(u"Νέο, Δημιουργία", u"ΝΕΟ, ΔΗΜΙΟΥΡΓΙΑ");
 808     // http://crbug.com/234797
 809     assertGreekUpper(u"Ελάτε να φάτε τα καλύτερα παϊδάκια!", u"ΕΛΑΤΕ ΝΑ ΦΑΤΕ ΤΑ ΚΑΛΥΤΕΡΑ ΠΑΪΔΑΚΙΑ!");
 810     assertGreekUpper(u"Μαΐου, τρόλεϊ", u"ΜΑΪΟΥ, ΤΡΟΛΕΪ");
 811     assertGreekUpper(u"Το ένα ή το άλλο.", u"ΤΟ ΕΝΑ Ή ΤΟ ΑΛΛΟ.");
 812     // http://multilingualtypesetting.co.uk/blog/greek-typesetting-tips/
 813     assertGreekUpper(u"ρωμέικα", u"ΡΩΜΕΪΚΑ");
 814     assertGreekUpper(u"ή.", u"Ή.");
 815 }
 816
 817 void
 818 StringCaseTest::TestLongUpper() {
 819     if (quick) {
 820         logln("not exhaustive mode: skipping this test");
 821         return;
 822     }
 823     // Ticket #12663, crash with an extremely long string where
 824     // U+0390 maps to 0399 0308 0301 so that the result is three times as long
 825     // and overflows an int32_t.
 826     int32_t length = 0x40000004;  // more than 1G UChars
 827     UnicodeString s(length, (UChar32)0x390, length);
 828     UnicodeString result;
 829     UChar *dest = result.getBuffer(length + 1);
 830     if (s.isBogus() || dest == NULL) {
 831         logln("Out of memory, unable to run this test on this machine.");
 832         return;
 833     }
 834     IcuTestErrorCode errorCode(*this, "TestLongUpper");
 835     int32_t destLength = u_strToUpper(dest, result.getCapacity(),
 836                                       s.getBuffer(), s.length(), "", errorCode);
 837     result.releaseBuffer(destLength);
 838     if (errorCode.reset() != U_INDEX_OUTOFBOUNDS_ERROR) {
 839         errln("expected U_INDEX_OUTOFBOUNDS_ERROR, got %s (destLength is undefined, got %ld)",
 840               errorCode.errorName(), (long)destLength);
 841     }
 842 }
 843
 844 void StringCaseTest::TestMalformedUTF8() {
 845     // ticket #12639
 846     IcuTestErrorCode errorCode(*this, "TestMalformedUTF8");
 847     LocalUCaseMapPointer csm(ucasemap_open("en", U_TITLECASE_NO_BREAK_ADJUSTMENT, errorCode));
 848     if (errorCode.isFailure()) {
 849         errln("ucasemap_open(English) failed - %s", errorCode.errorName());
 850         return;
 851     }
 852     char src[1] = { (char)0x85 };  // malformed UTF-8
 853     char dest[3] = { 0, 0, 0 };
 854     int32_t destLength;
 855 #if !UCONFIG_NO_BREAK_ITERATION
 856     destLength = ucasemap_utf8ToTitle(csm.getAlias(), dest, 3, src, 1, errorCode);
 857     if (errorCode.isFailure() || destLength != 1 || dest[0] != src[0]) {
 858         errln("ucasemap_utf8ToTitle(\\x85) failed: %s destLength=%d dest[0]=0x%02x",
 859               errorCode.errorName(), (int)destLength, dest[0]);
 860     }
 861 #endif
 862
 863     errorCode.reset();
 864     dest[0] = 0;
 865     destLength = ucasemap_utf8ToLower(csm.getAlias(), dest, 3, src, 1, errorCode);
 866     if (errorCode.isFailure() || destLength != 1 || dest[0] != src[0]) {
 867         errln("ucasemap_utf8ToLower(\\x85) failed: %s destLength=%d dest[0]=0x%02x",
 868               errorCode.errorName(), (int)destLength, dest[0]);
 869     }
 870
 871     errorCode.reset();
 872     dest[0] = 0;
 873     destLength = ucasemap_utf8ToUpper(csm.getAlias(), dest, 3, src, 1, errorCode);
 874     if (errorCode.isFailure() || destLength != 1 || dest[0] != src[0]) {
 875         errln("ucasemap_utf8ToUpper(\\x85) failed: %s destLength=%d dest[0]=0x%02x",
 876               errorCode.errorName(), (int)destLength, dest[0]);
 877     }
 878
 879     errorCode.reset();
 880     dest[0] = 0;
 881     destLength = ucasemap_utf8FoldCase(csm.getAlias(), dest, 3, src, 1, errorCode);
 882     if (errorCode.isFailure() || destLength != 1 || dest[0] != src[0]) {
 883         errln("ucasemap_utf8FoldCase(\\x85) failed: %s destLength=%d dest[0]=0x%02x",
 884               errorCode.errorName(), (int)destLength, dest[0]);
 885     }
 886 }
 887
 888 void StringCaseTest::TestBufferOverflow() {
 889     // Ticket #12849, incorrect result from Title Case preflight operation,
 890     // when buffer overflow error is expected.
