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1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /***********************************************************************
4  * COPYRIGHT:
5  * Copyright (c) 1997-2015, International Business Machines Corporation
6  * and others. All Rights Reserved.
7  ***********************************************************************/
8 
9 #include "unicode/utypes.h"
10 
11 #if !UCONFIG_NO_FORMATTING
12 
13 #include "unicode/datefmt.h"
14 #include "unicode/smpdtfmt.h"
15 #include "unicode/gregocal.h"
16 #include "dtfmtrtts.h"
17 #include "caltest.h"
18 #include "cstring.h"
19 
20 #include <stdio.h>
21 #include <string.h>
22 
23 // *****************************************************************************
24 // class DateFormatRoundTripTest
25 // *****************************************************************************
26 
27 // Useful for turning up subtle bugs: Change the following to TRUE, recompile,
28 // and run while at lunch.
29 // Warning -- makes test run infinite loop!!!
30 #ifndef INFINITE
31 #define INFINITE 0
32 #endif
33 
34 // Define this to test just a single locale
35 //#define TEST_ONE_LOC  "cs_CZ"
36 
37 // If SPARSENESS is > 0, we don't run each exhaustive possibility.
38 // There are 24 total possible tests per each locale.  A SPARSENESS
39 // of 12 means we run half of them.  A SPARSENESS of 23 means we run
40 // 1 of them.  SPARSENESS _must_ be in the range 0..23.
41 int32_t DateFormatRoundTripTest::SPARSENESS = 0;
42 int32_t DateFormatRoundTripTest::TRIALS = 4;
43 int32_t DateFormatRoundTripTest::DEPTH = 5;
44 
DateFormatRoundTripTest()45 DateFormatRoundTripTest::DateFormatRoundTripTest() : dateFormat(0) {
46 }
47 
~DateFormatRoundTripTest()48 DateFormatRoundTripTest::~DateFormatRoundTripTest() {
49     delete dateFormat;
50 }
51 
52 #define CASE(id,test) case id: name = #test; if (exec) { logln(#test "---"); logln((UnicodeString)""); test(); } break;
53 
54 void
runIndexedTest(int32_t index,UBool exec,const char * & name,char * par)55 DateFormatRoundTripTest::runIndexedTest( int32_t index, UBool exec, const char* &name, char* par )
56 {
57     optionv = (par && *par=='v');
58     switch (index) {
59         CASE(0,TestDateFormatRoundTrip)
60         CASE(1, TestCentury)
61         default: name = ""; break;
62     }
63 }
64 
65 UBool
failure(UErrorCode status,const char * msg)66 DateFormatRoundTripTest::failure(UErrorCode status, const char* msg)
67 {
68     if(U_FAILURE(status)) {
69         errln(UnicodeString("FAIL: ") + msg + " failed, error " + u_errorName(status));
70         return TRUE;
71     }
72 
73     return FALSE;
74 }
75 
76 UBool
failure(UErrorCode status,const char * msg,const UnicodeString & str)77 DateFormatRoundTripTest::failure(UErrorCode status, const char* msg, const UnicodeString& str)
78 {
79     if(U_FAILURE(status)) {
80         UnicodeString escaped;
81         escape(str,escaped);
82         errln(UnicodeString("FAIL: ") + msg + " failed, error " + u_errorName(status) + ", str=" + escaped);
83         return TRUE;
84     }
85 
86     return FALSE;
87 }
88 
TestCentury()89 void DateFormatRoundTripTest::TestCentury()
90 {
91     UErrorCode status = U_ZERO_ERROR;
92     Locale locale("es_PA");
93     UnicodeString pattern = "MM/dd/yy hh:mm:ss a z";
94     SimpleDateFormat fmt(pattern, locale, status);
95     if (U_FAILURE(status)) {
96         dataerrln("Fail: construct SimpleDateFormat: %s", u_errorName(status));
97         return;
98     }
99     UDate date[] = {-55018555891590.05, 0, 0};
100     UnicodeString result[2];
101 
102     fmt.format(date[0], result[0]);
103     date[1] = fmt.parse(result[0], status);
104     fmt.format(date[1], result[1]);
105     date[2] = fmt.parse(result[1], status);
106 
107     /* This test case worked OK by accident before.  date[1] != date[0],
108      * because we use -80/+20 year window for 2-digit year parsing.
