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      1 // Copyright (C) 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 *******************************************************************************
      5 * Copyright (C) 2007-2014, International Business Machines Corporation and
      6 * others. All Rights Reserved.
      7 ********************************************************************************
      8 
      9 * File PLURRULTS.cpp
     10 *
     11 ********************************************************************************
     12 */
     13 
     14 #include "unicode/utypes.h"
     15 
     16 #if !UCONFIG_NO_FORMATTING
     17 
     18 #include <stdlib.h>
     19 #include <stdarg.h>
     20 #include <string.h>
     21 
     22 #include "unicode/localpointer.h"
     23 #include "unicode/plurrule.h"
     24 #include "unicode/stringpiece.h"
     25 
     26 #include "cmemory.h"
     27 #include "digitlst.h"
     28 #include "plurrule_impl.h"
     29 #include "plurults.h"
     30 #include "uhash.h"
     31 
     32 void setupResult(const int32_t testSource[], char result[], int32_t* max);
     33 UBool checkEqual(const PluralRules &test, char *result, int32_t max);
     34 UBool testEquality(const PluralRules &test);
     35 
     36 // This is an API test, not a unit test.  It doesn't test very many cases, and doesn't
     37 // try to test the full functionality.  It just calls each function in the class and
     38 // verifies that it works on a basic level.
     39 
     40 void PluralRulesTest::runIndexedTest( int32_t index, UBool exec, const char* &name, char* /*par*/ )
     41 {
     42     if (exec) logln("TestSuite PluralRulesAPI");
     43     TESTCASE_AUTO_BEGIN;
     44     TESTCASE_AUTO(testAPI);
     45     // TESTCASE_AUTO(testGetUniqueKeywordValue);
     46     TESTCASE_AUTO(testGetSamples);
     47     TESTCASE_AUTO(testWithin);
     48     TESTCASE_AUTO(testGetAllKeywordValues);
     49     TESTCASE_AUTO(testOrdinal);
     50     TESTCASE_AUTO(testSelect);
     51     TESTCASE_AUTO(testAvailbleLocales);
     52     TESTCASE_AUTO(testParseErrors);
     53     TESTCASE_AUTO(testFixedDecimal);
     54     TESTCASE_AUTO_END;
     55 }
     56 
     57 
     58 // Quick and dirty class for putting UnicodeStrings in char * messages.
     59 //   TODO: something like this should be generally available.
     60 class US {
     61   private:
     62     char *buf;
     63   public:
     64     US(const UnicodeString &us) {
     65        int32_t bufLen = us.extract((int32_t)0, us.length(), (char *)NULL, (uint32_t)0) + 1;
     66        buf = (char *)uprv_malloc(bufLen);
     67        us.extract(0, us.length(), buf, bufLen); };
     68     const char *cstr() {return buf;};
     69     ~US() { uprv_free(buf);};
     70 };
     71 
     72 
     73 
     74 
     75 
     76 #define PLURAL_TEST_NUM    18
     77 /**
     78  * Test various generic API methods of PluralRules for API coverage.
     79  */
     80 void PluralRulesTest::testAPI(/*char *par*/)
     81 {
     82     UnicodeString pluralTestData[PLURAL_TEST_NUM] = {
     83             UNICODE_STRING_SIMPLE("a: n is 1"),
     84             UNICODE_STRING_SIMPLE("a: n mod 10 is 2"),
     85             UNICODE_STRING_SIMPLE("a: n is not 1"),
     86             UNICODE_STRING_SIMPLE("a: n mod 3 is not 1"),
     87             UNICODE_STRING_SIMPLE("a: n in 2..5"),
     88             UNICODE_STRING_SIMPLE("a: n within 2..5"),
     89             UNICODE_STRING_SIMPLE("a: n not in 2..5"),
     90             UNICODE_STRING_SIMPLE("a: n not within 2..5"),
     91             UNICODE_STRING_SIMPLE("a: n mod 10 in 2..5"),
     92             UNICODE_STRING_SIMPLE("a: n mod 10 within 2..5"),
     93             UNICODE_STRING_SIMPLE("a: n mod 10 is 2 and n is not 12"),
     94             UNICODE_STRING_SIMPLE("a: n mod 10 in 2..3 or n mod 10 is 5"),
     95             UNICODE_STRING_SIMPLE("a: n mod 10 within 2..3 or n mod 10 is 5"),
     96             UNICODE_STRING_SIMPLE("a: n is 1 or n is 4 or n is 23"),
     97             UNICODE_STRING_SIMPLE("a: n mod 2 is 1 and n is not 3 and n in 1..11"),
     98             UNICODE_STRING_SIMPLE("a: n mod 2 is 1 and n is not 3 and n within 1..11"),
     99             UNICODE_STRING_SIMPLE("a: n mod 2 is 1 or n mod 5 is 1 and n is not 6"),
    100             "",
    101     };
    102     static const int32_t pluralTestResult[PLURAL_TEST_NUM][30] = {
    103         {1, 0},
    104         {2,12,22, 0},
    105         {0,2,3,4,5,0},
    106         {0,2,3,5,6,8,9,0},
    107         {2,3,4,5,0},
    108         {2,3,4,5,0},
    109         {0,1,6,7,8, 0},
    110         {0,1,6,7,8, 0},
    111         {2,3,4,5,12,13,14,15,22,23,24,25,0},
    112         {2,3,4,5,12,13,14,15,22,23,24,25,0},
    113         {2,22,32,42,0},
    114         {2,3,5,12,13,15,22,23,25,0},
    115         {2,3,5,12,13,15,22,23,25,0},
    116         {1,4,23,0},
    117         {1,5,7,9,11,0},
    118         {1,5,7,9,11,0},
    119         {1,3,5,7,9,11,13,15,16,0},
    120     };
    121     UErrorCode status = U_ZERO_ERROR;
    122 
    123     // ======= Test constructors
    124     logln("Testing PluralRules constructors");
    125 
    126 
    127     logln("\n start default locale test case ..\n");
    128 
    129     PluralRules defRule(status);
    130     LocalPointer<PluralRules> test(new PluralRules(status), status);
    131     if(U_FAILURE(status)) {
    132         dataerrln("ERROR: Could not create PluralRules (default) - exitting");
    133         return;
    134     }
    135     LocalPointer<PluralRules> newEnPlural(test->forLocale(Locale::getEnglish(), status), status);
    136     if(U_FAILURE(status)) {
    137         dataerrln("ERROR: Could not create PluralRules (English) - exitting");
    138         return;
    139     }
    140 
    141     // ======= Test clone, assignment operator && == operator.
