tests/strings/stdstrings.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/strings/stdstrings.cpp
   3 // Purpose:     wxString unit test
   4 // Author:      Vadim Zeitlin, Wlodzimierz ABX Skiba
   5 // Created:     2004-05-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2004 Vadim Zeitlin, Wlodzimierz Skiba
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/wx.h"
  22 #endif // WX_PRECOMP
  23
  24 // ----------------------------------------------------------------------------
  25 // test class
  26 // ----------------------------------------------------------------------------
  27
  28 class StdStringTestCase : public CppUnit::TestCase
  29 {
  30 public:
  31     StdStringTestCase();
  32
  33 private:
  34     CPPUNIT_TEST_SUITE( StdStringTestCase );
  35         CPPUNIT_TEST( StdConstructors );
  36         CPPUNIT_TEST( StdAppend );
  37         CPPUNIT_TEST( StdAssign );
  38         CPPUNIT_TEST( StdCompare );
  39         CPPUNIT_TEST( StdErase );
  40         CPPUNIT_TEST( StdFind );
  41         CPPUNIT_TEST( StdFindFirst );
  42         CPPUNIT_TEST( StdFindLast );
  43         CPPUNIT_TEST( StdInsert );
  44         CPPUNIT_TEST( StdReplace );
  45         CPPUNIT_TEST( StdRFind );
  46         CPPUNIT_TEST( StdResize );
  47         CPPUNIT_TEST( StdRiter );
  48         CPPUNIT_TEST( StdSubstr );
  49     CPPUNIT_TEST_SUITE_END();
  50
  51     void StdConstructors();
  52     void StdAppend();
  53     void StdAssign();
  54     void StdCompare();
  55     void StdErase();
  56     void StdFind();
  57     void StdFindFirst();
  58     void StdFindLast();
  59     void StdInsert();
  60     void StdReplace();
  61     void StdRFind();
  62     void StdResize();
  63     void StdRiter();
  64     void StdSubstr();
  65
  66     DECLARE_NO_COPY_CLASS(StdStringTestCase)
  67 };
  68
  69 // register in the unnamed registry so that these tests are run by default
  70 CPPUNIT_TEST_SUITE_REGISTRATION( StdStringTestCase );
  71
  72 // also include in it's own registry so that these tests can be run alone
  73 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( StdStringTestCase, "StdStringTestCase" );
  74
  75 StdStringTestCase::StdStringTestCase()
  76 {
  77 }
  78
  79 void StdStringTestCase::StdConstructors()
  80 {
  81     wxString s1(_T("abcdefgh")),
  82              s2(_T("abcdefghijklm"), 8),
  83              s3(_T("abcdefghijklm")),
  84              s4(8, _T('a'));
  85     wxString s5(s1),
  86              s6(s3, 0, 8),
  87              s7(s3.begin(), s3.begin() + 8);
  88     wxString s8(s1, 4, 8);
  89
  90     CPPUNIT_ASSERT( s1 == _T("abcdefgh") );
  91     CPPUNIT_ASSERT( s2 == s1 );
  92     CPPUNIT_ASSERT( s4 == _T("aaaaaaaa") );
  93     CPPUNIT_ASSERT( s5 == _T("abcdefgh") );
  94     CPPUNIT_ASSERT( s6 == s1 );
  95     CPPUNIT_ASSERT( s7 == s1 );
  96     CPPUNIT_ASSERT( s8 == _T("efgh") );
  97 }
  98
  99 void StdStringTestCase::StdAppend()