109      * (date[0] is in year 1926, date[1] is in year 2026.)  result[1] set
110      * by the first format call returns "07/13/26 07:48:28 p.m. PST",
111      * which is correct, because DST was not used in year 1926 in zone
112      * America/Los_Angeles.  When this is parsed, date[1] becomes a time
113      * in 2026, which is "07/13/26 08:48:28 p.m. PDT".  There was a zone
114      * offset calculation bug that observed DST in 1926, which was resolved.
115      * Before the bug was resolved, result[0] == result[1] was true,
116      * but after the bug fix, the expected result is actually
117      * result[0] != result[1]. -Yoshito
118      */
119     /* TODO: We need to review this code and clarify what we really
120      * want to test here.
121      */
122     //if (date[1] != date[2] || result[0] != result[1]) {
123     if (date[1] != date[2]) {
124         errln("Round trip failure: \"%S\" (%f), \"%S\" (%f)", result[0].getBuffer(), date[1], result[1].getBuffer(), date[2]);
125     }
126 }
127 
128 // ==
129 
TestDateFormatRoundTrip()130 void DateFormatRoundTripTest::TestDateFormatRoundTrip()
131 {
132     UErrorCode status = U_ZERO_ERROR;
133 
134     getFieldCal = Calendar::createInstance(status);
135     if (U_FAILURE(status)) {
136         dataerrln("Fail: Calendar::createInstance: %s", u_errorName(status));
137         return;
138     }
139 
140 
141     int32_t locCount = 0;
142     const Locale *avail = DateFormat::getAvailableLocales(locCount);
143     logln("DateFormat available locales: %d", locCount);
144     if(quick) {
145         SPARSENESS = 18;
146         logln("Quick mode: only testing SPARSENESS = 18");
147     }
148     TimeZone *tz = TimeZone::createDefault();
149     UnicodeString temp;
150     logln("Default TimeZone:             " + tz->getID(temp));
151     delete tz;
152 
153 #ifdef TEST_ONE_LOC // define this to just test ONE locale.
154     Locale loc(TEST_ONE_LOC);
155     test(loc);
156 #if INFINITE
157     for(;;) {
158       test(loc);
159     }
160 #endif
161 
162 #else
163 # if INFINITE
164     // Special infinite loop test mode for finding hard to reproduce errors
165     Locale loc = Locale::getDefault();
166     logln("ENTERING INFINITE TEST LOOP FOR Locale: " + loc.getDisplayName(temp));
167     for(;;)
168         test(loc);
169 # else
170     test(Locale::getDefault());
171 
172 #if 1
173     // installed locales
174     for (int i=0; i < locCount; ++i) {
175         test(avail[i]);
176     }
177 #endif
178 
179 #if 1
180     // special locales
181     int32_t jCount = CalendarTest::testLocaleCount();
182     for (int32_t j=0; j < jCount; ++j) {
183         test(Locale(CalendarTest::testLocaleID(j)));
184     }
185 #endif
186 
187 # endif
188 #endif
189 
190     delete getFieldCal;
191 }
192 
styleName(DateFormat::EStyle s)193 static const char *styleName(DateFormat::EStyle s)
194 {
195     switch(s)
196     {
197     case DateFormat::SHORT: return "SHORT";
198     case DateFormat::MEDIUM: return "MEDIUM";
199     case DateFormat::LONG: return "LONG";
200     case DateFormat::FULL: return "FULL";
201 //  case DateFormat::DEFAULT: return "DEFAULT";
202     case DateFormat::DATE_OFFSET: return "DATE_OFFSET";
203     case DateFormat::NONE: return "NONE";
204     case DateFormat::DATE_TIME: return "DATE_TIME";
205     default: return "Unknown";
206     }
207 }
208 
test(const Locale & loc)209 void DateFormatRoundTripTest::test(const Locale& loc)
210 {
211     UnicodeString temp;
212 #if !INFINITE
213     logln("Locale: " + loc.getDisplayName(temp));
214 #endif
215 
216     // Total possibilities = 24
217     //  4 date
218     //  4 time
219     //  16 date-time
220     UBool TEST_TABLE [24];//= new boolean[24];
221     int32_t i = 0;
222     for(i = 0; i < 24; ++i)
223         TEST_TABLE[i] = TRUE;
224 
225     // If we have some sparseness, implement it here.  Sparseness decreases
226     // test time by eliminating some tests, up to 23.