 891     IcuTestErrorCode errorCode(*this, "TestBufferOverflow");
 892     LocalUCaseMapPointer csm(ucasemap_open("en", 0, errorCode));
 893     if (errorCode.isFailure()) {
 894         errln("ucasemap_open(English) failed - %s", errorCode.errorName());
 895         return;
 896     }
 897
 898     UnicodeString data("hello world");
 899     int32_t result;
 900 #if !UCONFIG_NO_BREAK_ITERATION
 901     result = ucasemap_toTitle(csm.getAlias(), NULL, 0, data.getBuffer(), data.length(), errorCode);
 902     if (errorCode.get() != U_BUFFER_OVERFLOW_ERROR || result != data.length()) {
 903         errln("%s:%d ucasemap_toTitle(\"hello world\") failed: "
 904               "expected (U_BUFFER_OVERFLOW_ERROR, %d), got (%s, %d)",
 905               __FILE__, __LINE__, data.length(), errorCode.errorName(), result);
 906     }
 907 #endif
 908     errorCode.reset();
 909
 910     std::string data_utf8;
 911     data.toUTF8String(data_utf8);
 912 #if !UCONFIG_NO_BREAK_ITERATION
 913     result = ucasemap_utf8ToTitle(csm.getAlias(), NULL, 0, data_utf8.c_str(), data_utf8.length(), errorCode);
 914     if (errorCode.get() != U_BUFFER_OVERFLOW_ERROR || result != (int32_t)data_utf8.length()) {
 915         errln("%s:%d ucasemap_toTitle(\"hello world\") failed: "
 916               "expected (U_BUFFER_OVERFLOW_ERROR, %d), got (%s, %d)",
 917               __FILE__, __LINE__, data_utf8.length(), errorCode.errorName(), result);
 918     }
 919 #endif
 920     errorCode.reset();
 921 }
 922
 923 void StringCaseTest::TestEdits() {
 924     IcuTestErrorCode errorCode(*this, "TestEdits");
 925     Edits edits;
 926     assertFalse("new Edits hasChanges", edits.hasChanges());
 927     assertEquals("new Edits numberOfChanges", 0, edits.numberOfChanges());
 928     assertEquals("new Edits", 0, edits.lengthDelta());
 929     edits.addUnchanged(1);  // multiple unchanged ranges are combined
 930     edits.addUnchanged(10000);  // too long, and they are split
 931     edits.addReplace(0, 0);
 932     edits.addUnchanged(2);
 933     assertFalse("unchanged 10003 hasChanges", edits.hasChanges());
 934     assertEquals("unchanged 10003 numberOfChanges", 0, edits.numberOfChanges());
 935     assertEquals("unchanged 10003", 0, edits.lengthDelta());
 936     edits.addReplace(2, 1);  // multiple short equal-lengths edits are compressed
 937     edits.addUnchanged(0);
 938     edits.addReplace(2, 1);
 939     edits.addReplace(2, 1);
 940     edits.addReplace(0, 10);
 941     edits.addReplace(100, 0);
 942     edits.addReplace(3000, 4000);  // variable-length encoding
 943     edits.addReplace(100000, 100000);
 944     assertTrue("some edits hasChanges", edits.hasChanges());
 945     assertEquals("some edits numberOfChanges", 7, edits.numberOfChanges());
 946     assertEquals("some edits", -3 + 10 - 100 + 1000, edits.lengthDelta());
 947     UErrorCode outErrorCode = U_ZERO_ERROR;
 948     assertFalse("edits done: copyErrorTo", edits.copyErrorTo(outErrorCode));
 949
 950     static const EditChange coarseExpectedChanges[] = {
 951             { FALSE, 10003, 10003 },
 952             { TRUE, 103106, 104013 }
 953     };
 954     TestUtility::checkEditsIter(*this, u"coarse",
 955             edits.getCoarseIterator(), edits.getCoarseIterator(),
 956             coarseExpectedChanges, UPRV_LENGTHOF(coarseExpectedChanges), TRUE, errorCode);
 957     TestUtility::checkEditsIter(*this, u"coarse changes",
 958             edits.getCoarseChangesIterator(), edits.getCoarseChangesIterator(),
 959             coarseExpectedChanges, UPRV_LENGTHOF(coarseExpectedChanges), FALSE, errorCode);
 960
 961     static const EditChange fineExpectedChanges[] = {
 962             { FALSE, 10003, 10003 },
 963             { TRUE, 2, 1 },
 964             { TRUE, 2, 1 },
 965             { TRUE, 2, 1 },
 966             { TRUE, 0, 10 },
 967             { TRUE, 100, 0 },
 968             { TRUE, 3000, 4000 },
 969             { TRUE, 100000, 100000 }
 970     };
 971     TestUtility::checkEditsIter(*this, u"fine",
 972             edits.getFineIterator(), edits.getFineIterator(),
 973             fineExpectedChanges, UPRV_LENGTHOF(fineExpectedChanges), TRUE, errorCode);
 974     TestUtility::checkEditsIter(*this, u"fine changes",
 975             edits.getFineChangesIterator(), edits.getFineChangesIterator(),
 976             fineExpectedChanges, UPRV_LENGTHOF(fineExpectedChanges), FALSE, errorCode);
 977
 978     edits.reset();
 979     assertFalse("reset hasChanges", edits.hasChanges());
 980     assertEquals("reset numberOfChanges", 0, edits.numberOfChanges());
 981     assertEquals("reset", 0, edits.lengthDelta());
 982     Edits::Iterator ei = edits.getCoarseChangesIterator();
 983     assertFalse("reset then iterator", ei.next(errorCode));
 984 }
 985
 986 void StringCaseTest::TestCopyMoveEdits() {
 987     IcuTestErrorCode errorCode(*this, "TestCopyMoveEdits");
 988     // Exceed the stack array capacity.
 989     Edits a;
 990     for (int32_t i = 0; i < 250; ++i) {
 991         a.addReplace(i % 10, (i % 10) + 1);
 992     }
 993     assertEquals("a: many edits, length delta", 250, a.lengthDelta());
 994
 995     // copy
 996     Edits b(a);
 997     assertEquals("b: copy of many edits, length delta", 250, b.lengthDelta());
 998     assertEquals("a remains: many edits, length delta", 250, a.lengthDelta());
 999     TestUtility::checkEqualEdits(*this, u"b copy of a", a, b, errorCode);
1000
1001     // assign
1002     Edits c;
1003     c.addUnchanged(99);
1004     c.addReplace(88, 77);
1005     c = b;
1006     assertEquals("c: assigned many edits, length delta", 250, c.lengthDelta());
1007     assertEquals("b remains: many edits, length delta", 250, b.lengthDelta());
1008     TestUtility::checkEqualEdits(*this, u"c = b", b, c, errorCode);
1009
1010     // std::move trouble on these platforms.
