tests/strings/vsnprintf.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/strings/vsnprintf.cpp
   3 // Purpose:     wxVsnprintf unit test
   4 // Author:      Francesco Montorsi
   5 //              (part of this file was taken from CMP.c of TRIO package
   6 //               written by Bjorn Reese and Daniel Stenberg)
   7 // Created:     2006-04-01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2006 Francesco Montorsi, Bjorn Reese and Daniel Stenberg
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ----------------------------------------------------------------------------
  13 // headers
  14 // ----------------------------------------------------------------------------
  15
  16 #include "testprec.h"
  17
  18 #ifdef __BORLANDC__
  19     #pragma hdrstop
  20 #endif
  21
  22 #include "wx/crt.h"
  23
  24 #if wxUSE_WXVSNPRINTF
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/wx.h"
  28     #include "wx/wxchar.h"
  29 #endif // WX_PRECOMP
  30
  31
  32 // NOTE: for more info about the specification of wxVsnprintf() behaviour you can
  33 //       refer to the following page of the GNU libc manual:
  34 //             http://www.gnu.org/software/libc/manual/html_node/Formatted-Output.html
  35
  36
  37
  38 // ----------------------------------------------------------------------------
  39 // global utilities for testing
  40 // ----------------------------------------------------------------------------
  41
  42 #define MAX_TEST_LEN        1024
  43
  44 // temporary buffers
  45 static wxChar buf[MAX_TEST_LEN];
  46 int r;
  47
  48 // these macros makes it possible to write all tests without repeating a lot
  49 // of times the wxT() macro
  50 // NOTE: you should use expected strings with these macros which do not exceed
  51 //       MAX_TEST_LEN as these macro do check if the return value is == (int)wxStrlen(buf)
  52
  53 #define ASSERT_STR_EQUAL( a, b ) \
  54     CPPUNIT_ASSERT_EQUAL( wxString(a), wxString(b) );
  55
  56 #define CMP5(expected, x, y, z, w)                    \
  57     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(x), y, z, w); \
  58     CPPUNIT_ASSERT( r == (int)wxStrlen(buf) );        \
  59     ASSERT_STR_EQUAL( wxT(expected), buf );
  60
  61 #define CMP4(expected, x, y, z)                     \
  62     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(x), y, z);  \
  63     CPPUNIT_ASSERT( r == (int)wxStrlen(buf) );      \
  64     ASSERT_STR_EQUAL( wxT(expected), buf );
  65
  66 #define CMP3(expected, x, y)                        \
  67     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(x), y);     \
  68     CPPUNIT_ASSERT( r == (int)wxStrlen(buf) );      \
  69     ASSERT_STR_EQUAL( wxT(expected), buf );
  70
  71 #define CMP2(expected, x)                           \
  72     r=wxSnprintf(buf, MAX_TEST_LEN, wxT(x));        \
  73     CPPUNIT_ASSERT( r == (int)wxStrlen(buf) );      \
  74     ASSERT_STR_EQUAL( wxT(expected), buf );
  75
  76 // NOTE: this macro is used also with too-small buffers (see Miscellaneous())
  77 //       test function, thus the return value can be > size and thus we
  78 //       cannot check if r == (int)wxStrlen(buf)
  79 #define CMPTOSIZE(buffer, size, expected, fmt, x, y, z, w)          \
  80     r=wxSnprintf(buffer, size, wxT(fmt), x, y, z, w);               \
  81     CPPUNIT_ASSERT( r > 0 );                                        \
  82     CPPUNIT_ASSERT_EQUAL( wxString(wxT(expected)).Left(size - 1),   \
  83                           wxString(buffer) )
  84
  85 // this is the same as wxSnprintf() but it passes the format string to
  86 // wxVsnprintf() without using ATTRIBUTE_PRINTF and thus suppresses the gcc
  87 // checks (and resulting warnings) for the format string
  88 //
  89 // use with extreme care and only when you're really sure the warnings must be
  90 // suppressed!
  91 template<typename T>
  92 static int
  93 wxUnsafeSnprintf(T *buf, size_t len, const wxChar *fmt, ...)