227     for(i = 0; i < SPARSENESS; ) {
228         int random = (int)(randFraction() * 24);
229         if (random >= 0 && random < 24 && TEST_TABLE[i]) {
230             TEST_TABLE[i] = FALSE;
231             ++i;
232         }
233     }
234 
235     int32_t itable = 0;
236     int32_t style = 0;
237     for(style = DateFormat::FULL; style <= DateFormat::SHORT; ++style) {
238         if(TEST_TABLE[itable++]) {
239             logln("Testing style " + UnicodeString(styleName((DateFormat::EStyle)style)));
240             DateFormat *df = DateFormat::createDateInstance((DateFormat::EStyle)style, loc);
241             if(df == NULL) {
242               errln(UnicodeString("Could not DF::createDateInstance ") + UnicodeString(styleName((DateFormat::EStyle)style)) +      " Locale: " + loc.getDisplayName(temp));
243             } else {
244               test(df, loc);
245               delete df;
246             }
247         }
248     }
249 
250     for(style = DateFormat::FULL; style <= DateFormat::SHORT; ++style) {
251         if (TEST_TABLE[itable++]) {
252             logln("Testing style " + UnicodeString(styleName((DateFormat::EStyle)style)));
253             DateFormat *df = DateFormat::createTimeInstance((DateFormat::EStyle)style, loc);
254             if(df == NULL) {
255               errln(UnicodeString("Could not DF::createTimeInstance ") + UnicodeString(styleName((DateFormat::EStyle)style)) + " Locale: " + loc.getDisplayName(temp));
256             } else {
257               test(df, loc, TRUE);
258               delete df;
259             }
260         }
261     }
262 
263     for(int32_t dstyle = DateFormat::FULL; dstyle <= DateFormat::SHORT; ++dstyle) {
264         for(int32_t tstyle = DateFormat::FULL; tstyle <= DateFormat::SHORT; ++tstyle) {
265             if(TEST_TABLE[itable++]) {
266                 logln("Testing dstyle" + UnicodeString(styleName((DateFormat::EStyle)dstyle)) + ", tstyle" + UnicodeString(styleName((DateFormat::EStyle)tstyle)) );
267                 DateFormat *df = DateFormat::createDateTimeInstance((DateFormat::EStyle)dstyle, (DateFormat::EStyle)tstyle, loc);
268                 if(df == NULL) {
269                     dataerrln(UnicodeString("Could not DF::createDateTimeInstance ") + UnicodeString(styleName((DateFormat::EStyle)dstyle)) + ", tstyle" + UnicodeString(styleName((DateFormat::EStyle)tstyle))    + "Locale: " + loc.getDisplayName(temp));
270                 } else {
271                     test(df, loc);
272                     delete df;
273                 }
274             }
275         }
276     }
277 }
278 
test(DateFormat * fmt,const Locale & origLocale,UBool timeOnly)279 void DateFormatRoundTripTest::test(DateFormat *fmt, const Locale &origLocale, UBool timeOnly)
280 {
281     UnicodeString pat;
282     if(fmt->getDynamicClassID() != SimpleDateFormat::getStaticClassID()) {
283         errln("DateFormat wasn't a SimpleDateFormat");
284         return;
285     }
286 
287     UBool isGregorian = FALSE;
288     UErrorCode minStatus = U_ZERO_ERROR;
289     if(fmt->getCalendar() == NULL) {
290       errln((UnicodeString)"DateFormatRoundTripTest::test, DateFormat getCalendar() returns null for " + origLocale.getName());
291       return;
292     }
293     UDate minDate = CalendarTest::minDateOfCalendar(*fmt->getCalendar(), isGregorian, minStatus);
294     if(U_FAILURE(minStatus)) {
295       errln((UnicodeString)"Failure getting min date for " + origLocale.getName());
296       return;
297     }
298     //logln(UnicodeString("Min date is ") + fullFormat(minDate)  + " for " + origLocale.getName());
299 
300     pat = ((SimpleDateFormat*)fmt)->toPattern(pat);
301 
302     // NOTE TO MAINTAINER
303     // This indexOf check into the pattern needs to be refined to ignore
304     // quoted characters.  Currently, this isn't a problem with the locale
305     // patterns we have, but it may be a problem later.
