tests/strings/strings.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/strings/strings.cpp
   3 // Purpose:     wxString unit test
   4 // Author:      Vadim Zeitlin, Wlodzimierz ABX Skiba
   5 // Created:     2004-04-19
   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 StringTestCase : public CppUnit::TestCase
  29 {
  30 public:
  31     StringTestCase();
  32
  33 private:
  34     CPPUNIT_TEST_SUITE( StringTestCase );
  35         CPPUNIT_TEST( String );
  36         CPPUNIT_TEST( PChar );
  37         CPPUNIT_TEST( Format );
  38         CPPUNIT_TEST( Constructors );
  39         CPPUNIT_TEST( StaticConstructors );
  40         CPPUNIT_TEST( Extraction );
  41         CPPUNIT_TEST( Trim );
  42         CPPUNIT_TEST( Find );
  43         CPPUNIT_TEST( Replace );
  44         CPPUNIT_TEST( Match );
  45         CPPUNIT_TEST( CaseChanges );
  46         CPPUNIT_TEST( Compare );
  47         CPPUNIT_TEST( CompareNoCase );
  48         CPPUNIT_TEST( Contains );
  49         CPPUNIT_TEST( ToLong );
  50         CPPUNIT_TEST( ToULong );
  51 #ifdef wxLongLong_t
  52         CPPUNIT_TEST( ToLongLong );
  53         CPPUNIT_TEST( ToULongLong );
  54 #endif // wxLongLong_t
  55         CPPUNIT_TEST( ToDouble );
  56         CPPUNIT_TEST( FromDouble );
  57         CPPUNIT_TEST( StringBuf );
  58         CPPUNIT_TEST( UTF8Buf );
  59         CPPUNIT_TEST( CStrDataTernaryOperator );
  60         CPPUNIT_TEST( CStrDataOperators );
  61         CPPUNIT_TEST( CStrDataImplicitConversion );
  62         CPPUNIT_TEST( ExplicitConversion );
  63         CPPUNIT_TEST( IndexedAccess );
  64         CPPUNIT_TEST( BeforeAndAfter );
  65         CPPUNIT_TEST( ScopedBuffers );
  66     CPPUNIT_TEST_SUITE_END();
  67
  68     void String();
  69     void PChar();
  70     void Format();
  71     void Constructors();
  72     void StaticConstructors();
  73     void Extraction();
  74     void Trim();
  75     void Find();
  76     void Replace();
  77     void Match();
  78     void CaseChanges();
  79     void Compare();
  80     void CompareNoCase();
  81     void Contains();
  82     void ToLong();
  83     void ToULong();
  84 #ifdef wxLongLong_t
  85     void ToLongLong();
  86     void ToULongLong();
  87 #endif // wxLongLong_t
  88     void ToDouble();
  89     void FromDouble();
  90     void StringBuf();
  91     void UTF8Buf();
  92     void CStrDataTernaryOperator();
  93     void DoCStrDataTernaryOperator(bool cond);
  94     void CStrDataOperators();
  95     void CStrDataImplicitConversion();
  96     void ExplicitConversion();
  97     void IndexedAccess();
  98     void BeforeAndAfter();
  99     void ScopedBuffers();
 100
 101     DECLARE_NO_COPY_CLASS(StringTestCase)
 102 };
 103
 104 // register in the unnamed registry so that these tests are run by default
 105 CPPUNIT_TEST_SUITE_REGISTRATION( StringTestCase );
 106
 107 // also include in its own registry so that these tests can be run alone
 108 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( StringTestCase, "StringTestCase" );
 109
 110 StringTestCase::StringTestCase()
 111 {
 112 }
 113
 114 void StringTestCase::String()
 115 {
 116     wxString a, b, c;
 117
 118     a.reserve (128);
 119     b.reserve (128);
 120     c.reserve (128);
 121
 122     for (int i = 0; i < 2; ++i)
 123     {
 124         a = wxT("Hello");