1011     // See https://ssl.icu-project.org/trac/ticket/13393
1012 #if !(U_PLATFORM == U_PF_AIX || U_PLATFORM == U_PF_OS390)
1013     // move constructor empties object with heap array
1014     Edits d(std::move(a));
1015     assertEquals("d: move-constructed many edits, length delta", 250, d.lengthDelta());
1016     assertFalse("a moved away: no more hasChanges", a.hasChanges());
1017     TestUtility::checkEqualEdits(*this, u"d() <- a", d, b, errorCode);
1018     Edits empty;
1019     TestUtility::checkEqualEdits(*this, u"a moved away", empty, a, errorCode);
1020
1021     // move assignment empties object with heap array
1022     Edits e;
1023     e.addReplace(0, 1000);
1024     e = std::move(b);
1025     assertEquals("e: move-assigned many edits, length delta", 250, e.lengthDelta());
1026     assertFalse("b moved away: no more hasChanges", b.hasChanges());
1027     TestUtility::checkEqualEdits(*this, u"e <- b", e, c, errorCode);
1028     TestUtility::checkEqualEdits(*this, u"b moved away", empty, b, errorCode);
1029
1030     // Edits::Iterator default constructor.
1031     Edits::Iterator iter;
1032     assertFalse("Edits::Iterator().next()", iter.next(errorCode));
1033     assertSuccess("Edits::Iterator().next()", errorCode);
1034     iter = e.getFineChangesIterator();
1035     assertTrue("iter.next()", iter.next(errorCode));
1036     assertSuccess("iter.next()", errorCode);
1037     assertTrue("iter.hasChange()", iter.hasChange());
1038     assertEquals("iter.newLength()", 1, iter.newLength());
1039 #endif
1040 }
1041
1042 void StringCaseTest::TestEditsFindFwdBwd() {
1043     IcuTestErrorCode errorCode(*this, "TestEditsFindFwdBwd");
1044     // Some users need index mappings to be efficient when they are out of order.
1045     // The most interesting failure case for this test is it taking a very long time.
1046     Edits e;
1047     constexpr int32_t N = 200000;
1048     for (int32_t i = 0; i < N; ++i) {
1049         e.addUnchanged(1);
1050         e.addReplace(3, 1);
1051     }
1052     Edits::Iterator iter = e.getFineIterator();
1053     for (int32_t i = 0; i <= N; i += 2) {
1054         assertEquals("ascending", i * 2, iter.sourceIndexFromDestinationIndex(i, errorCode));
1055         assertEquals("ascending", i * 2 + 1, iter.sourceIndexFromDestinationIndex(i + 1, errorCode));
1056     }
1057     for (int32_t i = N; i >= 0; i -= 2) {
1058         assertEquals("descending", i * 2 + 1, iter.sourceIndexFromDestinationIndex(i + 1, errorCode));
1059         assertEquals("descending", i * 2, iter.sourceIndexFromDestinationIndex(i, errorCode));
1060     }
1061 }
1062
1063 void StringCaseTest::TestMergeEdits() {
1064     // For debugging, set -v to see matching edits up to a failure.
1065     IcuTestErrorCode errorCode(*this, "TestMergeEdits");
1066     Edits ab, bc, ac, expected_ac;
1067
1068     // Simple: Two parallel non-changes.
1069     ab.addUnchanged(2);
1070     bc.addUnchanged(2);
1071     expected_ac.addUnchanged(2);
1072
1073     // Simple: Two aligned changes.
1074     ab.addReplace(3, 2);
1075     bc.addReplace(2, 1);
1076     expected_ac.addReplace(3, 1);
1077
1078     // Unequal non-changes.
1079     ab.addUnchanged(5);
1080     bc.addUnchanged(3);
1081     expected_ac.addUnchanged(3);
1082     // ab ahead by 2
1083
1084     // Overlapping changes accumulate until they share a boundary.
1085     ab.addReplace(4, 3);
1086     bc.addReplace(3, 2);
1087     ab.addReplace(4, 3);
1088     bc.addReplace(3, 2);
1089     ab.addReplace(4, 3);
1090     bc.addReplace(3, 2);
1091     bc.addUnchanged(4);
1092     expected_ac.addReplace(14, 8);
1093     // bc ahead by 2
1094
1095     // Balance out intermediate-string lengths.
1096     ab.addUnchanged(2);
1097     expected_ac.addUnchanged(2);
1098
1099     // Insert something and delete it: Should disappear.
1100     ab.addReplace(0, 5);
1101     ab.addReplace(0, 2);
1102     bc.addReplace(7, 0);
1103
1104     // Parallel change to make a new boundary.
1105     ab.addReplace(1, 2);
1106     bc.addReplace(2, 3);
1107     expected_ac.addReplace(1, 3);
1108
1109     // Multiple ab deletions should remain separate at the boundary.
1110     ab.addReplace(1, 0);
1111     ab.addReplace(2, 0);
1112     ab.addReplace(3, 0);
1113     expected_ac.addReplace(1, 0);
1114     expected_ac.addReplace(2, 0);
1115     expected_ac.addReplace(3, 0);
1116
1117     // Unequal non-changes can be split for another boundary.
1118     ab.addUnchanged(2);
1119     bc.addUnchanged(1);
1120     expected_ac.addUnchanged(1);
1121     // ab ahead by 1
1122
1123     // Multiple bc insertions should create a boundary and remain separate.
1124     bc.addReplace(0, 4);
1125     bc.addReplace(0, 5);
1126     bc.addReplace(0, 6);
1127     expected_ac.addReplace(0, 4);
1128     expected_ac.addReplace(0, 5);
1129     expected_ac.addReplace(0, 6);
1130     // ab ahead by 1
1131
1132     // Multiple ab deletions in the middle of a bc change are merged.
1133     bc.addReplace(2, 2);
1134     // bc ahead by 1
1135     ab.addReplace(1, 0);
1136     ab.addReplace(2, 0);
1137     ab.addReplace(3, 0);
1138     ab.addReplace(4, 1);
1139     expected_ac.addReplace(11, 2);
1140
1141     // Multiple bc insertions in the middle of an ab change are merged.
1142     ab.addReplace(5, 6);
1143     bc.addReplace(3, 3);
1144     // ab ahead by 3
1145     bc.addReplace(0, 4);
1146     bc.addReplace(0, 5);
1147     bc.addReplace(0, 6);
1148     bc.addReplace(3, 7);
1149     expected_ac.addReplace(5, 25);
1150
1151     // Delete around a deletion.