    142     LocalPointer<PluralRules> dupRule(defRule.clone());
    143     if (dupRule==NULL) {
    144         errln("ERROR: clone plural rules test failed!");
    145         return;
    146     } else {
    147         if ( *dupRule != defRule ) {
    148             errln("ERROR:  clone plural rules test failed!");
    149         }
    150     }
    151     *dupRule = *newEnPlural;
    152     if (dupRule!=NULL) {
    153         if ( *dupRule != *newEnPlural ) {
    154             errln("ERROR:  clone plural rules test failed!");
    155         }
    156     }
    157 
    158     // ======= Test empty plural rules
    159     logln("Testing Simple PluralRules");
    160 
    161     LocalPointer<PluralRules> empRule(test->createRules(UNICODE_STRING_SIMPLE("a:n"), status));
    162     UnicodeString key;
    163     for (int32_t i=0; i<10; ++i) {
    164         key = empRule->select(i);
    165         if ( key.charAt(0)!= 0x61 ) { // 'a'
    166             errln("ERROR:  empty plural rules test failed! - exitting");
    167         }
    168     }
    169 
    170     // ======= Test simple plural rules
    171     logln("Testing Simple PluralRules");
    172 
    173     char result[100];
    174     int32_t max;
    175 
    176     for (int32_t i=0; i<PLURAL_TEST_NUM-1; ++i) {
    177        LocalPointer<PluralRules> newRules(test->createRules(pluralTestData[i], status));
    178        setupResult(pluralTestResult[i], result, &max);
    179        if ( !checkEqual(*newRules, result, max) ) {
    180             errln("ERROR:  simple plural rules failed! - exitting");
    181             return;
    182         }
    183     }
    184 
    185     // ======= Test complex plural rules
    186     logln("Testing Complex PluralRules");
    187     // TODO: the complex test data is hard coded. It's better to implement
    188     // a parser to parse the test data.
    189     UnicodeString complexRule = UNICODE_STRING_SIMPLE("a: n in 2..5; b: n in 5..8; c: n mod 2 is 1");
    190     UnicodeString complexRule2 = UNICODE_STRING_SIMPLE("a: n within 2..5; b: n within 5..8; c: n mod 2 is 1");
    191     char cRuleResult[] =
    192     {
    193        0x6F, // 'o'
    194        0x63, // 'c'
    195        0x61, // 'a'
    196        0x61, // 'a'
    197        0x61, // 'a'
    198        0x61, // 'a'
    199        0x62, // 'b'
    200        0x62, // 'b'
    201        0x62, // 'b'
    202        0x63, // 'c'
    203        0x6F, // 'o'
    204        0x63  // 'c'
    205     };
    206     LocalPointer<PluralRules> newRules(test->createRules(complexRule, status));
    207     if ( !checkEqual(*newRules, cRuleResult, 12) ) {
    208          errln("ERROR:  complex plural rules failed! - exitting");
    209          return;
    210     }
    211     newRules.adoptInstead(test->createRules(complexRule2, status));
    212     if ( !checkEqual(*newRules, cRuleResult, 12) ) {
    213          errln("ERROR:  complex plural rules failed! - exitting");
    214          return;
    215     }
    216 
    217     // ======= Test decimal fractions plural rules
    218     UnicodeString decimalRule= UNICODE_STRING_SIMPLE("a: n not in 0..100;");
    219     UnicodeString KEYWORD_A = UNICODE_STRING_SIMPLE("a");
    220     status = U_ZERO_ERROR;
    221     newRules.adoptInstead(test->createRules(decimalRule, status));
    222     if (U_FAILURE(status)) {
    223         dataerrln("ERROR: Could not create PluralRules for testing fractions - exitting");
    224         return;
    225     }
    226     double fData[] =     {-101, -100, -1,     -0.0,  0,     0.1,  1,     1.999,  2.0,   100,   100.001 };
    227     UBool isKeywordA[] = {TRUE, FALSE, FALSE, FALSE, FALSE, TRUE, FALSE, TRUE,   FALSE, FALSE, TRUE };
    228     for (int32_t i=0; i<UPRV_LENGTHOF(fData); i++) {
    229         if ((newRules->select(fData[i])== KEYWORD_A) != isKeywordA[i]) {
    230              errln("File %s, Line %d, ERROR: plural rules for decimal fractions test failed!\n"
    231                    "  number = %g, expected %s", __FILE__, __LINE__, fData[i], isKeywordA[i]?"TRUE":"FALSE");
    232         }
    233     }
    234 
    235     // ======= Test Equality
    236     logln("Testing Equality of PluralRules");
    237 
    238     if ( !testEquality(*test) ) {
    239          errln("ERROR:  complex plural rules failed! - exitting");
    240          return;
    241      }
    242 
    243 
    244     // ======= Test getStaticClassID()
    245     logln("Testing getStaticClassID()");
    246 
    247     if(test->getDynamicClassID() != PluralRules::getStaticClassID()) {
    248         errln("ERROR: getDynamicClassID() didn't return the expected value");
    249     }
    250     // ====== Test fallback to parent locale
    251     LocalPointer<PluralRules> en_UK(test->forLocale(Locale::getUK(), status));
    252     LocalPointer<PluralRules> en(test->forLocale(Locale::getEnglish(), status));
    253     if (en_UK.isValid() && en.isValid()) {
    254         if ( *en_UK != *en ) {
    255             errln("ERROR:  test locale fallback failed!");
    256         }
    257     }
    258 
    259     LocalPointer<PluralRules> zh_Hant(test->forLocale(Locale::getTaiwan(), status));
    260     LocalPointer<PluralRules> zh(test->forLocale(Locale::getChinese(), status));
    261     if (zh_Hant.isValid() && zh.isValid()) {
    262         if ( *zh_Hant != *zh ) {
    263             errln("ERROR:  test locale fallback failed!");
    264         }
    265     }
    266 }
    267 
    268 void setupResult(const int32_t testSource[], char result[], int32_t* max) {
    269     int32_t i=0;
    270     int32_t curIndex=0;
    271 
    272     do {
    273         while (curIndex < testSource[i]) {