 125         b = wxT(" world");
 126         c = wxT("! How'ya doin'?");
 127         a += b;
 128         a += c;
 129         c = wxT("Hello world! What's up?");
 130         CPPUNIT_ASSERT( c != a );
 131     }
 132 }
 133
 134 void StringTestCase::PChar()
 135 {
 136     wxChar a [128];
 137     wxChar b [128];
 138     wxChar c [128];
 139
 140     for (int i = 0; i < 2; ++i)
 141     {
 142         wxStrcpy (a, wxT("Hello"));
 143         wxStrcpy (b, wxT(" world"));
 144         wxStrcpy (c, wxT("! How'ya doin'?"));
 145         wxStrcat (a, b);
 146         wxStrcat (a, c);
 147         wxStrcpy (c, wxT("Hello world! What's up?"));
 148         CPPUNIT_ASSERT( wxStrcmp (c, a) != 0 );
 149     }
 150 }
 151
 152 void StringTestCase::Format()
 153 {
 154     wxString s1,s2;
 155     s1.Printf(wxT("%03d"), 18);
 156     CPPUNIT_ASSERT( s1 == wxString::Format(wxT("%03d"), 18) );
 157     s2.Printf(wxT("Number 18: %s\n"), s1.c_str());
 158     CPPUNIT_ASSERT( s2 == wxString::Format(wxT("Number 18: %s\n"), s1.c_str()) );
 159
 160     static const size_t lengths[] = { 1, 512, 1024, 1025, 2048, 4096, 4097 };
 161     for ( size_t n = 0; n < WXSIZEOF(lengths); n++ )
 162     {
 163         const size_t len = lengths[n];
 164
 165         wxString s(wxT('Z'), len);
 166         CPPUNIT_ASSERT_EQUAL( len, wxString::Format(wxT("%s"), s.c_str()).length());
 167     }
 168
 169
 170     CPPUNIT_ASSERT_EQUAL
 171     (
 172         "two one",
 173         wxString::Format(wxT("%2$s %1$s"), wxT("one"), wxT("two"))
 174     );
 175 }
 176
 177 void StringTestCase::Constructors()
 178 {
 179     CPPUNIT_ASSERT_EQUAL( "", wxString('Z', 0) );
 180     CPPUNIT_ASSERT_EQUAL( "Z", wxString('Z') );
 181     CPPUNIT_ASSERT_EQUAL( "ZZZZ", wxString('Z', 4) );
 182     CPPUNIT_ASSERT_EQUAL( "Hell", wxString("Hello", 4) );
 183     CPPUNIT_ASSERT_EQUAL( "Hello", wxString("Hello", 5) );
 184
 185 #if wxUSE_UNICODE
 186     CPPUNIT_ASSERT_EQUAL( L"", wxString(L'Z', 0) );
 187     CPPUNIT_ASSERT_EQUAL( L"Z", wxString(L'Z') );
 188     CPPUNIT_ASSERT_EQUAL( L"ZZZZ", wxString(L'Z', 4) );
 189     CPPUNIT_ASSERT_EQUAL( L"Hell", wxString(L"Hello", 4) );
 190     CPPUNIT_ASSERT_EQUAL( L"Hello", wxString(L"Hello", 5) );
 191 #endif // wxUSE_UNICODE
 192
 193     CPPUNIT_ASSERT_EQUAL( 0, wxString(wxString(), 17).length() );
 194
 195     // This string has 3 characters (<h>, <e'> and <l>), not 4!
 196     wxString s3("h\xc3\xa9llo", 4);
 197     CPPUNIT_ASSERT_EQUAL( 3, s3.length() );
 198     CPPUNIT_ASSERT_EQUAL( 'l', (char)s3[2] );
 199
 200
 201     static const char *s = "?really!";
 202     const char *start = wxStrchr(s, 'r');
 203     const char *end = wxStrchr(s, '!');
 204     CPPUNIT_ASSERT_EQUAL( "really", wxString(start, end) );
 205
 206     // test if creating string from NULL C pointer works:
 207     CPPUNIT_ASSERT_EQUAL( "", wxString((const char *)NULL) );
 208 }
 209
 210 void StringTestCase::StaticConstructors()
 211 {
 212     CPPUNIT_ASSERT_EQUAL( "", wxString::FromAscii("") );
 213     CPPUNIT_ASSERT_EQUAL( "", wxString::FromAscii("Hello", 0) );
 214     CPPUNIT_ASSERT_EQUAL( "Hell", wxString::FromAscii("Hello", 4) );
 215     CPPUNIT_ASSERT_EQUAL( "Hello", wxString::FromAscii("Hello", 5) );
 216     CPPUNIT_ASSERT_EQUAL( "Hello", wxString::FromAscii("Hello") );
 217
 218     // FIXME: this doesn't work currently but should!