 100 {
 101     wxString s1, s2, s3, s4, s5, s6, s7, s8;
 102
 103     s1 = s2 = s3 = s4 = s5 = s6 = _T("abc");
 104     s1.append(_T("def"));
 105     s2.append(_T("defgh"), 3);
 106     s3.append(wxString(_T("abcdef")), 3, 6);
 107     s4.append(s1);
 108     s5.append(3, _T('a'));
 109     s6.append(s1.begin() + 3, s1.end());
 110
 111     CPPUNIT_ASSERT( s1 == _T("abcdef") );
 112     CPPUNIT_ASSERT( s2 == _T("abcdef") );
 113     CPPUNIT_ASSERT( s3 == _T("abcdef") );
 114     CPPUNIT_ASSERT( s4 == _T("abcabcdef") );
 115     CPPUNIT_ASSERT( s5 == _T("abcaaa") );
 116     CPPUNIT_ASSERT( s6 == _T("abcdef") );
 117
 118     s7 = s8 = wxString(_T("null\0time"), 9);
 119
 120     s7.append(_T("def"));
 121     s8.append(_T("defgh"), 3);
 122
 123     CPPUNIT_ASSERT( s7 == wxString(_T("null\0timedef"), 12) );
 124     CPPUNIT_ASSERT( s8 == wxString(_T("null\0timedef"), 12) );
 125 }
 126
 127 void StdStringTestCase::StdAssign()
 128 {
 129     wxString s1, s2, s3, s4, s5, s6, s7, s8;
 130
 131     s1 = s2 = s3 = s4 = s5 = s6 = s7 = s8 = _T("abc");
 132     s1.assign(_T("def"));
 133     s2.assign(_T("defgh"), 3);
 134     s3.assign(wxString(_T("abcdef")), 3, 6);
 135     s4.assign(s1);
 136     s5.assign(3, _T('a'));
 137     s6.assign(s1.begin() + 1, s1.end());
 138
 139     CPPUNIT_ASSERT( s1 == _T("def") );
 140     CPPUNIT_ASSERT( s2 == _T("def") );
 141     CPPUNIT_ASSERT( s3 == _T("def") );
 142     CPPUNIT_ASSERT( s4 == _T("def") );
 143     CPPUNIT_ASSERT( s5 == _T("aaa") );
 144     CPPUNIT_ASSERT( s6 == _T("ef") );
 145 }
 146
 147 void StdStringTestCase::StdCompare()
 148 {
 149     wxString s1, s2, s3, s4, s5, s6, s7, s8;
 150
 151     s1 = _T("abcdefgh");
 152     s2 = _T("abcdefgh");
 153     s3 = _T("abc");
 154     s4 = _T("abcdefghi");
 155     s5 = _T("aaa");
 156     s6 = _T("zzz");
 157
 158     CPPUNIT_ASSERT( s1.compare(s2) == 0 );
 159     CPPUNIT_ASSERT( s1.compare(s3) > 0 );
 160     CPPUNIT_ASSERT( s1.compare(s4) < 0 );
 161     CPPUNIT_ASSERT( s1.compare(s5) > 0 );
 162     CPPUNIT_ASSERT( s1.compare(s6) < 0 );
 163     CPPUNIT_ASSERT( s1.compare(1, 12, s1) > 0);
 164     CPPUNIT_ASSERT( s1.compare(_T("abcdefgh")) == 0);
 165     CPPUNIT_ASSERT( s1.compare(1, 7, _T("bcdefgh")) == 0);
 166     CPPUNIT_ASSERT( s1.compare(1, 7, _T("bcdefgh"), 7) == 0);
 167 }
 168
 169 void StdStringTestCase::StdErase()
 170 {
 171     wxString s1, s2, s3, s4, s5, s6, s7;
 172
 173     s1 = _T("abcdefgh");
 174     s2 = _T("abcdefgh");
 175     s3 = _T("abc");
 176     s4 = _T("abcdefghi");
 177     s5 = _T("aaa");
 178     s6 = _T("zzz");
 179     s7 = _T("zabcdefg");
 180
 181     s1.erase(1, 1);
 182     s2.erase(4, 12);
 183     wxString::iterator it = s3.erase(s3.begin() + 1);
 184     wxString::iterator it2 = s4.erase(s4.begin() + 4, s4.begin() + 6);
 185     wxString::iterator it3 = s7.erase(s7.begin() + 4, s7.begin() + 8);
 186
 187     CPPUNIT_ASSERT( s1 == _T("acdefgh") );