    274             result[curIndex++]=0x6F; //'o' other
    275         }
    276         result[curIndex++]=0x61; // 'a'
    277 
    278     } while(testSource[++i]>0);
    279     *max=curIndex;
    280 }
    281 
    282 
    283 UBool checkEqual(const PluralRules &test, char *result, int32_t max) {
    284     UnicodeString key;
    285     UBool isEqual = TRUE;
    286     for (int32_t i=0; i<max; ++i) {
    287         key= test.select(i);
    288         if ( key.charAt(0)!=result[i] ) {
    289             isEqual = FALSE;
    290         }
    291     }
    292     return isEqual;
    293 }
    294 
    295 
    296 
    297 static const int32_t MAX_EQ_ROW = 2;
    298 static const int32_t MAX_EQ_COL = 5;
    299 UBool testEquality(const PluralRules &test) {
    300     UnicodeString testEquRules[MAX_EQ_ROW][MAX_EQ_COL] = {
    301         {   UNICODE_STRING_SIMPLE("a: n in 2..3"),
    302             UNICODE_STRING_SIMPLE("a: n is 2 or n is 3"),
    303             UNICODE_STRING_SIMPLE( "a:n is 3 and n in 2..5 or n is 2"),
    304             "",
    305         },
    306         {   UNICODE_STRING_SIMPLE("a: n is 12; b:n mod 10 in 2..3"),
    307             UNICODE_STRING_SIMPLE("b: n mod 10 in 2..3 and n is not 12; a: n in 12..12"),
    308             UNICODE_STRING_SIMPLE("b: n is 13; a: n in 12..13; b: n mod 10 is 2 or n mod 10 is 3"),
    309             "",
    310         }
    311     };
    312     UErrorCode status = U_ZERO_ERROR;
    313     UnicodeString key[MAX_EQ_COL];
    314     UBool ret=TRUE;
    315     for (int32_t i=0; i<MAX_EQ_ROW; ++i) {
    316         PluralRules* rules[MAX_EQ_COL];
    317 
    318         for (int32_t j=0; j<MAX_EQ_COL; ++j) {
    319             rules[j]=NULL;
    320         }
    321         int32_t totalRules=0;
    322         while((totalRules<MAX_EQ_COL) && (testEquRules[i][totalRules].length()>0) ) {
    323             rules[totalRules]=test.createRules(testEquRules[i][totalRules], status);
    324             totalRules++;
    325         }
    326         for (int32_t n=0; n<300 && ret ; ++n) {
    327             for(int32_t j=0; j<totalRules;++j) {
    328                 key[j] = rules[j]->select(n);
    329             }
    330             for(int32_t j=0; j<totalRules-1;++j) {
    331                 if (key[j]!=key[j+1]) {
    332                     ret= FALSE;
    333                     break;
    334                 }
    335             }
    336 
    337         }
    338         for (int32_t j=0; j<MAX_EQ_COL; ++j) {
    339             if (rules[j]!=NULL) {
    340                 delete rules[j];
    341             }
    342         }
    343     }
    344 
    345     return ret;
    346 }
    347 
    348 void
    349 PluralRulesTest::assertRuleValue(const UnicodeString& rule, double expected) {
    350   assertRuleKeyValue("a:" + rule, "a", expected);
    351 }
    352 
    353 void
    354 PluralRulesTest::assertRuleKeyValue(const UnicodeString& rule,
    355                                     const UnicodeString& key, double expected) {
    356   UErrorCode status = U_ZERO_ERROR;
    357   PluralRules *pr = PluralRules::createRules(rule, status);
    358   double result = pr->getUniqueKeywordValue(key);
    359   delete pr;
    360   if (expected != result) {
    361     errln("expected %g but got %g", expected, result);
    362   }
    363 }
    364 
    365 // TODO: UniqueKeywordValue() is not currently supported.
    366 //       If it never will be, this test code should be removed.
    367 void PluralRulesTest::testGetUniqueKeywordValue() {
    368   assertRuleValue("n is 1", 1);
    369   assertRuleValue("n in 2..2", 2);
    370   assertRuleValue("n within 2..2", 2);
    371   assertRuleValue("n in 3..4", UPLRULES_NO_UNIQUE_VALUE);
    372   assertRuleValue("n within 3..4", UPLRULES_NO_UNIQUE_VALUE);
    373   assertRuleValue("n is 2 or n is 2", 2);
    374   assertRuleValue("n is 2 and n is 2", 2);
    375   assertRuleValue("n is 2 or n is 3", UPLRULES_NO_UNIQUE_VALUE);
    376   assertRuleValue("n is 2 and n is 3", UPLRULES_NO_UNIQUE_VALUE);
    377   assertRuleValue("n is 2 or n in 2..3", UPLRULES_NO_UNIQUE_VALUE);
    378   assertRuleValue("n is 2 and n in 2..3", 2);
    379   assertRuleKeyValue("a: n is 1", "not_defined", UPLRULES_NO_UNIQUE_VALUE); // key not defined
    380   assertRuleKeyValue("a: n is 1", "other", UPLRULES_NO_UNIQUE_VALUE); // key matches default rule
    381 }
    382 
    383 void PluralRulesTest::testGetSamples() {
    384   // TODO: fix samples, re-enable this test.
    385 
    386   // no get functional equivalent API in ICU4C, so just
    387   // test every locale...
    388   UErrorCode status = U_ZERO_ERROR;
    389   int32_t numLocales;
    390   const Locale* locales = Locale::getAvailableLocales(numLocales);
    391 
    392   double values[1000];
    393   for (int32_t i = 0; U_SUCCESS(status) && i < numLocales; ++i) {
    394     PluralRules *rules = PluralRules::forLocale(locales[i], status);
    395     if (U_FAILURE(status)) {
    396       break;
    397     }
    398     StringEnumeration *keywords = rules->getKeywords(status);
    399     if (U_FAILURE(status)) {
    400       delete rules;
    401       break;
    402     }
    403     const UnicodeString* keyword;
    404     while (NULL != (keyword = keywords->snext(status))) {
    405       int32_t count = rules->getSamples(*keyword, values, UPRV_LENGTHOF(values), status);
    406       if (U_FAILURE(status)) {
    407         errln(UNICODE_STRING_SIMPLE("getSamples() failed for locale ") +
    408               locales[i].getName() +
    409               UNICODE_STRING_SIMPLE(", keyword ") + *keyword);
    410         continue;
    411       }
    412       if (count == 0) {
    413         // TODO: Lots of these.