1152     ab.addReplace(4, 4);
1153     ab.addReplace(3, 0);
1154     ab.addUnchanged(2);
1155     bc.addReplace(2, 2);
1156     bc.addReplace(4, 0);
1157     expected_ac.addReplace(9, 2);
1158
1159     // Insert into an insertion.
1160     ab.addReplace(0, 2);
1161     bc.addReplace(1, 1);
1162     bc.addReplace(0, 8);
1163     bc.addUnchanged(4);
1164     expected_ac.addReplace(0, 10);
1165     // bc ahead by 3
1166
1167     // Balance out intermediate-string lengths.
1168     ab.addUnchanged(3);
1169     expected_ac.addUnchanged(3);
1170
1171     // Deletions meet insertions.
1172     // Output order is arbitrary in principle, but we expect insertions first
1173     // and want to keep it that way.
1174     ab.addReplace(2, 0);
1175     ab.addReplace(4, 0);
1176     ab.addReplace(6, 0);
1177     bc.addReplace(0, 1);
1178     bc.addReplace(0, 3);
1179     bc.addReplace(0, 5);
1180     expected_ac.addReplace(0, 1);
1181     expected_ac.addReplace(0, 3);
1182     expected_ac.addReplace(0, 5);
1183     expected_ac.addReplace(2, 0);
1184     expected_ac.addReplace(4, 0);
1185     expected_ac.addReplace(6, 0);
1186
1187     // End with a non-change, so that further edits are never reordered.
1188     ab.addUnchanged(1);
1189     bc.addUnchanged(1);
1190     expected_ac.addUnchanged(1);
1191
1192     ac.mergeAndAppend(ab, bc, errorCode);
1193     assertSuccess("ab+bc", errorCode);
1194     if (!TestUtility::checkEqualEdits(*this, u"ab+bc", expected_ac, ac, errorCode)) {
1195         return;
1196     }
1197
1198     // Append more Edits.
1199     Edits ab2, bc2;
1200     ab2.addUnchanged(5);
1201     bc2.addReplace(1, 2);
1202     bc2.addUnchanged(4);
1203     expected_ac.addReplace(1, 2);
1204     expected_ac.addUnchanged(4);
1205     ac.mergeAndAppend(ab2, bc2, errorCode);
1206     assertSuccess("ab2+bc2", errorCode);
1207     if (!TestUtility::checkEqualEdits(*this, u"ab2+bc2", expected_ac, ac, errorCode)) {
1208         return;
1209     }
1210
1211     // Append empty edits.
1212     Edits empty;
1213     ac.mergeAndAppend(empty, empty, errorCode);
1214     assertSuccess("empty+empty", errorCode);
1215     if (!TestUtility::checkEqualEdits(*this, u"empty+empty", expected_ac, ac, errorCode)) {
1216         return;
1217     }
1218
1219     // Error: Append more edits with mismatched intermediate-string lengths.
1220     Edits mismatch;
1221     mismatch.addReplace(1, 1);
1222     ac.mergeAndAppend(ab2, mismatch, errorCode);
1223     assertEquals("ab2+mismatch", U_ILLEGAL_ARGUMENT_ERROR, errorCode.get());
1224     errorCode.reset();
1225     ac.mergeAndAppend(mismatch, bc2, errorCode);
1226     assertEquals("mismatch+bc2", U_ILLEGAL_ARGUMENT_ERROR, errorCode.get());
1227     errorCode.reset();
1228 }
1229
1230 void StringCaseTest::TestCaseMapWithEdits() {
1231     IcuTestErrorCode errorCode(*this, "TestCaseMapWithEdits");
1232     UChar dest[20];
1233     Edits edits;
1234
1235     int32_t length = CaseMap::toLower("tr", U_OMIT_UNCHANGED_TEXT,
1236                                       u"IstanBul", 8, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1237     assertEquals(u"toLower(IstanBul)", UnicodeString(u"ıb"), UnicodeString(TRUE, dest, length));
1238     static const EditChange lowerExpectedChanges[] = {
1239             { TRUE, 1, 1 },
1240             { FALSE, 4, 4 },
1241             { TRUE, 1, 1 },
1242             { FALSE, 2, 2 }
1243     };
1244     TestUtility::checkEditsIter(*this, u"toLower(IstanBul)",
1245             edits.getFineIterator(), edits.getFineIterator(),
1246             lowerExpectedChanges, UPRV_LENGTHOF(lowerExpectedChanges),
1247             TRUE, errorCode);
1248
1249     edits.reset();
1250     length = CaseMap::toUpper("el", U_OMIT_UNCHANGED_TEXT,
1251                               u"Πατάτα", 6, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1252     assertEquals(u"toUpper(Πατάτα)", UnicodeString(u"ΑΤΑΤΑ"), UnicodeString(TRUE, dest, length));
1253     static const EditChange upperExpectedChanges[] = {
1254             { FALSE, 1, 1 },
1255             { TRUE, 1, 1 },
1256             { TRUE, 1, 1 },
1257             { TRUE, 1, 1 },
1258             { TRUE, 1, 1 },
1259             { TRUE, 1, 1 }
1260     };
1261     TestUtility::checkEditsIter(*this, u"toUpper(Πατάτα)",
1262             edits.getFineIterator(), edits.getFineIterator(),
1263             upperExpectedChanges, UPRV_LENGTHOF(upperExpectedChanges),
1264             TRUE, errorCode);
1265
1266     edits.reset();
1267
1268 #if !UCONFIG_NO_BREAK_ITERATION
1269     length = CaseMap::toTitle("nl",
1270                               U_OMIT_UNCHANGED_TEXT |
1271                               U_TITLECASE_NO_BREAK_ADJUSTMENT |
1272                               U_TITLECASE_NO_LOWERCASE,
1273                               nullptr, u"IjssEL IglOo", 12,
1274                               dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1275     assertEquals(u"toTitle(IjssEL IglOo)", UnicodeString(u"J"), UnicodeString(TRUE, dest, length));
1276     static const EditChange titleExpectedChanges[] = {
1277             { FALSE, 1, 1 },
1278             { TRUE, 1, 1 },
1279             { FALSE, 10, 10 }
1280     };
1281     TestUtility::checkEditsIter(*this, u"toTitle(IjssEL IglOo)",
1282             edits.getFineIterator(), edits.getFineIterator(),
1283             titleExpectedChanges, UPRV_LENGTHOF(titleExpectedChanges),
1284             TRUE, errorCode);
1285 #endif
1286
1287     // No explicit nor automatic edits.reset(). Edits should be appended.