  94 {
  95     va_list args;
  96     va_start(args, fmt);
  97
  98     int rc = wxVsnprintf(buf, len, fmt, args);
  99
 100     va_end(args);
 101
 102     return rc;
 103 }
 104
 105 // ----------------------------------------------------------------------------
 106 // test class
 107 // ----------------------------------------------------------------------------
 108
 109 class VsnprintfTestCase : public CppUnit::TestCase
 110 {
 111 public:
 112     VsnprintfTestCase();
 113
 114 private:
 115     CPPUNIT_TEST_SUITE( VsnprintfTestCase );
 116         CPPUNIT_TEST( C );
 117         CPPUNIT_TEST( D );
 118         CPPUNIT_TEST( X );
 119         CPPUNIT_TEST( O );
 120         CPPUNIT_TEST( P );
 121         CPPUNIT_TEST( N );
 122         CPPUNIT_TEST( E );
 123         CPPUNIT_TEST( F );
 124         CPPUNIT_TEST( G );
 125         CPPUNIT_TEST( S );
 126         CPPUNIT_TEST( Asterisk );
 127         CPPUNIT_TEST( Percent );
 128 #ifdef wxLongLong_t
 129         CPPUNIT_TEST( LongLong );
 130 #endif
 131
 132         CPPUNIT_TEST( BigToSmallBuffer );
 133 #if wxUSE_WXVSNPRINTF
 134         CPPUNIT_TEST( WrongFormatStrings );
 135 #endif // wxUSE_WXVSNPRINTF
 136         CPPUNIT_TEST( Miscellaneous );
 137     CPPUNIT_TEST_SUITE_END();
 138
 139     void C();
 140     void D();
 141     void X();
 142     void O();
 143     void P();
 144     void N();
 145     void E();
 146     void F();
 147     void G();
 148     void S();
 149     void Asterisk();
 150     void Percent();
 151 #ifdef wxLongLong_t
 152     void LongLong();
 153 #endif
 154     void Unicode();
 155
 156     void BigToSmallBuffer();
 157 #if wxUSE_WXVSNPRINTF
 158     void WrongFormatStrings();
 159 #endif // wxUSE_WXVSNPRINTF
 160     void Miscellaneous();
 161     template<typename T> void Misc(T *buffer, int size);
 162
 163     // compares the expectedString and the result of wxVsnprintf() char by char
 164     // for all its lenght (not only for first expectedLen chars) and also
 165     // checks the return value
 166     void DoMisc(int expectedLen, const wxString& expectedString,
 167                 size_t max, const wxChar *format, ...);
 168
 169     DECLARE_NO_COPY_CLASS(VsnprintfTestCase)
 170 };
 171
 172 // register in the unnamed registry so that these tests are run by default
 173 CPPUNIT_TEST_SUITE_REGISTRATION( VsnprintfTestCase );
 174
 175 // also include in it's own registry so that these tests can be run alone
 176 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VsnprintfTestCase, "VsnprintfTestCase" );
 177
 178 VsnprintfTestCase::VsnprintfTestCase()
 179 {
 180     // this call is required to avoid check failures when running on machines
 181     // with a locale where the decimal point is not '.'
 182     wxSetlocale(LC_NUMERIC, "English");
 183 }
 184
 185 void VsnprintfTestCase::C()
 186 {
 187     CMP5("hi!", "%c%c%c", wxT('h'), wxT('i'), wxT('!'));
 188
 189     // NOTE:
 190     // the NULL characters _can_ be passed to %c to e.g. create strings
 191     // with embedded NULs (because strings are not always supposed to be
 192     // NUL-terminated).
 193
 194     DoMisc(14, wxT("Hello \0 World!"), 16, wxT("Hello %c World!"), wxT('\0'));
 195 }
 196
 197 void VsnprintfTestCase::D()
 198 {
 199     CMP3("+123456", "%+d", 123456);
 200     CMP3("-123456", "%d", -123456);
 201     CMP3(" 123456", "% d", 123456);
 202     CMP3("    123456", "%10d", 123456);
 203     CMP3("0000123456", "%010d", 123456);
 204     CMP3("-123456   ", "%-10d", -123456);
 205 }
 206
 207 void VsnprintfTestCase::X()
 208 {
 209     CMP3("ABCD", "%X", 0xABCD);
 210     CMP3("0XABCD", "%#X", 0xABCD);
 211     CMP3("0xabcd", "%#x", 0xABCD);
 212 }
 213
 214 void VsnprintfTestCase::O()
 215 {
 216     CMP3("1234567", "%o", 01234567);
 217     CMP3("01234567", "%#o", 01234567);
 218 }
 219
 220 void VsnprintfTestCase::P()
 221 {
 222     // WARNING: printing of pointers is not fully standard.