    414         //   errln(UNICODE_STRING_SIMPLE("no samples for keyword ") + *keyword + UNICODE_STRING_SIMPLE(" in locale ") + locales[i].getName() );
    415       }
    416       if (count > UPRV_LENGTHOF(values)) {
    417         errln(UNICODE_STRING_SIMPLE("getSamples()=") + count +
    418               UNICODE_STRING_SIMPLE(", too many values, for locale ") +
    419               locales[i].getName() +
    420               UNICODE_STRING_SIMPLE(", keyword ") + *keyword);
    421         count = UPRV_LENGTHOF(values);
    422       }
    423       for (int32_t j = 0; j < count; ++j) {
    424         if (values[j] == UPLRULES_NO_UNIQUE_VALUE) {
    425           errln("got 'no unique value' among values");
    426         } else {
    427           UnicodeString resultKeyword = rules->select(values[j]);
    428           // if (strcmp(locales[i].getName(), "uk") == 0) {    // Debug only.
    429           //     std::cout << "  uk " << US(resultKeyword).cstr() << " " << values[j] << std::endl;
    430           // }
    431           if (*keyword != resultKeyword) {
    432             errln("file %s, line %d, Locale %s, sample for keyword \"%s\":  %g, select(%g) returns keyword \"%s\"",
    433                 __FILE__, __LINE__, locales[i].getName(), US(*keyword).cstr(), values[j], values[j], US(resultKeyword).cstr());
    434           }
    435         }
    436       }
    437     }
    438     delete keywords;
    439     delete rules;
    440   }
    441 }
    442 
    443 void PluralRulesTest::testWithin() {
    444   // goes to show you what lack of testing will do.
    445   // of course, this has been broken for two years and no one has noticed...
    446   UErrorCode status = U_ZERO_ERROR;
    447   PluralRules *rules = PluralRules::createRules("a: n mod 10 in 5..8", status);
    448   if (!rules) {
    449     errln("couldn't instantiate rules");
    450     return;
    451   }
    452 
    453   UnicodeString keyword = rules->select((int32_t)26);
    454   if (keyword != "a") {
    455     errln("expected 'a' for 26 but didn't get it.");
    456   }
    457 
    458   keyword = rules->select(26.5);
    459   if (keyword != "other") {
    460     errln("expected 'other' for 26.5 but didn't get it.");
    461   }
    462 
    463   delete rules;
    464 }
    465 
    466 void
    467 PluralRulesTest::testGetAllKeywordValues() {
    468     const char* data[] = {
    469         "a: n in 2..5", "a: 2,3,4,5; other: null; b:",
    470         "a: n not in 2..5", "a: null; other: null",
    471         "a: n within 2..5", "a: null; other: null",
    472         "a: n not within 2..5", "a: null; other: null",
    473         "a: n in 2..5 or n within 6..8", "a: null", // ignore 'other' here on out, always null
    474         "a: n in 2..5 and n within 6..8", "a:",
    475         "a: n in 2..5 and n within 5..8", "a: 5",
    476         "a: n within 2..5 and n within 6..8", "a:", // our sampling catches these
    477         "a: n within 2..5 and n within 5..8", "a: 5", // ''
    478         "a: n within 1..2 and n within 2..3 or n within 3..4 and n within 4..5", "a: 2,4",
    479         "a: n within 1..2 and n within 2..3 or n within 3..4 and n within 4..5 "
    480           "or n within 5..6 and n within 6..7", "a: null", // but not this...
    481         "a: n mod 3 is 0", "a: null",
    482         "a: n mod 3 is 0 and n within 1..2", "a:",
    483         "a: n mod 3 is 0 and n within 0..5", "a: 0,3",
    484         "a: n mod 3 is 0 and n within 0..6", "a: null", // similarly with mod, we don't catch...
    485         "a: n mod 3 is 0 and n in 3..12", "a: 3,6,9,12",
    486         NULL
    487     };
    488 
    489     for (int i = 0; data[i] != NULL; i += 2) {
    490         UErrorCode status = U_ZERO_ERROR;
    491         UnicodeString ruleDescription(data[i], -1, US_INV);
    492         const char* result = data[i+1];
    493 
    494         logln("[%d] %s", i >> 1, data[i]);
    495 
    496         PluralRules *p = PluralRules::createRules(ruleDescription, status);
    497         if (p == NULL || U_FAILURE(status)) {
    498             errln("file %s, line %d: could not create rules from '%s'\n"
    499                   "  ErrorCode: %s\n",
    500                   __FILE__, __LINE__, data[i], u_errorName(status));
    501             continue;
    502         }
    503 
    504         // TODO: fix samples implementation, re-enable test.
    505         (void)result;
    506         #if 0
    507 
    508         const char* rp = result;
    509         while (*rp) {
    510             while (*rp == ' ') ++rp;
    511             if (!rp) {
    512                 break;
    513             }
    514 
    515             const char* ep = rp;
    516             while (*ep && *ep != ':') ++ep;
    517 
    518             status = U_ZERO_ERROR;
    519             UnicodeString keyword(rp, ep - rp, US_INV);
    520             double samples[4]; // no test above should have more samples than 4
    521             int32_t count = p->getAllKeywordValues(keyword, &samples[0], 4, status);
    522             if (U_FAILURE(status)) {
    523                 errln("error getting samples for %s", rp);
    524                 break;
    525             }
    526 
    527             if (count > 4) {
    528               errln("count > 4 for keyword %s", rp);
    529               count = 4;
    530             }
    531 
    532             if (*ep) {
    533                 ++ep; // skip colon
    534                 while (*ep && *ep == ' ') ++ep; // and spaces
    535             }
    536 
    537             UBool ok = TRUE;
    538             if (count == -1) {
    539                 if (*ep != 'n') {
    540                     errln("expected values for keyword %s but got -1 (%s)", rp, ep);
    541                     ok = FALSE;
    542                 }
    543             } else if (*ep == 'n') {
    544                 errln("expected count of -1, got %d, for keyword %s (%s)", count, rp, ep);
    545                 ok = FALSE;
    546             }
    547 
    548             // We'll cheat a bit here.  The samples happend to be in order and so are our
    549             // expected values, so we'll just test in order until a failure.  If the
    550             // implementation changes to return samples in an arbitrary order, this test
    551             // must change.  There's no actual restriction on the order of the samples.