 219     //CPPUNIT_ASSERT_EQUAL( 1, wxString::FromAscii("", 1).length() );
 220
 221
 222     CPPUNIT_ASSERT_EQUAL( "", wxString::FromUTF8("") );
 223     CPPUNIT_ASSERT_EQUAL( "", wxString::FromUTF8("Hello", 0) );
 224     CPPUNIT_ASSERT_EQUAL( "Hell", wxString::FromUTF8("Hello", 4) );
 225     CPPUNIT_ASSERT_EQUAL( "Hello", wxString::FromUTF8("Hello", 5) );
 226     CPPUNIT_ASSERT_EQUAL( "Hello", wxString::FromUTF8("Hello") );
 227
 228     CPPUNIT_ASSERT_EQUAL( 2, wxString::FromUTF8("h\xc3\xa9llo", 3).length() );
 229
 230
 231     //CPPUNIT_ASSERT_EQUAL( 1, wxString::FromUTF8("", 1).length() );
 232 }
 233
 234 void StringTestCase::Extraction()
 235 {
 236     wxString s(wxT("Hello, world!"));
 237
 238     CPPUNIT_ASSERT( wxStrcmp( s.c_str() , wxT("Hello, world!") ) == 0 );
 239     CPPUNIT_ASSERT( wxStrcmp( s.Left(5).c_str() , wxT("Hello") ) == 0 );
 240     CPPUNIT_ASSERT( wxStrcmp( s.Right(6).c_str() , wxT("world!") ) == 0 );
 241     CPPUNIT_ASSERT( wxStrcmp( s(3, 5).c_str() , wxT("lo, w") ) == 0 );
 242     CPPUNIT_ASSERT( wxStrcmp( s.Mid(3).c_str() , wxT("lo, world!") ) == 0 );
 243     CPPUNIT_ASSERT( wxStrcmp( s.substr(3, 5).c_str() , wxT("lo, w") ) == 0 );
 244     CPPUNIT_ASSERT( wxStrcmp( s.substr(3).c_str() , wxT("lo, world!") ) == 0 );
 245
 246 #if wxUSE_UNICODE
 247     static const char *germanUTF8 = "Oberfl\303\244che";
 248     wxString strUnicode(wxString::FromUTF8(germanUTF8));
 249
 250     CPPUNIT_ASSERT( strUnicode.Mid(0, 10) == strUnicode );
 251     CPPUNIT_ASSERT( strUnicode.Mid(7, 2) == "ch" );
 252 #endif // wxUSE_UNICODE
 253
 254     wxString rest;
 255
 256     #define TEST_STARTS_WITH(prefix, correct_rest, result)                    \
 257         CPPUNIT_ASSERT_EQUAL(result, s.StartsWith(prefix, &rest));            \
 258         if ( result )                                                         \
 259             CPPUNIT_ASSERT_EQUAL(correct_rest, rest)
 260
 261     TEST_STARTS_WITH( wxT("Hello"),           wxT(", world!"),      true  );
 262     TEST_STARTS_WITH( wxT("Hello, "),         wxT("world!"),        true  );
 263     TEST_STARTS_WITH( wxT("Hello, world!"),   wxT(""),              true  );
 264     TEST_STARTS_WITH( wxT("Hello, world!!!"), wxT(""),              false );
 265     TEST_STARTS_WITH( wxT(""),                wxT("Hello, world!"), true  );
 266     TEST_STARTS_WITH( wxT("Goodbye"),         wxT(""),              false );
 267     TEST_STARTS_WITH( wxT("Hi"),              wxT(""),              false );
 268
 269     #undef TEST_STARTS_WITH
 270
 271     rest = "Hello world";
 272     CPPUNIT_ASSERT( rest.StartsWith("Hello ", &rest) );
 273     CPPUNIT_ASSERT_EQUAL("world", rest);
 274
 275     #define TEST_ENDS_WITH(suffix, correct_rest, result)                      \
 276         CPPUNIT_ASSERT_EQUAL(result, s.EndsWith(suffix, &rest));              \
 277         if ( result )                                                         \
 278             CPPUNIT_ASSERT_EQUAL(correct_rest, rest)
 279
 280     TEST_ENDS_WITH( wxT(""),                 wxT("Hello, world!"), true  );