 188     CPPUNIT_ASSERT( s2 == _T("abcd") );
 189     CPPUNIT_ASSERT( s3 == _T("ac") );
 190     CPPUNIT_ASSERT( s4 == _T("abcdghi") );
 191     CPPUNIT_ASSERT( s7 == _T("zabc") );
 192     CPPUNIT_ASSERT( *it == _T('c') );
 193     CPPUNIT_ASSERT( *it2 == _T('g') );
 194     CPPUNIT_ASSERT( it3 == s7.end() );
 195 }
 196
 197 void StdStringTestCase::StdFind()
 198 {
 199     //                0         1         2
 200     //                01234567890123456789012345
 201     wxString s1 = _T("abcdefgABCDEFGabcABCabcABC");
 202     wxString s2 = _T("gAB");
 203
 204     CPPUNIT_ASSERT( s1.find(_T('A')) == 7u );
 205     CPPUNIT_ASSERT( s1.find(_T('A'), 7) == 7u );
 206     CPPUNIT_ASSERT( s1.find(_T('Z')) == wxString::npos );
 207     CPPUNIT_ASSERT( s1.find(_T('C'), 22) == 25u );
 208
 209     CPPUNIT_ASSERT( s1.find(_T("gAB")) == 6u );
 210     CPPUNIT_ASSERT( s1.find(_T("gAB"), 7) == wxString::npos );
 211     CPPUNIT_ASSERT( s1.find(_T("gAB"), 6) == 6u );
 212
 213     CPPUNIT_ASSERT( s1.find(_T("gABZZZ"), 2, 3) == 6u );
 214     CPPUNIT_ASSERT( s1.find(_T("gABZZZ"), 7, 3) == wxString::npos );
 215
 216     CPPUNIT_ASSERT( s1.find(s2) == 6u );
 217     CPPUNIT_ASSERT( s1.find(s2, 7) == wxString::npos );
 218     CPPUNIT_ASSERT( s1.find(s2, 6) == 6u );
 219
 220     //                   0          1          2
 221     //                   0123456 78901234567 8901234567
 222     //wxString _s1 = _T("abcdefg\0ABCDEFGabc\0ABCabcABC");
 223     //wxString _s2 = _T("g\0AB");
 224     wxString _s1 = _T("abcdefgABCDEFGabcABCabcABC");
 225     wxString _s2 = _T("gAB");
 226
 227     _s1.insert(7, 1, '\0');
 228     _s1.insert(18, 1, '\0');
 229     _s2.insert(1, 1, '\0');
 230
 231     CPPUNIT_ASSERT( _s1.find(_T('A')) == 8u );
 232     CPPUNIT_ASSERT( _s1.find(_T('A'), 8) == 8u );
 233     CPPUNIT_ASSERT( _s1.find(_T('Z')) == wxString::npos );
 234     CPPUNIT_ASSERT( _s1.find(_T('C'), 22) == 27u );
 235
 236     CPPUNIT_ASSERT( _s1.find(_T("AB")) == 8u );
 237     CPPUNIT_ASSERT( _s1.find(_T("AB"), 26) == wxString::npos );
 238     CPPUNIT_ASSERT( _s1.find(_T("AB"), 23) == 25u );
 239
 240     CPPUNIT_ASSERT( _s1.find(_T("ABZZZ"), 2, 2) == 8u );
 241     CPPUNIT_ASSERT( _s1.find(_T("ABZZZ"), 26, 2) == wxString::npos );
 242
 243     CPPUNIT_ASSERT( _s1.find(_s2) == 6u );
 244     CPPUNIT_ASSERT( _s1.find(_s2, 7) == wxString::npos );
 245     CPPUNIT_ASSERT( _s1.find(_s2, 6) == 6u );
 246 }
 247
 248 void StdStringTestCase::StdFindFirst()
 249 {
 250     //                0         1         2         3
 251     //                01234567890123456789012345678901234
 252     wxString s1 = _T("aaaaaabcdefghlkjiaaaaaabcdbcdbcdbcd");
 253     wxString s2 = _T("aaaaaa");
 254
 255     CPPUNIT_ASSERT( s1.find_first_not_of(_T('a')) == 6u );
 256     CPPUNIT_ASSERT( s1.find_first_not_of(_T('a'), 7) == 7u );
 257     CPPUNIT_ASSERT( s2.find_first_not_of(_T('a')) == wxString::npos );
 258