    552 
    553             for (int j = 0; ok && j < count; ++j ) { // we've verified count < 4
    554                 double val = samples[j];
    555                 if (*ep == 0 || *ep == ';') {
    556                     errln("got unexpected value[%d]: %g", j, val);
    557                     ok = FALSE;
    558                     break;
    559                 }
    560                 char* xp;
    561                 double expectedVal = strtod(ep, &xp);
    562                 if (xp == ep) {
    563                     // internal error
    564                     errln("yikes!");
    565                     ok = FALSE;
    566                     break;
    567                 }
    568                 ep = xp;
    569                 if (expectedVal != val) {
    570                     errln("expected %g but got %g", expectedVal, val);
    571                     ok = FALSE;
    572                     break;
    573                 }
    574                 if (*ep == ',') ++ep;
    575             }
    576 
    577             if (ok && count != -1) {
    578                 if (!(*ep == 0 || *ep == ';')) {
    579                     errln("file: %s, line %d, didn't get expected value: %s", __FILE__, __LINE__, ep);
    580                     ok = FALSE;
    581                 }
    582             }
    583 
    584             while (*ep && *ep != ';') ++ep;
    585             if (*ep == ';') ++ep;
    586             rp = ep;
    587         }
    588     #endif
    589     delete p;
    590     }
    591 }
    592 
    593 void PluralRulesTest::testOrdinal() {
    594     IcuTestErrorCode errorCode(*this, "testOrdinal");
    595     LocalPointer<PluralRules> pr(PluralRules::forLocale("en", UPLURAL_TYPE_ORDINAL, errorCode));
    596     if (errorCode.logIfFailureAndReset("PluralRules::forLocale(en, UPLURAL_TYPE_ORDINAL) failed")) {
    597         return;
    598     }
    599     UnicodeString keyword = pr->select(2.);
    600     if (keyword != UNICODE_STRING("two", 3)) {
    601         dataerrln("PluralRules(en-ordinal).select(2) failed");
    602     }
    603 }
    604 
    605 
    606 static const char * END_MARK = "999.999";    // Mark end of varargs data.
    607 
    608 void PluralRulesTest::checkSelect(const LocalPointer<PluralRules> &rules, UErrorCode &status,
    609                                   int32_t line, const char *keyword, ...) {
    610     // The varargs parameters are a const char* strings, each being a decimal number.
    611     //   The formatting of the numbers as strings is significant, e.g.
    612     //     the difference between "2" and "2.0" can affect which rule matches (which keyword is selected).
    613     // Note: rules parameter is a LocalPointer reference rather than a PluralRules * to avoid having
    614     //       to write getAlias() at every (numerous) call site.
    615 
    616     if (U_FAILURE(status)) {
    617         errln("file %s, line %d, ICU error status: %s.", __FILE__, line, u_errorName(status));
    618         status = U_ZERO_ERROR;
    619         return;
    620     }
    621 
    622     if (rules == NULL) {
    623         errln("file %s, line %d: rules pointer is NULL", __FILE__, line);
    624         return;
    625     }
    626 
    627     va_list ap;
    628     va_start(ap, keyword);
    629     for (;;) {
    630         const char *num = va_arg(ap, const char *);
    631         if (strcmp(num, END_MARK) == 0) {
    632             break;
    633         }
    634 
    635         // DigitList is a convenient way to parse the decimal number string and get a double.
    636         DigitList  dl;
    637         dl.set(StringPiece(num), status);
    638         if (U_FAILURE(status)) {
    639             errln("file %s, line %d, ICU error status: %s.", __FILE__, line, u_errorName(status));
    640             status = U_ZERO_ERROR;
    641             continue;
    642         }
    643         double numDbl = dl.getDouble();
    644         const char *decimalPoint = strchr(num, '.');
    645         int fractionDigitCount = decimalPoint == NULL ? 0 : (num + strlen(num) - 1) - decimalPoint;
    646         int fractionDigits = fractionDigitCount == 0 ? 0 : atoi(decimalPoint + 1);
    647         FixedDecimal ni(numDbl, fractionDigitCount, fractionDigits);
    648 
    649         UnicodeString actualKeyword = rules->select(ni);
    650         if (actualKeyword != UnicodeString(keyword)) {
    651             errln("file %s, line %d, select(%s) returned incorrect keyword. Expected %s, got %s",
    652                    __FILE__, line, num, keyword, US(actualKeyword).cstr());
    653         }
    654     }
    655     va_end(ap);
    656 }
    657 
    658 void PluralRulesTest::testSelect() {
    659     UErrorCode status = U_ZERO_ERROR;
    660     LocalPointer<PluralRules> pr(PluralRules::createRules("s: n in 1,3,4,6", status));
    661     checkSelect(pr, status, __LINE__, "s", "1.0", "3.0", "4.0", "6.0", END_MARK);
    662     checkSelect(pr, status, __LINE__, "other", "0.0", "2.0", "3.1", "7.0", END_MARK);
    663 
    664     pr.adoptInstead(PluralRules::createRules("s: n not in 1,3,4,6", status));
    665     checkSelect(pr, status, __LINE__, "other", "1.0", "3.0", "4.0", "6.0", END_MARK);
    666     checkSelect(pr, status, __LINE__, "s", "0.0", "2.0", "3.1", "7.0", END_MARK);
    667 
    668     pr.adoptInstead(PluralRules::createRules("r: n in 1..4, 7..10, 14 .. 17;"
    669                                              "s: n is 29;", status));
    670     checkSelect(pr, status, __LINE__, "r", "1.0", "3.0", "7.0", "8.0", "10.0", "14.0", "17.0", END_MARK);
    671     checkSelect(pr, status, __LINE__, "s", "29.0", END_MARK);
    672     checkSelect(pr, status, __LINE__, "other", "28.0", "29.1", END_MARK);
    673 
    674     pr.adoptInstead(PluralRules::createRules("a: n mod 10 is 1;  b: n mod 100 is 0 ", status));
    675     checkSelect(pr, status, __LINE__, "a", "1", "11", "41", "101", "301.00", END_MARK);
    676     checkSelect(pr, status, __LINE__, "b", "0", "100", "200.0", "300.", "1000", "1100", "110000", END_MARK);
    677     checkSelect(pr, status, __LINE__, "other", "0.01", "1.01", "0.99", "2", "3", "99", "102", END_MARK);
    678 
    679     // Rules that end with or without a ';' and with or without trailing spaces.
    680     //    (There was a rule parser bug here with these.)
    681     pr.adoptInstead(PluralRules::createRules("a: n is 1", status));
    682     checkSelect(pr, status, __LINE__, "a", "1", END_MARK);
    683     checkSelect(pr, status, __LINE__, "other", "2", END_MARK);
    684 
    685     pr.adoptInstead(PluralRules::createRules("a: n is 1 ", status));
    686     checkSelect(pr, status, __LINE__, "a", "1", END_MARK);
    687     checkSelect(pr, status, __LINE__, "other", "2", END_MARK);
    688 
    689     pr.adoptInstead(PluralRules::createRules("a: n is 1;", status));
    690     checkSelect(pr, status, __LINE__, "a", "1", END_MARK);
    691     checkSelect(pr, status, __LINE__, "other", "2", END_MARK);
    692 
    693     pr.adoptInstead(PluralRules::createRules("a: n is 1 ; ", status));
    694     checkSelect(pr, status, __LINE__, "a", "1", END_MARK);
    695     checkSelect(pr, status, __LINE__, "other", "2", END_MARK);
    696 
    697     // First match when rules for different keywords are not disjoint.