306 
307     UBool hasEra = (pat.indexOf(UnicodeString("G")) != -1);
308     UBool hasZoneDisplayName = (pat.indexOf(UnicodeString("z")) != -1) || (pat.indexOf(UnicodeString("v")) != -1)
309         || (pat.indexOf(UnicodeString("V")) != -1);
310 
311     // Because patterns contain incomplete data representing the Date,
312     // we must be careful of how we do the roundtrip.  We start with
313     // a randomly generated Date because they're easier to generate.
314     // From this we get a string.  The string is our real starting point,
315     // because this string should parse the same way all the time.  Note
316     // that it will not necessarily parse back to the original date because
317     // of incompleteness in patterns.  For example, a time-only pattern won't
318     // parse back to the same date.
319 
320     //try {
321         for(int i = 0; i < TRIALS; ++i) {
322             UDate *d                = new UDate    [DEPTH];
323             UnicodeString *s    = new UnicodeString[DEPTH];
324 
325             if(isGregorian == TRUE) {
326               d[0] = generateDate();
327             } else {
328               d[0] = generateDate(minDate);
329             }
330 
331             UErrorCode status = U_ZERO_ERROR;
332 
333             // We go through this loop until we achieve a match or until
334             // the maximum loop count is reached.  We record the points at
335             // which the date and the string starts to match.  Once matching
336             // starts, it should continue.
337             int loop;
338             int dmatch = 0; // d[dmatch].getTime() == d[dmatch-1].getTime()
339             int smatch = 0; // s[smatch].equals(s[smatch-1])
340             for(loop = 0; loop < DEPTH; ++loop) {
341                 if (loop > 0)  {
342                     d[loop] = fmt->parse(s[loop-1], status);
343                     if(U_FAILURE(status)) {
344                         ParsePosition ppos;
345                         (void)fmt->parse(s[loop-1], ppos);
346                         failure(status, "fmt->parse", s[loop-1]+" in locale: " + origLocale.getName() +
347                                 " with pattern: " + pat + " has errIndex: " + ppos.getErrorIndex());
348                         status = U_ZERO_ERROR; /* any error would have been reported */
349                     }
350                 }
351 
352                 s[loop] = fmt->format(d[loop], s[loop]);
353 
354                 // For displaying which date is being tested
355                 //logln(s[loop] + " = " + fullFormat(d[loop]));
356 
357                 if(s[loop].length() == 0) {
358                   errln("FAIL: fmt->format gave 0-length string in " + pat + " with number " + d[loop] + " in locale " + origLocale.getName());
359                 }
360 
361                 if(loop > 0) {
362                     if(smatch == 0) {
363                         UBool match = s[loop] == s[loop-1];
364                         if(smatch == 0) {
365                             if(match)
366                                 smatch = loop;
367                         }
368                         else if( ! match)
369                             errln("FAIL: String mismatch after match");
370                     }
371 
372                     if(dmatch == 0) {
373                         // {sfb} watch out here, this might not work
374                         UBool match = d[loop]/*.getTime()*/ == d[loop-1]/*.getTime()*/;
375                         if(dmatch == 0) {
376                             if(match)
377                                 dmatch = loop;
378                         }
379                         else if( ! match)
380                             errln("FAIL: Date mismatch after match");
381                     }
382 
383                     if(smatch != 0 && dmatch != 0)
384                         break;
385                 }
386             }
387             // At this point loop == DEPTH if we've failed, otherwise loop is the
388             // max(smatch, dmatch), that is, the index at which we have string and
389             // date matching.
390 
391             // Date usually matches in 2.  Exceptions handled below.
392             int maxDmatch = 2;
393             int maxSmatch = 1;
394             if (dmatch > maxDmatch) {
395                 // Time-only pattern with zone information and a starting date in PST.
396                 if(timeOnly && hasZoneDisplayName) {
397                     int32_t startRaw, startDst;
398                     fmt->getTimeZone().getOffset(d[0], FALSE, startRaw, startDst, status);
399                     failure(status, "TimeZone::getOffset");
400                     // if the start offset is greater than the offset on Jan 1, 1970
401                     // in PST, then need one more round trip.  There are two cases
402                     // fall into this category.  The start date is 1) DST or
403                     // 2) LMT (GMT-07:52:58).
404                     if (startRaw + startDst > -28800000) {
405                         maxDmatch = 3;
406                         maxSmatch = 2;
407                     }
408                 }
409             }
410 
411             // String usually matches in 1.  Exceptions are checked for here.