 259     CPPUNIT_ASSERT( s1.find_first_not_of(_T("abde"), 4) == 7u );
 260     CPPUNIT_ASSERT( s1.find_first_not_of(_T("abde"), 7) == 7u );
 261     CPPUNIT_ASSERT( s1.find_first_not_of(_T("abcdefghijkl")) == wxString::npos );
 262
 263     CPPUNIT_ASSERT( s1.find_first_not_of(_T("abcdefghi"), 0, 4) == 9u );
 264
 265     CPPUNIT_ASSERT( s1.find_first_of(_T('c')) == 7u );
 266     CPPUNIT_ASSERT( s1.find_first_of(_T('v')) == wxString::npos );
 267     CPPUNIT_ASSERT( s1.find_first_of(_T('c'), 10) == 24u );
 268
 269     CPPUNIT_ASSERT( s1.find_first_of(_T("ijkl")) == 13u );
 270     CPPUNIT_ASSERT( s1.find_first_of(_T("ddcfg"), 17) == 24u );
 271     CPPUNIT_ASSERT( s1.find_first_of(_T("ddcfga"), 17, 5) == 24u );
 272 }
 273
 274 void StdStringTestCase::StdFindLast()
 275 {
 276     //                0         1         2         3
 277     //                01234567890123456789012345678901234
 278     wxString s1 = _T("aaaaaabcdefghlkjiaaaaaabcdbcdbcdbcd");
 279     wxString s2 = _T("aaaaaa");
 280
 281     CPPUNIT_ASSERT( s2.find_last_not_of(_T('a')) == wxString::npos );
 282     CPPUNIT_ASSERT( s1.find_last_not_of(_T('d')) == 33u );
 283     CPPUNIT_ASSERT( s1.find_last_not_of(_T('d'), 25) == 24u );
 284
 285     CPPUNIT_ASSERT( s1.find_last_not_of(_T("bcd")) == 22u );
 286     CPPUNIT_ASSERT( s1.find_last_not_of(_T("abc"), 24) == 16u );
 287
 288     CPPUNIT_ASSERT( s1.find_last_not_of(_T("abcdefghijklmnopqrstuv"), 24, 3) == 16u );
 289
 290     CPPUNIT_ASSERT( s2.find_last_of(_T('c')) == wxString::npos );
 291     CPPUNIT_ASSERT( s1.find_last_of(_T('a')) == 22u );
 292     CPPUNIT_ASSERT( s1.find_last_of(_T('b'), 24) == 23u );
 293
 294     CPPUNIT_ASSERT( s1.find_last_of(_T("ijklm")) == 16u );
 295     CPPUNIT_ASSERT( s1.find_last_of(_T("ijklma"), 33, 4) == 16u );
 296     CPPUNIT_ASSERT( s1.find_last_of(_T("a"), 17) == 17u );
 297
 298
 299
 300     //                  0          1          2         3
 301     //                  012345 67890123456789 01234567890123456
 302 //    wxString s1 = _T("aaaaaa\0bcdefghlkjiaa\0aaaabcdbcdbcdbcd");
 303 //    wxString s2 = _T("aaaaaa\0");
 304     s1.insert(6,1,'\0');
 305     s1.insert(20,1,'\0');
 306     s2.insert(6,1,'\0');
 307
 308     CPPUNIT_ASSERT( s2.find_last_not_of(_T('a')) == 6u );
 309     CPPUNIT_ASSERT( s1.find_last_not_of(_T('d')) == 35u );
 310     CPPUNIT_ASSERT( s1.find_last_not_of(_T('d'), 27) == 26u );
 311
 312     CPPUNIT_ASSERT( s1.find_last_not_of(_T("bcd")) == 24u );
 313     CPPUNIT_ASSERT( s1.find_last_not_of(_T("abc"), 26) == 20u );
 314
 315     CPPUNIT_ASSERT( s1.find_last_not_of(_T("abcdefghijklmnopqrstuv"), 26, 3) == 20u );
 316
 317     CPPUNIT_ASSERT( s2.find_last_of(_T('c')) == wxString::npos );
 318     CPPUNIT_ASSERT( s1.find_last_of(_T('a')) == 24u );
 319     CPPUNIT_ASSERT( s1.find_last_of(_T('b'), 26) == 25u );
 320
 321     CPPUNIT_ASSERT( s1.find_last_of(_T("ijklm")) == 17u );
 322     CPPUNIT_ASSERT( s1.find_last_of(_T("ijklma"), 35, 4) == 17u );