 281     TEST_ENDS_WITH( wxT("!"),                wxT("Hello, world"),  true  );
 282     TEST_ENDS_WITH( wxT(", world!"),         wxT("Hello"),         true  );
 283     TEST_ENDS_WITH( wxT("ello, world!"),     wxT("H"),             true  );
 284     TEST_ENDS_WITH( wxT("Hello, world!"),    wxT(""),              true  );
 285     TEST_ENDS_WITH( wxT("very long string"), wxT(""),              false );
 286     TEST_ENDS_WITH( wxT("?"),                wxT(""),              false );
 287     TEST_ENDS_WITH( wxT("Hello, world"),     wxT(""),              false );
 288     TEST_ENDS_WITH( wxT("Gello, world!"),    wxT(""),              false );
 289
 290     #undef TEST_ENDS_WITH
 291 }
 292
 293 void StringTestCase::Trim()
 294 {
 295     #define TEST_TRIM( str , dir , result )  \
 296         CPPUNIT_ASSERT( wxString(str).Trim(dir) == result )
 297
 298     TEST_TRIM( wxT("  Test  "),  true, wxT("  Test") );
 299     TEST_TRIM( wxT("    "),      true, wxT("")       );
 300     TEST_TRIM( wxT(" "),         true, wxT("")       );
 301     TEST_TRIM( wxT(""),          true, wxT("")       );
 302
 303     TEST_TRIM( wxT("  Test  "),  false, wxT("Test  ") );
 304     TEST_TRIM( wxT("    "),      false, wxT("")       );
 305     TEST_TRIM( wxT(" "),         false, wxT("")       );
 306     TEST_TRIM( wxT(""),          false, wxT("")       );
 307
 308     #undef TEST_TRIM
 309 }
 310
 311 void StringTestCase::Find()
 312 {
 313     #define TEST_FIND( str , start , result )  \
 314         CPPUNIT_ASSERT( wxString(str).find(wxT("ell"), start) == result );
 315
 316     TEST_FIND( wxT("Well, hello world"),  0, 1              );
 317     TEST_FIND( wxT("Well, hello world"),  6, 7              );
 318     TEST_FIND( wxT("Well, hello world"),  9, wxString::npos );
 319
 320     #undef TEST_FIND
 321 }
 322
 323 void StringTestCase::Replace()
 324 {
 325     #define TEST_REPLACE( original , pos , len , replacement , result ) \
 326         { \
 327             wxString s = original; \
 328             s.replace( pos , len , replacement ); \
 329             CPPUNIT_ASSERT_EQUAL( result, s ); \
 330         }
 331
 332     TEST_REPLACE( wxT("012-AWORD-XYZ"), 4, 5, wxT("BWORD"),  wxT("012-BWORD-XYZ") );
 333     TEST_REPLACE( wxT("increase"),      0, 2, wxT("de"),     wxT("decrease")      );
 334     TEST_REPLACE( wxT("wxWindow"),      8, 0, wxT("s"),      wxT("wxWindows")     );
 335     TEST_REPLACE( wxT("foobar"),        3, 0, wxT("-"),      wxT("foo-bar")       );
 336     TEST_REPLACE( wxT("barfoo"),        0, 6, wxT("foobar"), wxT("foobar")        );
 337
 338
 339     #define TEST_NULLCHARREPLACE( o , olen, pos , len , replacement , r, rlen ) \
 340         { \
 341             wxString s(o,olen); \
 342             s.replace( pos , len , replacement ); \
 343             CPPUNIT_ASSERT_EQUAL( wxString(r,rlen), s ); \
 344         }
 345
 346     TEST_NULLCHARREPLACE( wxT("null\0char"), 9, 5, 1, wxT("d"),
 347                           wxT("null\0dhar"), 9 );
 348
 349     #define TEST_WXREPLACE( o , olen, olds, news, all, r, rlen ) \
 350         { \