1288     length = CaseMap::fold(U_OMIT_UNCHANGED_TEXT | U_EDITS_NO_RESET | U_FOLD_CASE_EXCLUDE_SPECIAL_I,
1289                            u"IßtanBul", 8, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1290     assertEquals(u"foldCase(IßtanBul)", UnicodeString(u"ıssb"), UnicodeString(TRUE, dest, length));
1291     static const EditChange foldExpectedChanges[] = {
1292 #if !UCONFIG_NO_BREAK_ITERATION
1293             // From titlecasing.
1294             { FALSE, 1, 1 },
1295             { TRUE, 1, 1 },
1296             { FALSE, 10, 10 },
1297 #endif
1298             // From case folding.
1299             { TRUE, 1, 1 },
1300             { TRUE, 1, 2 },
1301             { FALSE, 3, 3 },
1302             { TRUE, 1, 1 },
1303             { FALSE, 2, 2 }
1304     };
1305     TestUtility::checkEditsIter(*this, u"foldCase(no Edits reset, IßtanBul)",
1306             edits.getFineIterator(), edits.getFineIterator(),
1307             foldExpectedChanges, UPRV_LENGTHOF(foldExpectedChanges),
1308             TRUE, errorCode);
1309 }
1310
1311 void StringCaseTest::TestCaseMapUTF8WithEdits() {
1312     IcuTestErrorCode errorCode(*this, "TestCaseMapUTF8WithEdits");
1313     char dest[50];
1314     Edits edits;
1315
1316     int32_t length = CaseMap::utf8ToLower("tr", U_OMIT_UNCHANGED_TEXT,
1317                                           u8"IstanBul", 8, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1318     assertEquals(u"toLower(IstanBul)", UnicodeString(u"ıb"),
1319                  UnicodeString::fromUTF8(StringPiece(dest, length)));
1320     static const EditChange lowerExpectedChanges[] = {
1321             { TRUE, 1, 2 },
1322             { FALSE, 4, 4 },
1323             { TRUE, 1, 1 },
1324             { FALSE, 2, 2 }
1325     };
1326     TestUtility::checkEditsIter(*this, u"toLower(IstanBul)",
1327             edits.getFineIterator(), edits.getFineIterator(),
1328             lowerExpectedChanges, UPRV_LENGTHOF(lowerExpectedChanges),
1329             TRUE, errorCode);
1330
1331     edits.reset();
1332     length = CaseMap::utf8ToUpper("el", U_OMIT_UNCHANGED_TEXT,
1333                                   u8"Πατάτα", 6 * 2, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1334     assertEquals(u"toUpper(Πατάτα)", UnicodeString(u"ΑΤΑΤΑ"),
1335                  UnicodeString::fromUTF8(StringPiece(dest, length)));
1336     static const EditChange upperExpectedChanges[] = {
1337             { FALSE, 2, 2 },
1338             { TRUE, 2, 2 },
1339             { TRUE, 2, 2 },
1340             { TRUE, 2, 2 },
1341             { TRUE, 2, 2 },
1342             { TRUE, 2, 2 }
1343     };
1344     TestUtility::checkEditsIter(*this, u"toUpper(Πατάτα)",
1345             edits.getFineIterator(), edits.getFineIterator(),
1346             upperExpectedChanges, UPRV_LENGTHOF(upperExpectedChanges),
1347             TRUE, errorCode);
1348
1349     edits.reset();
1350 #if !UCONFIG_NO_BREAK_ITERATION
1351     length = CaseMap::utf8ToTitle("nl",
1352                                   U_OMIT_UNCHANGED_TEXT |
1353                                   U_TITLECASE_NO_BREAK_ADJUSTMENT |
1354                                   U_TITLECASE_NO_LOWERCASE,
1355                                   nullptr, u8"IjssEL IglOo", 12,
1356                                   dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1357     assertEquals(u"toTitle(IjssEL IglOo)", UnicodeString(u"J"),
1358                  UnicodeString::fromUTF8(StringPiece(dest, length)));
1359     static const EditChange titleExpectedChanges[] = {
1360             { FALSE, 1, 1 },
1361             { TRUE, 1, 1 },
1362             { FALSE, 10, 10 }
1363     };
1364     TestUtility::checkEditsIter(*this, u"toTitle(IjssEL IglOo)",
1365             edits.getFineIterator(), edits.getFineIterator(),
1366             titleExpectedChanges, UPRV_LENGTHOF(titleExpectedChanges),
1367             TRUE, errorCode);
1368 #endif
1369
1370     // No explicit nor automatic edits.reset(). Edits should be appended.
1371     length = CaseMap::utf8Fold(U_OMIT_UNCHANGED_TEXT | U_EDITS_NO_RESET |
1372                                    U_FOLD_CASE_EXCLUDE_SPECIAL_I,
1373                                u8"IßtanBul", 1 + 2 + 6, dest, UPRV_LENGTHOF(dest), &edits, errorCode);
1374     assertEquals(u"foldCase(IßtanBul)", UnicodeString(u"ıssb"),
1375                  UnicodeString::fromUTF8(StringPiece(dest, length)));
1376     static const EditChange foldExpectedChanges[] = {
1377 #if !UCONFIG_NO_BREAK_ITERATION
1378             // From titlecasing.
1379             { FALSE, 1, 1 },
1380             { TRUE, 1, 1 },
1381             { FALSE, 10, 10 },
1382 #endif
1383             // From case folding.
1384             { TRUE, 1, 2 },
1385             { TRUE, 2, 2 },
1386             { FALSE, 3, 3 },
1387             { TRUE, 1, 1 },
1388             { FALSE, 2, 2 }
1389     };
1390     TestUtility::checkEditsIter(*this, u"foldCase(IßtanBul)",
1391             edits.getFineIterator(), edits.getFineIterator(),
1392             foldExpectedChanges, UPRV_LENGTHOF(foldExpectedChanges),
1393             TRUE, errorCode);
1394 }
1395
1396 void StringCaseTest::TestCaseMapToString() {
1397     // This test function name is parallel with one in UCharacterCaseTest.java.