 323     CPPUNIT_ASSERT( s1.find_last_of(_T("a"), 18) == 18u );
 324 }
 325
 326 void StdStringTestCase::StdInsert()
 327 {
 328     wxString s1, s2, s3, s4, s5, s6, s7, s8, s9, s10;
 329
 330     s1 = s2 = s3 = s4 = s5 = s6 = s7 = s8 = _T("aaaa");
 331     s9 = s10 = _T("cdefg");
 332
 333     s1.insert(1, _T("cc") );
 334     s2.insert(2, _T("cdef"), 3);
 335     s3.insert(2, s10);
 336     s4.insert(2, s10, 3, 7);
 337     s5.insert(1, 2, _T('c'));
 338     s6.insert(s6.begin() + 3, _T('X'));
 339     s7.insert(s7.begin(), s9.begin(), s9.end() - 1);
 340     s8.insert(s8.begin(), 2, _T('c'));
 341
 342     CPPUNIT_ASSERT( s1 == _T("accaaa") );
 343     CPPUNIT_ASSERT( s2 == _T("aacdeaa") );
 344     CPPUNIT_ASSERT( s3 == _T("aacdefgaa") );
 345     CPPUNIT_ASSERT( s4 == _T("aafgaa") );
 346     CPPUNIT_ASSERT( s5 == _T("accaaa") );
 347     CPPUNIT_ASSERT( s6 == _T("aaaXa") );
 348     CPPUNIT_ASSERT( s7 == _T("cdefaaaa") );
 349     CPPUNIT_ASSERT( s8 == _T("ccaaaa") );
 350
 351     s1 = s2 = s3 = _T("aaaa");
 352     s1.insert(0, _T("ccc"), 2);
 353     s2.insert(4, _T("ccc"), 2);
 354
 355     CPPUNIT_ASSERT( s1 == _T("ccaaaa") );
 356     CPPUNIT_ASSERT( s2 == _T("aaaacc") );
 357 }
 358
 359 void StdStringTestCase::StdReplace()
 360 {
 361     wxString s1, s2, s3, s4, s5, s6, s7, s8, s9;
 362
 363     s1 = s2 = s3 = s4 = s5 = s6 = s7 = s8 = _T("QWERTYUIOP");
 364     s9 = _T("werty");
 365
 366     s1.replace(3, 4, _T("rtyu"));
 367     s1.replace(8, 7, _T("opopop"));
 368     s2.replace(10, 12, _T("WWWW"));
 369     s3.replace(1, 5, s9);
 370     s4.replace(1, 4, s9, 0, 4);
 371     s5.replace(1, 2, s9, 1, 12);
 372     s6.replace(0, 123, s9, 0, 123);
 373     s7.replace(2, 7, s9);
 374
 375     CPPUNIT_ASSERT( s1 == _T("QWErtyuIopopop") );
 376     CPPUNIT_ASSERT( s2 == _T("QWERTYUIOPWWWW") );
 377     CPPUNIT_ASSERT( s3 == _T("QwertyUIOP") );
 378     CPPUNIT_ASSERT( s4 == _T("QwertYUIOP") );
 379     CPPUNIT_ASSERT( s5 == _T("QertyRTYUIOP") );
 380     CPPUNIT_ASSERT( s6 == s9);
 381     CPPUNIT_ASSERT( s7 == _T("QWwertyP") );
 382 }
 383
 384 void StdStringTestCase::StdRFind()
 385 {
 386     //                0         1         2
 387     //                01234567890123456789012345
 388     wxString s1 = _T("abcdefgABCDEFGabcABCabcABC");
 389     wxString s2 = _T("gAB");
 390     wxString s3 = _T("ab");
 391
 392     CPPUNIT_ASSERT( s1.rfind(_T('A')) == 23u );
 393     CPPUNIT_ASSERT( s1.rfind(_T('A'), 7) == 7u );
 394     CPPUNIT_ASSERT( s1.rfind(_T('Z')) == wxString::npos );
 395     CPPUNIT_ASSERT( s1.rfind(_T('C'), 22) == 19u );
 396
 397     CPPUNIT_ASSERT( s1.rfind(_T("cAB")) == 22u );
 398     CPPUNIT_ASSERT( s1.rfind(_T("cAB"), 15) == wxString::npos );
 399     CPPUNIT_ASSERT( s1.rfind(_T("cAB"), 21) == 16u );
 400
 401     CPPUNIT_ASSERT( s1.rfind(_T("gABZZZ"), 7, 3) == 6u );
 402     CPPUNIT_ASSERT( s1.rfind(_T("gABZZZ"), 5, 3) == wxString::npos );
 403