412             if(smatch > maxSmatch) { // Don't compute unless necessary
413                 UBool in0;
414                 // Starts in BC, with no era in pattern
415                 if( ! hasEra && getField(d[0], UCAL_ERA) == GregorianCalendar::BC)
416                     maxSmatch = 2;
417                 // Starts in DST, no year in pattern
418                 else if((in0=fmt->getTimeZone().inDaylightTime(d[0], status)) && ! failure(status, "gettingDaylightTime") &&
419                          pat.indexOf(UnicodeString("yyyy")) == -1)
420                     maxSmatch = 2;
421                 // If we start not in DST, but transition into DST
422                 else if (!in0 &&
423                          fmt->getTimeZone().inDaylightTime(d[1], status) && !failure(status, "gettingDaylightTime"))
424                     maxSmatch = 2;
425                 // Two digit year with no time zone change,
426                 // unless timezone isn't used or we aren't close to the DST changover
427                 else if (pat.indexOf(UnicodeString("y")) != -1
428                         && pat.indexOf(UnicodeString("yyyy")) == -1
429                         && getField(d[0], UCAL_YEAR)
430                             != getField(d[dmatch], UCAL_YEAR)
431                         && !failure(status, "error status [smatch>maxSmatch]")
432                         && ((hasZoneDisplayName
433                          && (fmt->getTimeZone().inDaylightTime(d[0], status)
434                                 == fmt->getTimeZone().inDaylightTime(d[dmatch], status)
435                             || getField(d[0], UCAL_MONTH) == UCAL_APRIL
436                             || getField(d[0], UCAL_MONTH) == UCAL_OCTOBER))
437                          || !hasZoneDisplayName)
438                          )
439                 {
440                     maxSmatch = 2;
441                 }
442                 // If zone display name is used, fallback format might be used before 1970
443                 else if (hasZoneDisplayName && d[0] < 0) {
444                     maxSmatch = 2;
445                 }
446                 else if (timeOnly && !isGregorian && hasZoneDisplayName && maxSmatch == 1) {
447                     int32_t startRaw, startDst;
448                     fmt->getTimeZone().getOffset(d[1], FALSE, startRaw, startDst, status);
449                     failure(status, "TimeZone::getOffset");
450                     // If the calendar type is not Gregorian and the pattern is time only,
451                     // the calendar implementation may use a date before 1970 as day 0.
452                     // In this case, time zone offset of the default year might be
453                     // different from the one at 1970-01-01 in PST and string match requires
454                     // one more iteration.
455                     if (startRaw + startDst != -28800000) {
456                         maxSmatch = 2;
457                     }
458                 }
459             }
460 
461             /*
462              * Special case for Japanese and Buddhist (could have large negative years)
463              * Also, Hebrew calendar need help handling leap month.
464              */
465             if(dmatch > maxDmatch || smatch > maxSmatch) {
466               const char *type = fmt->getCalendar()->getType();
467               if(!strcmp(type,"japanese") || (!strcmp(type,"buddhist"))) {
468                 maxSmatch = 4;
469                 maxDmatch = 4;
470               } else if(!strcmp(type,"hebrew")) {
471                   maxSmatch = 3;
472                   maxDmatch = 3;
473               } else if (timeOnly && uprv_strcmp(origLocale.getName(),"ar_JO@calendar=islamic-civil")==0 &&
474                       logKnownIssue("21049", "ar_JO@calendar=islamic-civil timeOnly roundtrip converges too slowly")) {
475                   // For some reason, for time-only tests, ar_JO@calendar=islamic-civil is no
476                   // longer converging to a match as fast as expected above. Investigate with
477                   // ICU-21022, but meanwhile allow more cycles for convergence.