 223     //          GNU prints them as %#x except for NULL pointers which are
 224     //          printed as '(nil)'.
 225     //          MSVC always print them as %8X on 32 bit systems and as %16X
 226     //          on 64 bit systems
 227 #ifdef __VISUALC__
 228     #if SIZEOF_VOID_P == 4
 229         CMP3("00ABCDEF", "%p", (void*)0xABCDEF);
 230         CMP3("00000000", "%p", (void*)NULL);
 231     #elif SIZEOF_VOID_P == 8
 232         CMP3("0000ABCDEFABCDEF", "%p", (void*)0xABCDEFABCDEF);
 233         CMP3("0000000000000000", "%p", (void*)NULL);
 234     #endif
 235 #elif defined(__GNUG__)
 236     CMP3("0xabcdef", "%p", (void*)0xABCDEF);
 237     CMP3("(nil)", "%p", (void*)NULL);
 238 #endif
 239 }
 240
 241 void VsnprintfTestCase::N()
 242 {
 243     int nchar;
 244
 245     wxSnprintf(buf, MAX_TEST_LEN, _T("%d %s%n\n"), 3, _T("bears"), &nchar);
 246     CPPUNIT_ASSERT_EQUAL( 7, nchar );
 247 }
 248
 249 void VsnprintfTestCase::E()
 250 {
 251     // NB: there are no standards about the minimum exponent width
 252     //     (and the width of the %e conversion specifier refers to the
 253     //      mantissa, not to the exponent).
 254     //     Since newer MSVC versions use 3 digits as minimum exponent
 255     //     width while GNU libc uses 2 digits as minimum width, here we
 256     //     workaround this problem using for the exponent values with at
 257     //     least three digits.
 258     //     Some examples:
 259     //       printf("%e",2.342E+02);
 260     //     -> under MSVC7.1 prints:      2.342000e+002
 261     //     -> under GNU libc 2.4 prints: 2.342000e+02
 262     CMP3("2.342000e+112", "%e",2.342E+112);
 263     CMP3("-2.3420e-112", "%10.4e",-2.342E-112);
 264     CMP3("-2.3420e-112", "%11.4e",-2.342E-112);
 265     CMP3("   -2.3420e-112", "%15.4e",-2.342E-112);
 266
 267     CMP3("-0.02342", "%G",-2.342E-02);
 268     CMP3("3.1415E-116", "%G",3.1415e-116);
 269     CMP3("0003.141500e+103", "%016e", 3141.5e100);
 270     CMP3("   3.141500e+103", "%16e", 3141.5e100);
 271     CMP3("3.141500e+103   ", "%-16e", 3141.5e100);
 272     CMP3("3.142e+103", "%010.3e", 3141.5e100);
 273 }
 274
 275 void VsnprintfTestCase::F()
 276 {
 277     CMP3("3.300000", "%5f", 3.3);
 278     CMP3("3.000000", "%5f", 3.0);
 279     CMP3("0.000100", "%5f", .999999E-4);
 280     CMP3("0.000990", "%5f", .99E-3);
 281     CMP3("3333.000000", "%5f", 3333.0);
 282 }
 283
 284 void VsnprintfTestCase::G()
 285 {
 286     // NOTE: the same about E() testcase applies here...