 404     CPPUNIT_ASSERT( s1.rfind(s2) == 6u );
 405     CPPUNIT_ASSERT( s1.rfind(s2, 5) == wxString::npos );
 406     CPPUNIT_ASSERT( s1.rfind(s2, 6) == 6u );
 407     CPPUNIT_ASSERT( s1.rfind(s3, 1) == 0u );
 408
 409
 410     //                  0          1          2
 411     //                  01234 56789012 345678901234567
 412 //    wxString s1 = _T("abcde\0fgABCDE\0FGabcABCabcABC");
 413 //    wxString s2 = _T("gAB");
 414 //    wxString s3 = _T("ab");
 415
 416     s1.insert(5,1,'\0');
 417     s1.insert(13,1,'\0');
 418
 419     CPPUNIT_ASSERT( s1.rfind(_T('A')) == 25u );
 420     CPPUNIT_ASSERT( s1.rfind(_T('A'), 8) == 8u );
 421     CPPUNIT_ASSERT( s1.rfind(_T('Z')) == wxString::npos );
 422     CPPUNIT_ASSERT( s1.rfind(_T('C'), 22) == 21u );
 423
 424     CPPUNIT_ASSERT( s1.rfind(_T("cAB")) == 24u );
 425     CPPUNIT_ASSERT( s1.rfind(_T("cAB"), 15) == wxString::npos );
 426     CPPUNIT_ASSERT( s1.rfind(_T("cAB"), 21) == 18u );
 427
 428     CPPUNIT_ASSERT( s1.rfind(_T("gABZZZ"), 8, 3) == 7u );
 429     CPPUNIT_ASSERT( s1.rfind(_T("gABZZZ"), 5, 3) == wxString::npos );
 430 }
 431
 432 void StdStringTestCase::StdResize()
 433 {
 434     wxString s1, s2, s3, s4;
 435
 436     s1 = s2 = s3 = s4 = _T("abcABCdefDEF");
 437
 438     s1.resize( 12 );
 439     s2.resize( 10 );
 440     s3.resize( 14, _T(' ') );
 441     s4.resize( 14, _T('W') );
 442
 443     CPPUNIT_ASSERT( s1 == _T("abcABCdefDEF") );
 444     CPPUNIT_ASSERT( s2 == _T("abcABCdefD") );
 445     CPPUNIT_ASSERT( s3 == _T("abcABCdefDEF  ") );
 446     CPPUNIT_ASSERT( s4 == _T("abcABCdefDEFWW") );
 447 }
 448
 449 void StdStringTestCase::StdRiter()
 450 {
 451     const wxString s(_T("fozbar"));
 452
 453     wxString::const_reverse_iterator ri(s.rbegin());
 454     CPPUNIT_ASSERT( _T('r') == *ri );
 455     CPPUNIT_ASSERT( _T('a') == *++ri );
 456     CPPUNIT_ASSERT( _T('r') == *--ri );
 457
 458     ri = s.rend();
 459     ri--;
 460     CPPUNIT_ASSERT( _T('f') == *ri );
 461
 462     --ri;
 463     CPPUNIT_ASSERT( _T('o') == *ri );
 464
 465     wxString::const_iterator i = ri.base();
 466     CPPUNIT_ASSERT( _T('z') == *i );
 467 }
 468
 469 void StdStringTestCase::StdSubstr()
 470 {
 471     wxString s1 = _T("abcdefgABCDEFG");
 472
 473     CPPUNIT_ASSERT( s1.substr( 0, 14 ) == s1 );
 474     CPPUNIT_ASSERT( s1.substr( 1, 13 ) == _T("bcdefgABCDEFG") );
 475     CPPUNIT_ASSERT( s1.substr( 1, 20 ) == _T("bcdefgABCDEFG") );
 476     CPPUNIT_ASSERT( s1.substr( 14, 30 ) == _T("") );
 477
 478     s1.insert(3,1,'\0');
 479     s1.insert(8,1,'\0');
 480     s1.insert(13,1,'\0');
 481
 482     wxString s2 = wxT("bcdefgABCDEFG");
 483     s2.insert(2,1,'\0');
 484     s2.insert(7,1,'\0');
 485     s2.insert(12,1,'\0');
 486
 487     CPPUNIT_ASSERT( s1.substr( 0, 17 ) == s1 );
 488     CPPUNIT_ASSERT( s1.substr( 1, 17 ) == s2 );
 489     CPPUNIT_ASSERT( s1.substr( 1, 20 ) == s2 );
 490     CPPUNIT_ASSERT( s1.substr( 17, 30 ) == _T("") );
 491 }
 492