1398     // It is a bit of a misnomer until we have CaseMap API that writes to
1399     // a UnicodeString, at which point we should change this code here.
1400     IcuTestErrorCode errorCode(*this, "TestCaseMapToString");
1401     UChar dest[20];
1402
1403     // Omit unchanged text.
1404     int32_t length = CaseMap::toLower("tr", U_OMIT_UNCHANGED_TEXT,
1405                                       u"IstanBul", 8, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1406     assertEquals(u"toLower(IstanBul)",
1407                  UnicodeString(u"ıb"), UnicodeString(TRUE, dest, length));
1408     length = CaseMap::toUpper("el", U_OMIT_UNCHANGED_TEXT,
1409                               u"Πατάτα", 6, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1410     assertEquals(u"toUpper(Πατάτα)",
1411                  UnicodeString(u"ΑΤΑΤΑ"), UnicodeString(TRUE, dest, length));
1412 #if !UCONFIG_NO_BREAK_ITERATION
1413     length = CaseMap::toTitle("nl",
1414                               U_OMIT_UNCHANGED_TEXT |
1415                               U_TITLECASE_NO_BREAK_ADJUSTMENT |
1416                               U_TITLECASE_NO_LOWERCASE,
1417                               nullptr, u"IjssEL IglOo", 12,
1418                               dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1419     assertEquals(u"toTitle(IjssEL IglOo)",
1420                  UnicodeString(u"J"), UnicodeString(TRUE, dest, length));
1421 #endif
1422     length = CaseMap::fold(U_OMIT_UNCHANGED_TEXT | U_FOLD_CASE_EXCLUDE_SPECIAL_I,
1423                            u"IßtanBul", 8, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1424     assertEquals(u"foldCase(IßtanBul)",
1425                  UnicodeString(u"ıssb"), UnicodeString(TRUE, dest, length));
1426
1427     // Return the whole result string.
1428     length = CaseMap::toLower("tr", 0,
1429                               u"IstanBul", 8, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1430     assertEquals(u"toLower(IstanBul)",
1431                  UnicodeString(u"ıstanbul"), UnicodeString(TRUE, dest, length));
1432     length = CaseMap::toUpper("el", 0,
1433                               u"Πατάτα", 6, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1434     assertEquals(u"toUpper(Πατάτα)",
1435                  UnicodeString(u"ΠΑΤΑΤΑ"), UnicodeString(TRUE, dest, length));
1436 #if !UCONFIG_NO_BREAK_ITERATION
1437     length = CaseMap::toTitle("nl",
1438                               U_TITLECASE_NO_BREAK_ADJUSTMENT |
1439                               U_TITLECASE_NO_LOWERCASE,
1440                               nullptr, u"IjssEL IglOo", 12,
1441                               dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1442     assertEquals(u"toTitle(IjssEL IglOo)",
1443                  UnicodeString(u"IJssEL IglOo"), UnicodeString(TRUE, dest, length));
1444 #endif
1445     length = CaseMap::fold(U_FOLD_CASE_EXCLUDE_SPECIAL_I,
1446                            u"IßtanBul", 8, dest, UPRV_LENGTHOF(dest), nullptr, errorCode);
1447     assertEquals(u"foldCase(IßtanBul)",
1448                  UnicodeString(u"ısstanbul"), UnicodeString(TRUE, dest, length));
1449 }
1450
1451 void StringCaseTest::TestCaseMapUTF8ToString() {
1452     IcuTestErrorCode errorCode(*this, "TestCaseMapUTF8ToString");
1453     std::string dest;
1454     StringByteSink<std::string> sink(&dest);
1455
1456     // Omit unchanged text.
1457     CaseMap::utf8ToLower("tr", U_OMIT_UNCHANGED_TEXT, u8"IstanBul", sink, nullptr, errorCode);
1458     assertEquals(u"toLower(IstanBul)", UnicodeString(u"ıb"), UnicodeString::fromUTF8(dest));
1459     dest.clear();
1460     CaseMap::utf8ToUpper("el", U_OMIT_UNCHANGED_TEXT, u8"Πατάτα", sink, nullptr, errorCode);
1461     assertEquals(u"toUpper(Πατάτα)", UnicodeString(u"ΑΤΑΤΑ"),
1462                  UnicodeString::fromUTF8(dest));
1463 #if !UCONFIG_NO_BREAK_ITERATION
1464     dest.clear();
1465     CaseMap::utf8ToTitle(
1466         "nl", U_OMIT_UNCHANGED_TEXT | U_TITLECASE_NO_BREAK_ADJUSTMENT | U_TITLECASE_NO_LOWERCASE,
1467         nullptr, u8"IjssEL IglOo", sink, nullptr, errorCode);
1468     assertEquals(u"toTitle(IjssEL IglOo)", UnicodeString(u"J"),
1469                  UnicodeString::fromUTF8(dest));
1470 #endif
1471     dest.clear();
1472     CaseMap::utf8Fold(U_OMIT_UNCHANGED_TEXT | U_FOLD_CASE_EXCLUDE_SPECIAL_I,
1473                       u8"IßtanBul", sink, nullptr, errorCode);
1474     assertEquals(u"foldCase(IßtanBul)", UnicodeString(u"ıssb"),
1475                  UnicodeString::fromUTF8(dest));
1476
1477     // Return the whole result string.