    698     //   Also try spacing variations around ':' and '..'
    699     pr.adoptInstead(PluralRules::createRules("c: n in 5..15;  b : n in 1..10 ;a:n in 10 .. 20", status));
    700     checkSelect(pr, status, __LINE__, "a", "20", END_MARK);
    701     checkSelect(pr, status, __LINE__, "b", "1", END_MARK);
    702     checkSelect(pr, status, __LINE__, "c", "10", END_MARK);
    703     checkSelect(pr, status, __LINE__, "other", "0", "21", "10.1", END_MARK);
    704 
    705     // in vs within
    706     pr.adoptInstead(PluralRules::createRules("a: n in 2..10; b: n within 8..15", status));
    707     checkSelect(pr, status, __LINE__, "a", "2", "8", "10", END_MARK);
    708     checkSelect(pr, status, __LINE__, "b", "8.01", "9.5", "11", "14.99", "15", END_MARK);
    709     checkSelect(pr, status, __LINE__, "other", "1", "7.7", "15.01", "16", END_MARK);
    710 
    711     // OR and AND chains.
    712     pr.adoptInstead(PluralRules::createRules("a: n in 2..10 and n in 4..12 and n not in 5..7", status));
    713     checkSelect(pr, status, __LINE__, "a", "4", "8", "9", "10", END_MARK);
    714     checkSelect(pr, status, __LINE__, "other", "2", "3", "5", "7", "11", END_MARK);
    715     pr.adoptInstead(PluralRules::createRules("a: n is 2 or n is 5 or n in 7..11 and n in 11..13", status));
    716     checkSelect(pr, status, __LINE__, "a", "2", "5", "11", END_MARK);
    717     checkSelect(pr, status, __LINE__, "other", "3", "4", "6", "8", "10", "12", "13", END_MARK);
    718 
    719     // Number attributes -
    720     //   n: the number itself
    721     //   i: integer digits
    722     //   f: visible fraction digits
    723     //   t: f with trailing zeros removed.
    724     //   v: number of visible fraction digits
    725     //   j: = n if there are no visible fraction digits
    726     //      != anything if there are visible fraction digits
    727 
    728     pr.adoptInstead(PluralRules::createRules("a: i is 123", status));
    729     checkSelect(pr, status, __LINE__, "a", "123", "123.0", "123.1", "0123.99", END_MARK);
    730     checkSelect(pr, status, __LINE__, "other", "124", "122.0", END_MARK);
    731 
    732     pr.adoptInstead(PluralRules::createRules("a: f is 120", status));
    733     checkSelect(pr, status, __LINE__, "a", "1.120", "0.120", "11123.120", "0123.120", END_MARK);
    734     checkSelect(pr, status, __LINE__, "other", "1.121", "122.1200", "1.12", "120", END_MARK);
    735 
    736     pr.adoptInstead(PluralRules::createRules("a: t is 12", status));
    737     checkSelect(pr, status, __LINE__, "a", "1.120", "0.12", "11123.12000", "0123.1200000", END_MARK);
    738     checkSelect(pr, status, __LINE__, "other", "1.121", "122.1200001", "1.11", "12", END_MARK);
    739 
    740     pr.adoptInstead(PluralRules::createRules("a: v is 3", status));
    741     checkSelect(pr, status, __LINE__, "a", "1.120", "0.000", "11123.100", "0123.124", ".666", END_MARK);
    742     checkSelect(pr, status, __LINE__, "other", "1.1212", "122.12", "1.1", "122", "0.0000", END_MARK);
    743 
    744     pr.adoptInstead(PluralRules::createRules("a: v is 0 and i is 123", status));
    745     checkSelect(pr, status, __LINE__, "a", "123", "123.", END_MARK);
    746     checkSelect(pr, status, __LINE__, "other", "123.0", "123.1", "123.123", "0.123", END_MARK);
    747 
    748     // The reserved words from the rule syntax will also function as keywords.
    749     pr.adoptInstead(PluralRules::createRules("a: n is 21; n: n is 22; i: n is 23; f: n is 24;"
    750                                              "t: n is 25; v: n is 26; w: n is 27; j: n is 28"
    751                                              , status));
    752     checkSelect(pr, status, __LINE__, "other", "20", "29", END_MARK);
    753     checkSelect(pr, status, __LINE__, "a", "21", END_MARK);
    754     checkSelect(pr, status, __LINE__, "n", "22", END_MARK);
    755     checkSelect(pr, status, __LINE__, "i", "23", END_MARK);
    756     checkSelect(pr, status, __LINE__, "f", "24", END_MARK);
    757     checkSelect(pr, status, __LINE__, "t", "25", END_MARK);
    758     checkSelect(pr, status, __LINE__, "v", "26", END_MARK);
    759     checkSelect(pr, status, __LINE__, "w", "27", END_MARK);
    760     checkSelect(pr, status, __LINE__, "j", "28", END_MARK);
    761 
    762 
    763     pr.adoptInstead(PluralRules::createRules("not: n=31; and: n=32; or: n=33; mod: n=34;"
    764                                              "in: n=35; within: n=36;is:n=37"
    765                                              , status));
    766     checkSelect(pr, status, __LINE__, "other",  "30", "39", END_MARK);
    767     checkSelect(pr, status, __LINE__, "not",    "31", END_MARK);
    768     checkSelect(pr, status, __LINE__, "and",    "32", END_MARK);
    769     checkSelect(pr, status, __LINE__, "or",     "33", END_MARK);
    770     checkSelect(pr, status, __LINE__, "mod",    "34", END_MARK);
    771     checkSelect(pr, status, __LINE__, "in",     "35", END_MARK);
    772     checkSelect(pr, status, __LINE__, "within", "36", END_MARK);
    773     checkSelect(pr, status, __LINE__, "is",     "37", END_MARK);
    774 
    775 // Test cases from ICU4J PluralRulesTest.parseTestData
    776 
    777     pr.adoptInstead(PluralRules::createRules("a: n is 1", status));
    778     checkSelect(pr, status, __LINE__, "a", "1", END_MARK);
    779     pr.adoptInstead(PluralRules::createRules("a: n mod 10 is 2", status));
    780     checkSelect(pr, status, __LINE__, "a", "2", "12", "22", END_MARK);
    781     pr.adoptInstead(PluralRules::createRules("a: n is not 1", status));