 287
 288     CMP3("  3.3", "%5g", 3.3);
 289     CMP3("    3", "%5g", 3.0);
 290     CMP3("9.99999e-115", "%5g", .999999E-114);
 291     CMP3("0.00099", "%5g", .99E-3);
 292     CMP3(" 3333", "%5g", 3333.0);
 293     CMP3(" 0.01", "%5g", 0.01);
 294
 295     CMP3("    3", "%5.g", 3.3);
 296     CMP3("    3", "%5.g", 3.0);
 297     CMP3("1e-114", "%5.g", .999999E-114);
 298     CMP3("0.0001", "%5.g", 1.0E-4);
 299     CMP3("0.001", "%5.g", .99E-3);
 300     CMP3("3e+103", "%5.g", 3333.0E100);
 301     CMP3(" 0.01", "%5.g", 0.01);
 302
 303     CMP3("  3.3", "%5.2g", 3.3);
 304     CMP3("    3", "%5.2g", 3.0);
 305     CMP3("1e-114", "%5.2g", .999999E-114);
 306     CMP3("0.00099", "%5.2g", .99E-3);
 307     CMP3("3.3e+103", "%5.2g", 3333.0E100);
 308     CMP3(" 0.01", "%5.2g", 0.01);
 309 }
 310
 311 void VsnprintfTestCase::S()
 312 {
 313     CMP3("  abc", "%5s", wxT("abc"));
 314     CMP3("    a", "%5s", wxT("a"));
 315     CMP3("abcdefghi", "%5s", wxT("abcdefghi"));
 316     CMP3("abc  ", "%-5s", wxT("abc"));
 317     CMP3("abcdefghi", "%-5s", wxT("abcdefghi"));
 318
 319     CMP3("abcde", "%.5s", wxT("abcdefghi"));
 320
 321     // do the same tests but with Unicode characters:
 322 #if wxUSE_UNICODE && !defined(__VISUALC__) // FIXME: this doesn't compile with VC7
 323     #define ALPHA     "\x3B1"
 324     #define BETA      "\x3B2"
 325     #define GAMMA     "\x3B3"
 326     #define DELTA     "\x3B4"
 327     #define EPSILON   "\x3B5"
 328     #define ZETA      "\x3B6"
 329     #define ETA       "\x3B7"
 330     #define THETA     "\x3B8"
 331     #define IOTA      "\x3B9"
 332
 333     #define ABC         ALPHA BETA GAMMA
 334     #define ABCDE       ALPHA BETA GAMMA DELTA EPSILON
 335     #define ABCDEFGHI   ALPHA BETA GAMMA DELTA EPSILON ZETA ETA THETA IOTA
 336
 337     CMP3("  " ABC, "%5s", wxT(ABC));
 338     CMP3("    " ALPHA, "%5s", wxT(ALPHA));
 339     CMP3(ABCDEFGHI, "%5s", wxT(ABCDEFGHI));
 340     CMP3(ABC "  ", "%-5s", wxT(ABC));
 341     CMP3(ABCDEFGHI, "%-5s", wxT(ABCDEFGHI));
 342
 343     CMP3(ABCDE, "%.5s", wxT(ABCDEFGHI));
 344 #endif
 345
 346     // test a string which have the NULL character after "ab";
 347     // obviously it should be handled exactly like just as "ab"
 348     CMP3("   ab", "%5s", wxT("ab\0cdefghi"));
 349 }
 350
 351 void VsnprintfTestCase::Asterisk()
 352 {
 353     CMP5("       0.1", "%*.*f", 10, 1, 0.123);
 354     CMP5("    0.1230", "%*.*f", 10, 4, 0.123);
 355     CMP5("0.1", "%*.*f", 3, 1, 0.123);
 356
 357     CMP4("%0.002", "%%%.*f", 3, 0.0023456789);
 358 }
 359
 360 void VsnprintfTestCase::Percent()
 361 {
 362     // some tests without any argument passed through ...
 363     CMP2("%", "%%");
 364     CMP2("%%%", "%%%%%%");
 365
 366     CMP3("%  abc", "%%%5s", wxT("abc"));
 367     CMP3("%  abc%", "%%%5s%%", wxT("abc"));
 368
 369     // do not test odd number of '%' symbols as different implementations
 370     // of snprintf() give different outputs as this situation is not considered
 371     // by any standard (in fact, GCC will also warn you about a spurious % if
 372     // you write %%% as argument of some *printf function !)
 373     // Compare(wxT("%"), wxT("%%%"));
 374 }
 375
 376 #ifdef wxLongLong_t
 377 void VsnprintfTestCase::LongLong()
 378 {
 379     CMP3("123456789", "%lld", (wxLongLong_t)123456789);
 380     CMP3("-123456789", "%lld", (wxLongLong_t)-123456789);
 381
 382     CMP3("123456789", "%llu", (wxULongLong_t)123456789);
 383
 384 #ifdef __WXMSW__
 385     CMP3("123456789", "%I64d", (wxLongLong_t)123456789);
 386     CMP3("123456789abcdef", "%I64x", wxLL(0x123456789abcdef));
 387 #endif
 388 }
 389 #endif
 390
 391 template<typename T>
 392 void VsnprintfTestCase::Misc(T *buffer, int size)
 393 {
 394     // Remember that wx*printf could be mapped either to system
 395     // implementation or to wx implementation.