1478     dest.clear();
1479     CaseMap::utf8ToLower("tr", 0, u8"IstanBul", sink, nullptr, errorCode);
1480     assertEquals(u"toLower(IstanBul)", UnicodeString(u"ıstanbul"),
1481                  UnicodeString::fromUTF8(dest));
1482     dest.clear();
1483     CaseMap::utf8ToUpper("el", 0, u8"Πατάτα", sink, nullptr, errorCode);
1484     assertEquals(u"toUpper(Πατάτα)", UnicodeString(u"ΠΑΤΑΤΑ"),
1485                  UnicodeString::fromUTF8(dest));
1486 #if !UCONFIG_NO_BREAK_ITERATION
1487     dest.clear();
1488     CaseMap::utf8ToTitle("nl", U_TITLECASE_NO_BREAK_ADJUSTMENT | U_TITLECASE_NO_LOWERCASE,
1489                          nullptr, u8"IjssEL IglOo", sink, nullptr, errorCode);
1490     assertEquals(u"toTitle(IjssEL IglOo)", UnicodeString(u"IJssEL IglOo"),
1491                  UnicodeString::fromUTF8(dest));
1492 #endif
1493     dest.clear();
1494     CaseMap::utf8Fold(U_FOLD_CASE_EXCLUDE_SPECIAL_I, u8"IßtanBul", sink, nullptr, errorCode);
1495     assertEquals(u"foldCase(IßtanBul)", UnicodeString(u"ısstanbul"),
1496                  UnicodeString::fromUTF8(dest));
1497 }
1498
1499 void StringCaseTest::TestLongUnicodeString() {
1500     // Code coverage for UnicodeString case mapping code handling
1501     // long strings or many changes in a string.
1502     UnicodeString s(TRUE,
1503         (const UChar *)
1504         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF"
1505         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF"
1506         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF"
1507         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF"
1508         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF"
1509         u"aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeF", 6 * 51);
1510     UnicodeString expected(TRUE,
1511         (const UChar *)
1512         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF"
1513         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF"
1514         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF"
1515         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF"
1516         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF"
1517         u"AAAAAAAAAABBBBBBBBBBCCCCCCCCCCDDDDDDDDDDEEEEEEEEEEF", 6 * 51);
1518     s.toUpper(Locale::getRoot());
1519     assertEquals("string length 306", expected, s);
1520 }
1521
1522 #if !UCONFIG_NO_BREAK_ITERATION
1523 void StringCaseTest::TestBug13127() {
1524     // Test case crashed when the bug was present.
1525     const char16_t *s16 = u"日本語";
1526     UnicodeString s(TRUE, s16, -1);
1527     s.toTitle(0, Locale::getEnglish());
1528 }
1529
1530 void StringCaseTest::TestInPlaceTitle() {
1531     // Similar to TestBug13127. u_strToTitle() can modify the buffer in-place.
1532     IcuTestErrorCode errorCode(*this, "TestInPlaceTitle");
1533     char16_t s[32] = u"ß ß ß日本語 abcdef";
1534     const char16_t *expected = u"Ss Ss Ss日本語 Abcdef";
1535     int32_t length = u_strToTitle(s, UPRV_LENGTHOF(s), s, -1, nullptr, "", errorCode);
1536     assertEquals("u_strToTitle(in-place) length", u_strlen(expected), length);
1537     assertEquals("u_strToTitle(in-place)", expected, s);
1538 }
1539 #endif
1540
1541 void StringCaseTest::TestCaseMapEditsIteratorDocs() {
1542     IcuTestErrorCode status(*this, "TestCaseMapEditsIteratorDocs");
1543     const char16_t* input = u"abcßDeF";
1544     int32_t inputLength = u_strlen(input);
1545     // output: "abcssdef"
1546
1547     char16_t output[10];
1548     Edits edits;
1549     CaseMap::fold(0, input, -1, output, 10, &edits, status);
1550
1551     static const char16_t* fineIteratorExpected[] = {
1552             u"{ src[0..3] ≡ dest[0..3] (no-change) }",
1553             u"{ src[3..4] ⇝ dest[3..5], repl[0..2] }",
1554             u"{ src[4..5] ⇝ dest[5..6], repl[2..3] }",
1555             u"{ src[5..6] ≡ dest[6..7] (no-change) }",
1556             u"{ src[6..7] ⇝ dest[7..8], repl[3..4] }",
1557     };
1558     static const char16_t* fineChangesIteratorExpected[] = {
1559             u"{ src[3..4] ⇝ dest[3..5], repl[0..2] }",
1560             u"{ src[4..5] ⇝ dest[5..6], repl[2..3] }",
1561             u"{ src[6..7] ⇝ dest[7..8], repl[3..4] }",
1562     };
1563     static const char16_t* coarseIteratorExpected[] = {
1564             u"{ src[0..3] ≡ dest[0..3] (no-change) }",
1565             u"{ src[3..5] ⇝ dest[3..6], repl[0..3] }",
1566             u"{ src[5..6] ≡ dest[6..7] (no-change) }",
1567             u"{ src[6..7] ⇝ dest[7..8], repl[3..4] }",
1568     };
1569     static const char16_t* coarseChangesIteratorExpected[] = {
1570             u"{ src[3..5] ⇝ dest[3..6], repl[0..3] }",
1571             u"{ src[6..7] ⇝ dest[7..8], repl[3..4] }",
1572     };
1573
1574     // Expected destination indices when source index is queried
1575     static int32_t expectedDestFineEditIndices[] = {0, 0, 0, 3, 5, 6, 7};
1576     static int32_t expectedDestCoarseEditIndices[] = {0, 0, 0, 3, 3, 6, 7};
1577     static int32_t expectedDestFineStringIndices[] = {0, 1, 2, 3, 5, 6, 7};
1578     static int32_t expectedDestCoarseStringIndices[] = {0, 1, 2, 3, 6, 6, 7};
1579
1580     // Expected source indices when destination index is queried
1581     static int32_t expectedSrcFineEditIndices[] = { 0, 0, 0, 3, 3, 4, 5, 6 };
1582     static int32_t expectedSrcCoarseEditIndices[] = { 0, 0, 0, 3, 3, 3, 5, 6 };
1583     static int32_t expectedSrcFineStringIndices[] = { 0, 1, 2, 3, 4, 4, 5, 6 };
1584     static int32_t expectedSrcCoarseStringIndices[] = { 0, 1, 2, 3, 5, 5, 5, 6 };
1585
1586     // Demonstrate the iterator next() method:
1587     Edits::Iterator fineIterator = edits.getFineIterator();
1588     int i = 0;
1589     UnicodeString toString;
1590     while (fineIterator.next(status)) {
1591         UnicodeString expected = fineIteratorExpected[i++];
1592         assertEquals(UnicodeString(u"Iteration #") + i,
1593                 expected,
1594                 fineIterator.toString(toString.remove()));
1595     }
1596     Edits::Iterator fineChangesIterator = edits.getFineChangesIterator();
1597     i = 0;
1598     while (fineChangesIterator.next(status)) {
1599         UnicodeString expected = fineChangesIteratorExpected[i++];
1600         assertEquals(UnicodeString(u"Iteration #") + i,
1601                 expected,
1602                 fineChangesIterator.toString(toString.remove()));
1603     }
1604     Edits::Iterator coarseIterator = edits.getCoarseIterator();
1605     i = 0;
1606     while (coarseIterator.next(status)) {
1607         UnicodeString expected = coarseIteratorExpected[i++];
1608         assertEquals(UnicodeString(u"Iteration #") + i,
1609                 expected,
1610                 coarseIterator.toString(toString.remove()));
1611     }
1612     Edits::Iterator coarseChangesIterator = edits.getCoarseChangesIterator();
1613     i = 0;
1614     while (coarseChangesIterator.next(status)) {
1615         UnicodeString expected = coarseChangesIteratorExpected[i++];
1616         assertEquals(UnicodeString(u"Iteration #") + i,
1617                 expected,
1618                 coarseChangesIterator.toString(toString.remove()));
1619     }
1620
1621     // Demonstrate the iterator indexing methods:
1622     // fineIterator should have the same behavior as fineChangesIterator, and
1623     // coarseIterator should have the same behavior as coarseChangesIterator.