 351             wxString s(o,olen); \
 352             s.Replace( olds, news, all ); \
 353             CPPUNIT_ASSERT_EQUAL( wxString(r,rlen), s ); \
 354         }
 355
 356     TEST_WXREPLACE( wxT("null\0char"), 9, wxT("c"), wxT("de"), true,
 357                           wxT("null\0dehar"), 10 );
 358
 359     TEST_WXREPLACE( wxT("null\0dehar"), 10, wxT("de"), wxT("c"), true,
 360                           wxT("null\0char"), 9 );
 361
 362     TEST_WXREPLACE( "life", 4, "f", "", false, "lie", 3 );
 363     TEST_WXREPLACE( "life", 4, "f", "", true, "lie", 3 );
 364     TEST_WXREPLACE( "life", 4, "fe", "ve", true, "live", 4 );
 365     TEST_WXREPLACE( "xx", 2, "x", "yy", true, "yyyy", 4 );
 366     TEST_WXREPLACE( "xxx", 3, "xx", "z", true, "zx", 2 );
 367
 368     #undef TEST_WXREPLACE
 369     #undef TEST_NULLCHARREPLACE
 370     #undef TEST_REPLACE
 371 }
 372
 373 void StringTestCase::Match()
 374 {
 375     #define TEST_MATCH( s1 , s2 , result ) \
 376         CPPUNIT_ASSERT( wxString(s1).Matches(s2) == result )
 377
 378     TEST_MATCH( wxT("foobar"),    wxT("foo*"),   true  );
 379     TEST_MATCH( wxT("foobar"),    wxT("*oo*"),   true  );
 380     TEST_MATCH( wxT("foobar"),    wxT("*bar"),   true  );
 381     TEST_MATCH( wxT("foobar"),    wxT("??????"), true  );
 382     TEST_MATCH( wxT("foobar"),    wxT("f??b*"),  true  );
 383     TEST_MATCH( wxT("foobar"),    wxT("f?b*"),   false );
 384     TEST_MATCH( wxT("foobar"),    wxT("*goo*"),  false );
 385     TEST_MATCH( wxT("foobar"),    wxT("*foo"),   false );
 386     TEST_MATCH( wxT("foobarfoo"), wxT("*foo"),   true  );
 387     TEST_MATCH( wxT(""),          wxT("*"),      true  );
 388     TEST_MATCH( wxT(""),          wxT("?"),      false );
 389
 390     #undef TEST_MATCH
 391 }
 392
 393
 394 void StringTestCase::CaseChanges()
 395 {
 396     wxString s1(wxT("Hello!"));
 397     wxString s1u(s1);
 398     wxString s1l(s1);
 399     s1u.MakeUpper();
 400     s1l.MakeLower();
 401
 402     CPPUNIT_ASSERT_EQUAL( wxT("HELLO!"), s1u );
 403     CPPUNIT_ASSERT_EQUAL( wxT("hello!"), s1l );
 404
 405     wxString s2u, s2l;
 406     s2u.MakeUpper();
 407     s2l.MakeLower();
 408
 409     CPPUNIT_ASSERT_EQUAL( "", s2u );
 410     CPPUNIT_ASSERT_EQUAL( "", s2l );
 411
 412
 413     wxString s3("good bye");
 414     CPPUNIT_ASSERT_EQUAL( "Good bye", s3.Capitalize() );
 415     s3.MakeCapitalized();
 416     CPPUNIT_ASSERT_EQUAL( "Good bye", s3 );
 417
 418     CPPUNIT_ASSERT_EQUAL( "Abc", wxString("ABC").Capitalize() );
 419
 420     CPPUNIT_ASSERT_EQUAL( "", wxString().Capitalize() );
 421 }
 422
 423 void StringTestCase::Compare()
 424 {
 425     wxString s1 = wxT("AHH");
 426     wxString eq = wxT("AHH");
 427     wxString neq1 = wxT("HAH");
 428     wxString neq2 = wxT("AH");
 429     wxString neq3 = wxT("AHHH");
 430     wxString neq4 = wxT("AhH");
 431
 432     CPPUNIT_ASSERT( s1 == eq );
 433     CPPUNIT_ASSERT( s1 != neq1 );
 434     CPPUNIT_ASSERT( s1 != neq2 );
 435     CPPUNIT_ASSERT( s1 != neq3 );
 436     CPPUNIT_ASSERT( s1 != neq4 );
 437
 438     CPPUNIT_ASSERT( s1 == wxT("AHH") );