    782     checkSelect(pr, status, __LINE__, "a", "0", "2", "3", "4", "5", END_MARK);
    783     pr.adoptInstead(PluralRules::createRules("a: n mod 3 is not 1", status));
    784     checkSelect(pr, status, __LINE__, "a", "0", "2", "3", "5", "6", "8", "9", END_MARK);
    785     pr.adoptInstead(PluralRules::createRules("a: n in 2..5", status));
    786     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", END_MARK);
    787     pr.adoptInstead(PluralRules::createRules("a: n within 2..5", status));
    788     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", END_MARK);
    789     pr.adoptInstead(PluralRules::createRules("a: n not in 2..5", status));
    790     checkSelect(pr, status, __LINE__, "a", "0", "1", "6", "7", "8", END_MARK);
    791     pr.adoptInstead(PluralRules::createRules("a: n not within 2..5", status));
    792     checkSelect(pr, status, __LINE__, "a", "0", "1", "6", "7", "8", END_MARK);
    793     pr.adoptInstead(PluralRules::createRules("a: n mod 10 in 2..5", status));
    794     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", "12", "13", "14", "15", "22", "23", "24", "25", END_MARK);
    795     pr.adoptInstead(PluralRules::createRules("a: n mod 10 within 2..5", status));
    796     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", "12", "13", "14", "15", "22", "23", "24", "25", END_MARK);
    797     pr.adoptInstead(PluralRules::createRules("a: n mod 10 is 2 and n is not 12", status));
    798     checkSelect(pr, status, __LINE__, "a", "2", "22", "32", "42", END_MARK);
    799     pr.adoptInstead(PluralRules::createRules("a: n mod 10 in 2..3 or n mod 10 is 5", status));
    800     checkSelect(pr, status, __LINE__, "a", "2", "3", "5", "12", "13", "15", "22", "23", "25", END_MARK);
    801     pr.adoptInstead(PluralRules::createRules("a: n mod 10 within 2..3 or n mod 10 is 5", status));
    802     checkSelect(pr, status, __LINE__, "a", "2", "3", "5", "12", "13", "15", "22", "23", "25", END_MARK);
    803     pr.adoptInstead(PluralRules::createRules("a: n is 1 or n is 4 or n is 23", status));
    804     checkSelect(pr, status, __LINE__, "a", "1", "4", "23", END_MARK);
    805     pr.adoptInstead(PluralRules::createRules("a: n mod 2 is 1 and n is not 3 and n in 1..11", status));
    806     checkSelect(pr, status, __LINE__, "a", "1", "5", "7", "9", "11", END_MARK);
    807     pr.adoptInstead(PluralRules::createRules("a: n mod 2 is 1 and n is not 3 and n within 1..11", status));
    808     checkSelect(pr, status, __LINE__, "a", "1", "5", "7", "9", "11", END_MARK);
    809     pr.adoptInstead(PluralRules::createRules("a: n mod 2 is 1 or n mod 5 is 1 and n is not 6", status));
    810     checkSelect(pr, status, __LINE__, "a", "1", "3", "5", "7", "9", "11", "13", "15", "16", END_MARK);
    811     pr.adoptInstead(PluralRules::createRules("a: n in 2..5; b: n in 5..8; c: n mod 2 is 1", status));
    812     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", END_MARK);
    813     checkSelect(pr, status, __LINE__, "b", "6", "7", "8", END_MARK);
    814     checkSelect(pr, status, __LINE__, "c", "1", "9", "11", END_MARK);
    815     pr.adoptInstead(PluralRules::createRules("a: n within 2..5; b: n within 5..8; c: n mod 2 is 1", status));
    816     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", END_MARK);
    817     checkSelect(pr, status, __LINE__, "b", "6", "7", "8", END_MARK);
    818     checkSelect(pr, status, __LINE__, "c", "1", "9", "11", END_MARK);
    819     pr.adoptInstead(PluralRules::createRules("a: n in 2, 4..6; b: n within 7..9,11..12,20", status));
    820     checkSelect(pr, status, __LINE__, "a", "2", "4", "5", "6", END_MARK);
    821     checkSelect(pr, status, __LINE__, "b", "7", "8", "9", "11", "12", "20", END_MARK);
    822     pr.adoptInstead(PluralRules::createRules("a: n in 2..8, 12 and n not in 4..6", status));
    823     checkSelect(pr, status, __LINE__, "a", "2", "3", "7", "8", "12", END_MARK);
    824     pr.adoptInstead(PluralRules::createRules("a: n mod 10 in 2, 3,5..7 and n is not 12", status));
    825     checkSelect(pr, status, __LINE__, "a", "2", "3", "5", "6", "7", "13", "15", "16", "17", END_MARK);
    826     pr.adoptInstead(PluralRules::createRules("a: n in 2..6, 3..7", status));
    827     checkSelect(pr, status, __LINE__, "a", "2", "3", "4", "5", "6", "7", END_MARK);
    828 
    829     // Extended Syntax, with '=', '!=' and '%' operators.
    830     pr.adoptInstead(PluralRules::createRules("a: n = 1..8 and n!= 2,3,4,5", status));
    831     checkSelect(pr, status, __LINE__, "a", "1", "6", "7", "8", END_MARK);
    832     checkSelect(pr, status, __LINE__, "other", "0", "2", "3", "4", "5", "9", END_MARK);
    833     pr.adoptInstead(PluralRules::createRules("a:n % 10 != 1", status));
    834     checkSelect(pr, status, __LINE__, "a", "2", "6", "7", "8", END_MARK);
    835     checkSelect(pr, status, __LINE__, "other", "1", "21", "211", "91", END_MARK);
    836 }
    837 
    838 
    839 void PluralRulesTest::testAvailbleLocales() {
    840 
    841     // Hash set of (char *) strings.
    842     UErrorCode status = U_ZERO_ERROR;
    843     UHashtable *localeSet = uhash_open(uhash_hashUnicodeString, uhash_compareUnicodeString, uhash_compareLong, &status);
    844     uhash_setKeyDeleter(localeSet, uprv_deleteUObject);
    845     if (U_FAILURE(status)) {
    846         errln("file %s,  line %d: Error status = %s", __FILE__, __LINE__, u_errorName(status));
    847         return;
    848     }
    849 
    850     // Check that each locale returned by the iterator is unique.