1624     for (int32_t srcIndex=0; srcIndex<inputLength; srcIndex++) {
1625         fineIterator.findSourceIndex(srcIndex, status);
1626         fineChangesIterator.findSourceIndex(srcIndex, status);
1627         coarseIterator.findSourceIndex(srcIndex, status);
1628         coarseChangesIterator.findSourceIndex(srcIndex, status);
1629
1630         assertEquals(UnicodeString("Source index: ") + srcIndex,
1631                 expectedDestFineEditIndices[srcIndex],
1632                 fineIterator.destinationIndex());
1633         assertEquals(UnicodeString("Source index: ") + srcIndex,
1634                 expectedDestFineEditIndices[srcIndex],
1635                 fineChangesIterator.destinationIndex());
1636         assertEquals(UnicodeString("Source index: ") + srcIndex,
1637                 expectedDestCoarseEditIndices[srcIndex],
1638                 coarseIterator.destinationIndex());
1639         assertEquals(UnicodeString("Source index: ") + srcIndex,
1640                 expectedDestCoarseEditIndices[srcIndex],
1641                 coarseChangesIterator.destinationIndex());
1642
1643         assertEquals(UnicodeString("Source index: ") + srcIndex,
1644                 expectedDestFineStringIndices[srcIndex],
1645                 fineIterator.destinationIndexFromSourceIndex(srcIndex, status));
1646         assertEquals(UnicodeString("Source index: ") + srcIndex,
1647                 expectedDestFineStringIndices[srcIndex],
1648                 fineChangesIterator.destinationIndexFromSourceIndex(srcIndex, status));
1649         assertEquals(UnicodeString("Source index: ") + srcIndex,
1650                 expectedDestCoarseStringIndices[srcIndex],
1651                 coarseIterator.destinationIndexFromSourceIndex(srcIndex, status));
1652         assertEquals(UnicodeString("Source index: ") + srcIndex,
1653                 expectedDestCoarseStringIndices[srcIndex],
1654                 coarseChangesIterator.destinationIndexFromSourceIndex(srcIndex, status));
1655     }
1656     for (int32_t destIndex=0; destIndex<inputLength; destIndex++) {
1657         fineIterator.findDestinationIndex(destIndex, status);
1658         fineChangesIterator.findDestinationIndex(destIndex, status);
1659         coarseIterator.findDestinationIndex(destIndex, status);
1660         coarseChangesIterator.findDestinationIndex(destIndex, status);
1661
1662         assertEquals(UnicodeString("Destination index: ") + destIndex,
1663                 expectedSrcFineEditIndices[destIndex],
1664                 fineIterator.sourceIndex());
1665         assertEquals(UnicodeString("Destination index: ") + destIndex,
1666                 expectedSrcFineEditIndices[destIndex],
1667                 fineChangesIterator.sourceIndex());
1668         assertEquals(UnicodeString("Destination index: ") + destIndex,
1669                 expectedSrcCoarseEditIndices[destIndex],
1670                 coarseIterator.sourceIndex());
1671         assertEquals(UnicodeString("Destination index: ") + destIndex,
1672                 expectedSrcCoarseEditIndices[destIndex],
1673                 coarseChangesIterator.sourceIndex());
1674
1675         assertEquals(UnicodeString("Destination index: ") + destIndex,
1676                 expectedSrcFineStringIndices[destIndex],
1677                 fineIterator.sourceIndexFromDestinationIndex(destIndex, status));
1678         assertEquals(UnicodeString("Destination index: ") + destIndex,
1679                 expectedSrcFineStringIndices[destIndex],
1680                 fineChangesIterator.sourceIndexFromDestinationIndex(destIndex, status));
1681         assertEquals(UnicodeString("Destination index: ") + destIndex,
1682                 expectedSrcCoarseStringIndices[destIndex],
1683                 coarseIterator.sourceIndexFromDestinationIndex(destIndex, status));
1684         assertEquals(UnicodeString("Destination index: ") + destIndex,
1685                 expectedSrcCoarseStringIndices[destIndex],
1686                 coarseChangesIterator.sourceIndexFromDestinationIndex(destIndex, status));
1687     }
1688 }
1689
1690 void StringCaseTest::TestCaseMapGreekExtended() {
1691     // Ticket 13851
1692     UnicodeString s(u"\u1F80\u1F88\u1FFC");
1693     UnicodeString result(s);
1694     result.toLower(Locale::getRoot());
1695     assertEquals(u"lower", u"\u1F80\u1F80\u1FF3", result);
1696 #if !UCONFIG_NO_BREAK_ITERATION
1697     result = s;
1698     result.toTitle(nullptr, Locale::getRoot());
1699     assertEquals(u"title", u"\u1F88\u1F80\u1FF3", result);
1700 #endif
1701 }
1702
1703 //#endif