 439     CPPUNIT_ASSERT( s1 != wxT("no") );
 440     CPPUNIT_ASSERT( s1 < wxT("AZ") );
 441     CPPUNIT_ASSERT( s1 <= wxT("AZ") );
 442     CPPUNIT_ASSERT( s1 <= wxT("AHH") );
 443     CPPUNIT_ASSERT( s1 > wxT("AA") );
 444     CPPUNIT_ASSERT( s1 >= wxT("AA") );
 445     CPPUNIT_ASSERT( s1 >= wxT("AHH") );
 446
 447     // test comparison with C strings in Unicode build (must work in ANSI as
 448     // well, of course):
 449     CPPUNIT_ASSERT( s1 == "AHH" );
 450     CPPUNIT_ASSERT( s1 != "no" );
 451     CPPUNIT_ASSERT( s1 < "AZ" );
 452     CPPUNIT_ASSERT( s1 <= "AZ" );
 453     CPPUNIT_ASSERT( s1 <= "AHH" );
 454     CPPUNIT_ASSERT( s1 > "AA" );
 455     CPPUNIT_ASSERT( s1 >= "AA" );
 456     CPPUNIT_ASSERT( s1 >= "AHH" );
 457
 458 //    wxString _s1 = wxT("A\0HH");
 459 //    wxString _eq = wxT("A\0HH");
 460 //    wxString _neq1 = wxT("H\0AH");
 461 //    wxString _neq2 = wxT("A\0H");
 462 //    wxString _neq3 = wxT("A\0HHH");
 463 //    wxString _neq4 = wxT("A\0hH");
 464     s1.insert(1,1,'\0');
 465     eq.insert(1,1,'\0');
 466     neq1.insert(1,1,'\0');
 467     neq2.insert(1,1,'\0');
 468     neq3.insert(1,1,'\0');
 469     neq4.insert(1,1,'\0');
 470
 471     CPPUNIT_ASSERT( s1 == eq );
 472     CPPUNIT_ASSERT( s1 != neq1 );
 473     CPPUNIT_ASSERT( s1 != neq2 );
 474     CPPUNIT_ASSERT( s1 != neq3 );
 475     CPPUNIT_ASSERT( s1 != neq4 );
 476
 477     CPPUNIT_ASSERT( wxString("\n").Cmp(" ") < 0 );
 478     CPPUNIT_ASSERT( wxString("'").Cmp("!") > 0 );
 479     CPPUNIT_ASSERT( wxString("!").Cmp("z") < 0 );
 480 }
 481
 482 void StringTestCase::CompareNoCase()
 483 {
 484     wxString s1 = wxT("AHH");
 485     wxString eq = wxT("AHH");
 486     wxString eq2 = wxT("AhH");
 487     wxString eq3 = wxT("ahh");
 488     wxString neq = wxT("HAH");
 489     wxString neq2 = wxT("AH");
 490     wxString neq3 = wxT("AHHH");
 491
 492     #define CPPUNIT_CNCEQ_ASSERT(s1, s2) CPPUNIT_ASSERT( s1.CmpNoCase(s2) == 0)
 493     #define CPPUNIT_CNCNEQ_ASSERT(s1, s2) CPPUNIT_ASSERT( s1.CmpNoCase(s2) != 0)
 494
 495     CPPUNIT_CNCEQ_ASSERT( s1, eq );
 496     CPPUNIT_CNCEQ_ASSERT( s1, eq2 );
 497     CPPUNIT_CNCEQ_ASSERT( s1, eq3 );
 498
 499     CPPUNIT_CNCNEQ_ASSERT( s1, neq );
 500     CPPUNIT_CNCNEQ_ASSERT( s1, neq2 );
 501     CPPUNIT_CNCNEQ_ASSERT( s1, neq3 );
 502
 503
 504 //    wxString _s1 = wxT("A\0HH");
 505 //    wxString _eq = wxT("A\0HH");
 506 //    wxString _eq2 = wxT("A\0hH");
 507 //    wxString _eq3 = wxT("a\0hh");
 508 //    wxString _neq = wxT("H\0AH");
 509 //    wxString _neq2 = wxT("A\0H");
 510 //    wxString _neq3 = wxT("A\0HHH");
 511
 512     s1.insert(1,1,'\0');
 513     eq.insert(1,1,'\0');
 514     eq2.insert(1,1,'\0');
 515     eq3.insert(1,1,'\0');
 516     neq.insert(1,1,'\0');
 517     neq2.insert(1,1,'\0');
 518     neq3.insert(1,1,'\0');
 519
 520     CPPUNIT_CNCEQ_ASSERT( s1, eq );
 521     CPPUNIT_CNCEQ_ASSERT( s1, eq2 );
 522     CPPUNIT_CNCEQ_ASSERT( s1, eq3 );
 523
 524     CPPUNIT_CNCNEQ_ASSERT( s1, neq );
 525     CPPUNIT_CNCNEQ_ASSERT( s1, neq2 );
 526     CPPUNIT_CNCNEQ_ASSERT( s1, neq3 );
 527