 396     // In the first case, when the output buffer is too small, the returned
 397     // value can be the number of characters required for the output buffer
 398     // (conforming to ISO C99; implemented in e.g. GNU libc >= 2.1), or
 399     // just a negative number, usually -1; (this is how e.g. MSVC's
 400     // *printf() behaves). Luckily, in all implementations, when the
 401     // output buffer is too small, it's nonetheless filled up to its max size.
 402     //
 403     // Note that in the second case (i.e. when we're using our own implementation),
 404     // wxVsnprintf() will return the number of characters written in the standard
 405     // output or
 406     //   -1         if there was an error in the format string
 407     //   maxSize+1  if the output buffer is too small
 408
 409     // test without positionals
 410     CMPTOSIZE(buffer, size, "123 444444444 - test - 555 -0.666",
 411               "%i %li - test - %d %.3f",
 412               123, (long int)444444444, 555, -0.666);
 413
 414 #if wxUSE_PRINTF_POS_PARAMS
 415     // test with positional
 416     CMPTOSIZE(buffer, size, "-0.666 123 - test - 444444444 555",
 417               "%4$.3f %1$i - test - %2$li %3$d",
 418               123, (long int)444444444, 555, -0.666);
 419 #endif
 420
 421     // test unicode/ansi conversion specifiers
 422     //
 423     // NB: we use wxUnsafeSnprintf() as %hs and %hc are invalid in printf
 424     //     format and gcc would warn about this otherwise
 425
 426     r = wxUnsafeSnprintf(buffer, size,
 427                          _T("unicode string: %ls %lc - ansi string: %hs %hc\n\n"),
 428                          L"unicode!!", L'W', "ansi!!", 'w');
 429     wxString expected =
 430         wxString(wxT("unicode string: unicode!! W - ansi string: ansi!! w\n\n")).Left(size - 1);
 431
 432     CPPUNIT_ASSERT( r != -1 );
 433     CPPUNIT_ASSERT_EQUAL(
 434         expected,
 435         wxString(buffer)
 436     );
 437 }
 438
 439
 440 // this test is only for our own implementation, the system implementation
 441 // doesn't always give errors for invalid format strings (e.g. glibc doesn't)
 442 // and as it's not required too (the behaviour is "undefined" according to the
 443 // spec), there is really no sense in testing for it (and the first 2 formats
 444 // in this test are not invalid at all in fact)
 445 #if wxUSE_WXVSNPRINTF
 446
 447 void VsnprintfTestCase::WrongFormatStrings()
 448 {
 449     // test how wxVsnprintf() behaves with wrong format string:
 450
 451 #if 0
 452     // NB: the next 2 tests currently return an error but it would be nice
 453     //     if they didn't (see ticket #9367)
 454
 455     // two positionals with the same index:
 456     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$s %1$s"), "hello");
 457     CPPUNIT_ASSERT(r != -1);
 458
 459     // three positionals with the same index mixed with other pos args:
 460     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%4$d %2$f %1$s %2$s %3$d"), "hello", "world", 3, 4);
 461     CPPUNIT_ASSERT(r != -1);
 462 #endif
 463
 464     // a missing positional arg: this should result in an error but not all
 465     // implementations detect it (e.g. glibc doesn't)
 466     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %3$d"), 1, 2, 3);
 467     CPPUNIT_ASSERT_EQUAL(-1, r);
 468
 469     // positional and non-positionals in the same format string:
 470     r = wxSnprintf(buf, MAX_TEST_LEN, wxT("%1$d %d %3$d"), 1, 2, 3);
 471     CPPUNIT_ASSERT_EQUAL(-1, r);
 472 }
 473
 474 #endif // wxUSE_WXVSNPRINTF
 475
 476 void VsnprintfTestCase::BigToSmallBuffer()
 477 {
 478     // VC6 can't compile this code
 479 #if !defined(__VISUALC__) || (__VISUALC__ >= 1310)
 480 #if wxUSE_UNICODE
 481     wchar_t bufw[1024], bufw2[16], bufw3[4], bufw4;
 482     Misc(bufw, 1024);
 483     Misc(bufw2, 16);
 484     Misc(bufw3, 4);
 485     Misc(&bufw4, 1);
 486 #endif // wxUSE_UNICODE
 487
 488     char bufa[1024], bufa2[16], bufa3[4], bufa4;
 489     Misc(bufa, 1024);
 490     Misc(bufa2, 16);
 491     Misc(bufa3, 4);
 492     Misc(&bufa4, 1);
 493 #endif // !VC6
 494 }
 495
 496 void VsnprintfTestCase::DoMisc(
 497         int expectedLen,
 498         const wxString& expectedString,
 499         size_t max,
 500         const wxChar *format, ...)