478                   maxSmatch = 2;
479                   maxDmatch = 3;
480               }
481             }
482 
483             // Use @v to see verbose results on successful cases
484             UBool fail = (dmatch > maxDmatch || smatch > maxSmatch);
485             if (optionv || fail) {
486                 if (fail) {
487                     errln(UnicodeString("\nFAIL: Pattern: ") + pat +
488                           " in Locale: " + origLocale.getName() +
489                           "\nget dmatch: " + dmatch + " (expected max " + maxDmatch +
490                           "), smatch: " + smatch + " (expected max " + maxSmatch + ")");
491                 } else {
492                     errln(UnicodeString("\nOk: Pattern: ") + pat +
493                           " in Locale: " + origLocale.getName());
494                 }
495 
496                 logln("Date iters until match=%d (max allowed=%d), string iters until match=%d (max allowed=%d)",
497                       dmatch,maxDmatch, smatch, maxSmatch);
498 
499                 for(int j = 0; j <= loop && j < DEPTH; ++j) {
500                     UnicodeString temp;
501                     FieldPosition pos(FieldPosition::DONT_CARE);
502                     errln((j>0?" P> ":"    ") + fullFormat(d[j]) + " F> " +
503                           escape(s[j], temp) + UnicodeString(" d=") + d[j] +
504                           (j > 0 && d[j]/*.getTime()*/==d[j-1]/*.getTime()*/?" d==":"") +
505                           (j > 0 && s[j] == s[j-1]?" s==":""));
506                 }
507             }
508             delete[] d;
509             delete[] s;
510         }
511     /*}
512     catch (ParseException e) {
513         errln("Exception: " + e.getMessage());
514         logln(e.toString());
515     }*/
516 }
517 
fullFormat(UDate d)518 const UnicodeString& DateFormatRoundTripTest::fullFormat(UDate d) {
519     UErrorCode ec = U_ZERO_ERROR;
520     if (dateFormat == 0) {
521         dateFormat = new SimpleDateFormat((UnicodeString)"EEE MMM dd HH:mm:ss.SSS zzz yyyy G", ec);
522         if (U_FAILURE(ec) || dateFormat == 0) {
523             fgStr = "[FAIL: SimpleDateFormat constructor]";
524             delete dateFormat;
525             dateFormat = 0;
526             return fgStr;
527         }
528     }
529     fgStr.truncate(0);
530     dateFormat->format(d, fgStr);
531     return fgStr;
532 }
533 
534 /**
535  * Return a field of the given date
536  */
getField(UDate d,int32_t f)537 int32_t DateFormatRoundTripTest::getField(UDate d, int32_t f) {
538     // Should be synchronized, but we're single threaded so it's ok
539     UErrorCode status = U_ZERO_ERROR;
540     getFieldCal->setTime(d, status);
541     failure(status, "getfieldCal->setTime");
542     int32_t ret = getFieldCal->get((UCalendarDateFields)f, status);
543     failure(status, "getfieldCal->get");
544     return ret;
545 }
546 
escape(const UnicodeString & src,UnicodeString & dst)547 UnicodeString& DateFormatRoundTripTest::escape(const UnicodeString& src, UnicodeString& dst )
548 {
549     dst.remove();
550     for (int32_t i = 0; i < src.length(); ++i) {
551         UChar32 c = src.char32At(i);
552         if (c >= 0x10000) {
553             ++i;
554         }
555         if (c < 0x0080) {
556             dst += c;
557         } else {
558             dst += UnicodeString("[");
559             char buf [12];
560             sprintf(buf, "%#04x", c);
561             dst += UnicodeString(buf);
562             dst += UnicodeString("]");
563         }
564     }
565 
566     return dst;
567 }
568 
569 #define U_MILLIS_PER_YEAR (365.25 * 24 * 60 * 60 * 1000)
570 
generateDate(UDate minDate)571 UDate DateFormatRoundTripTest::generateDate(UDate minDate)
572 {
573   // Bring range in conformance to generateDate() below.
574   if(minDate < (U_MILLIS_PER_YEAR * -(4000-1970))) {
575     minDate = (U_MILLIS_PER_YEAR * -(4000-1970));
576   }
577   for(int i=0;i<8;i++) {
578     double a = randFraction();
579 
580     // Range from (min) to  (8000-1970) AD
581     double dateRange = (0.0 - minDate) + (U_MILLIS_PER_YEAR + (8000-1970));
582 
583     a *= dateRange;
584 
585     // Now offset from minDate
586     a += minDate;
587 
588     // Last sanity check
589     if(a>=minDate) {
590       return a;
591     }
592   }
593   return minDate;
594 }
595 
generateDate()596 UDate DateFormatRoundTripTest::generateDate()
597 {
598     double a = randFraction();
599 
600     // Now 'a' ranges from 0..1; scale it to range from 0 to 8000 years
601     a *= 8000;
602 
603     // Range from (4000-1970) BC to (8000-1970) AD
604     a -= 4000;
605 
606     // Now scale up to ms
607     a *= 365.25 * 24 * 60 * 60 * 1000;
608 
609     //return new Date((long)a);
610     return a;
611 }
612 
613 #endif /* #if !UCONFIG_NO_FORMATTING */
614 
615 //eof
616