    851     StringEnumeration *localesEnum = PluralRules::getAvailableLocales(status);
    852     int localeCount = 0;
    853     for (;;) {
    854         const char *locale = localesEnum->next(NULL, status);
    855         if (U_FAILURE(status)) {
    856             dataerrln("file %s,  line %d: Error status = %s", __FILE__, __LINE__, u_errorName(status));
    857             return;
    858         }
    859         if (locale == NULL) {
    860             break;
    861         }
    862         localeCount++;
    863         int32_t oldVal = uhash_puti(localeSet, new UnicodeString(locale), 1, &status);
    864         if (oldVal != 0) {
    865             errln("file %s,  line %d: locale %s was seen before.", __FILE__, __LINE__, locale);
    866         }
    867     }
    868 
    869     // Reset the iterator, verify that we get the same count.
    870     localesEnum->reset(status);
    871     int32_t localeCount2 = 0;
    872     while (localesEnum->next(NULL, status) != NULL) {
    873         if (U_FAILURE(status)) {
    874             errln("file %s,  line %d: Error status = %s", __FILE__, __LINE__, u_errorName(status));
    875             break;
    876         }
    877         localeCount2++;
    878     }
    879     if (localeCount != localeCount2) {
    880         errln("file %s,  line %d: locale counts differ. They are (%d, %d)",
    881             __FILE__, __LINE__, localeCount, localeCount2);
    882     }
    883 
    884     // Instantiate plural rules for each available locale.
    885     localesEnum->reset(status);
    886     for (;;) {
    887         status = U_ZERO_ERROR;
    888         const char *localeName = localesEnum->next(NULL, status);
    889         if (U_FAILURE(status)) {
    890             errln("file %s,  line %d: Error status = %s, locale = %s",
    891                 __FILE__, __LINE__, u_errorName(status), localeName);
    892             return;
    893         }
    894         if (localeName == NULL) {
    895             break;
    896         }
    897         Locale locale = Locale::createFromName(localeName);
    898         PluralRules *pr = PluralRules::forLocale(locale, status);
    899         if (U_FAILURE(status)) {
    900             errln("file %s,  line %d: Error %s creating plural rules for locale %s",
    901                 __FILE__, __LINE__, u_errorName(status), localeName);
    902             continue;
    903         }
    904         if (pr == NULL) {
    905             errln("file %s, line %d: Null plural rules for locale %s", __FILE__, __LINE__, localeName);
    906             continue;
    907         }
    908 
    909         // Pump some numbers through the plural rules.  Can't check for correct results,
    910         // mostly this to tickle any asserts or crashes that may be lurking.
    911         for (double n=0; n<120.0; n+=0.5) {
    912             UnicodeString keyword = pr->select(n);
    913             if (keyword.length() == 0) {
    914                 errln("file %s, line %d, empty keyword for n = %g, locale %s",
    915                     __FILE__, __LINE__, n, localeName);
    916             }
    917         }
    918         delete pr;
    919     }
    920 
    921     uhash_close(localeSet);
    922     delete localesEnum;
    923 
    924 }
    925 
    926 
    927 void PluralRulesTest::testParseErrors() {
    928     // Test rules with syntax errors.
    929     // Creation of PluralRules from them should fail.
    930 
    931     static const char *testCases[] = {
    932             "a: n mod 10, is 1",
    933             "a: q is 13",
    934             "a  n is 13",
    935             "a: n is 13,",
    936             "a: n is 13, 15,   b: n is 4",
    937             "a: n is 1, 3, 4.. ",
    938             "a: n within 5..4",
    939             "A: n is 13",          // Uppercase keywords not allowed.
    940             "a: n ! = 3",          // spaces in != operator
    941             "a: n = not 3",        // '=' not exact equivalent of 'is'
    942             "a: n ! in 3..4"       // '!' not exact equivalent of 'not'
    943             "a: n % 37 ! in 3..4"
    944 
    945             };
    946     for (int i=0; i<UPRV_LENGTHOF(testCases); i++) {
    947         const char *rules = testCases[i];
    948         UErrorCode status = U_ZERO_ERROR;
    949         PluralRules *pr = PluralRules::createRules(UnicodeString(rules), status);
    950         if (U_SUCCESS(status)) {
    951             errln("file %s, line %d, expected failure with \"%s\".", __FILE__, __LINE__, rules);
    952         }
    953         if (pr != NULL) {
    954             errln("file %s, line %d, expected NULL. Rules: \"%s\"", __FILE__, __LINE__, rules);
    955         }
    956     }
    957     return;
    958 }
    959 
    960 
    961 void PluralRulesTest::testFixedDecimal() {
    962     struct DoubleTestCase {
    963         double n;
    964         int32_t fractionDigitCount;
    965         int64_t fractionDigits;
    966     };
    967 
    968     // Check that the internal functions for extracting the decimal fraction digits from
    969     //   a double value are working.
    970     static DoubleTestCase testCases[] = {
    971         {1.0, 0, 0},
    972         {123456.0, 0, 0},
    973         {1.1, 1, 1},
    974         {1.23, 2, 23},
    975         {1.234, 3, 234},
    976         {1.2345, 4, 2345},
    977         {1.23456, 5, 23456},
    978         {.1234, 4, 1234},
    979         {.01234, 5, 1234},
    980         {.001234, 6, 1234},
    981         {.0001234, 7, 1234},
    982         {100.1234, 4, 1234},
    983         {100.01234, 5, 1234},
    984         {100.001234, 6, 1234},
    985         {100.0001234, 7, 1234}
    986     };
    987 
    988     for (int i=0; i<UPRV_LENGTHOF(testCases); ++i) {
    989         DoubleTestCase &tc = testCases[i];
    990         int32_t numFractionDigits = FixedDecimal::decimals(tc.n);
    991         if (numFractionDigits != tc.fractionDigitCount) {
    992             errln("file %s, line %d: decimals(%g) expected %d, actual %d",
    993                    __FILE__, __LINE__, tc.n, tc.fractionDigitCount, numFractionDigits);
    994             continue;
    995         }
    996         int64_t actualFractionDigits = FixedDecimal::getFractionalDigits(tc.n, numFractionDigits);
    997         if (actualFractionDigits != tc.fractionDigits) {
    998             errln("file %s, line %d: getFractionDigits(%g, %d): expected %ld, got %ld",
    999                   __FILE__, __LINE__, tc.n, numFractionDigits, tc.fractionDigits, actualFractionDigits);
   1000         }
   1001     }
   1002 }
   1003 
   1004 
   1005 
   1006 #endif /* #if !UCONFIG_NO_FORMATTING */
   1007