 501 {
 502     const size_t BUFSIZE = MAX_TEST_LEN - 1;
 503     size_t i;
 504     static int count = 0;
 505
 506     wxASSERT(max <= BUFSIZE);
 507
 508     for (i = 0; i < BUFSIZE; i++)
 509         buf[i] = '*';
 510     buf[BUFSIZE] = 0;
 511
 512     va_list ap;
 513     va_start(ap, format);
 514
 515     int n = wxVsnprintf(buf, max, format, ap);
 516
 517     va_end(ap);
 518
 519     // Prepare messages so that it is possible to see from the error which
 520     // test was running.
 521     wxString errStr, overflowStr;
 522     errStr << _T("No.: ") << ++count << _T(", expected: ") << expectedLen
 523            << _T(" '") << expectedString << _T("', result: ");
 524     overflowStr << errStr << _T("buffer overflow");
 525     errStr << n << _T(" '") << buf << _T("'");
 526
 527     // turn them into std::strings
 528     std::string errMsg(errStr.mb_str());
 529     std::string overflowMsg(overflowStr.mb_str());
 530
 531     CPPUNIT_ASSERT_MESSAGE(errMsg,
 532             (expectedLen == -1 && size_t(n) >= max) || expectedLen == n);
 533
 534     CPPUNIT_ASSERT_MESSAGE(errMsg, expectedString == buf);
 535
 536     for (i = max; i < BUFSIZE; i++)
 537         CPPUNIT_ASSERT_MESSAGE(overflowMsg, buf[i] == '*');
 538 }
 539
 540 void VsnprintfTestCase::Miscellaneous()
 541 {
 542     // expectedLen, expectedString, max, format, ...
 543     DoMisc(5, wxT("-1234"), 8, wxT("%d"), -1234);
 544     DoMisc(7, wxT("1234567"), 8,  wxT("%d"), 1234567);
 545     DoMisc(-1, wxT("1234567"), 8,  wxT("%d"), 12345678);
 546     DoMisc(-1, wxT("-123456"), 8,  wxT("%d"), -1234567890);
 547
 548     DoMisc(6, wxT("123456"), 8,  wxT("123456"));
 549     DoMisc(7, wxT("1234567"), 8,  wxT("1234567"));
 550     DoMisc(-1, wxT("1234567"), 8,  wxT("12345678"));
 551
 552     DoMisc(6, wxT("123450"), 8,  wxT("12345%d"), 0);
 553     DoMisc(7, wxT("1234560"), 8,  wxT("123456%d"), 0);
 554     DoMisc(-1, wxT("1234567"), 8,  wxT("1234567%d"), 0);
 555     DoMisc(-1, wxT("1234567"), 8,  wxT("12345678%d"), 0);
 556
 557     DoMisc(6, wxT("12%45%"), 8,  wxT("12%%45%%"));
 558     DoMisc(7, wxT("12%45%7"), 8,  wxT("12%%45%%7"));
 559     DoMisc(-1, wxT("12%45%7"), 8,  wxT("12%%45%%78"));
 560
 561     DoMisc(5, wxT("%%%%%"), 6,  wxT("%%%%%%%%%%"));
 562     DoMisc(6, wxT("%%%%12"), 7,  wxT("%%%%%%%%%d"), 12);
 563 }
 564
 565 #endif // wxUSE_WXVSNPRINTF