 528     CPPUNIT_ASSERT( wxString("\n").CmpNoCase(" ") < 0 );
 529     CPPUNIT_ASSERT( wxString("'").CmpNoCase("!") > 0);
 530     CPPUNIT_ASSERT( wxString("!").Cmp("Z") < 0 );
 531 }
 532
 533 void StringTestCase::Contains()
 534 {
 535     static const struct ContainsData
 536     {
 537         const wxChar *hay;
 538         const wxChar *needle;
 539         bool contains;
 540     } containsData[] =
 541     {
 542         { wxT(""),       wxT(""),         true  },
 543         { wxT(""),       wxT("foo"),      false },
 544         { wxT("foo"),    wxT(""),         true  },
 545         { wxT("foo"),    wxT("f"),        true  },
 546         { wxT("foo"),    wxT("o"),        true  },
 547         { wxT("foo"),    wxT("oo"),       true  },
 548         { wxT("foo"),    wxT("ooo"),      false },
 549         { wxT("foo"),    wxT("oooo"),     false },
 550         { wxT("foo"),    wxT("fooo"),     false },
 551     };
 552
 553     for ( size_t n = 0; n < WXSIZEOF(containsData); n++ )
 554     {
 555         const ContainsData& cd = containsData[n];
 556         CPPUNIT_ASSERT_EQUAL( cd.contains, wxString(cd.hay).Contains(cd.needle) );
 557     }
 558 }
 559
 560 // flags used in ToLongData.flags
 561 enum
 562 {
 563     Number_Ok       = 0,
 564     Number_Invalid  = 1,
 565     Number_Unsigned = 2,    // if not specified, works for signed conversion
 566     Number_Signed   = 4,    // if not specified, works for unsigned
 567     Number_LongLong = 8,    // only for long long tests
 568     Number_Long     = 16    // only for long tests
 569 };
 570
 571 static const struct ToLongData
 572 {
 573     const wxChar *str;
 574 #ifdef wxLongLong_t
 575     wxLongLong_t value;
 576 #else
 577     long value;
 578 #endif // wxLongLong_t
 579     int flags;
 580
 581     long LValue() const { return value; }
 582     unsigned long ULValue() const { return value; }
 583 #ifdef wxLongLong_t
 584     wxLongLong_t LLValue() const { return value; }
 585     wxULongLong_t ULLValue() const { return (wxULongLong_t)value; }
 586 #endif // wxLongLong_t
 587
 588     bool IsOk() const { return !(flags & Number_Invalid); }
 589 } longData[] =
 590 {
 591     { wxT("1"), 1, Number_Ok },
 592     { wxT("0"), 0, Number_Ok },
 593     { wxT("a"), 0, Number_Invalid },
 594     { wxT("12345"), 12345, Number_Ok },
 595     { wxT("--1"), 0, Number_Invalid },
 596
 597     { wxT("-1"), -1, Number_Signed | Number_Long },
 598     // this is surprising but consistent with strtoul() behaviour
 599     { wxT("-1"), ULONG_MAX, Number_Unsigned | Number_Long },
 600
 601     // this must overflow, even with 64 bit long
 602     { wxT("922337203685477580711"), 0, Number_Invalid },
 603
 604 #ifdef wxLongLong_t
 605     { wxT("2147483648"), wxLL(2147483648), Number_LongLong },
 606     { wxT("-2147483648"), wxLL(-2147483648), Number_LongLong | Number_Signed },
 607     { wxT("9223372036854775808"), wxULL(9223372036854775808), Number_LongLong |
 608                                                              Number_Unsigned },
 609 #endif // wxLongLong_t
 610 };
 611
 612 void StringTestCase::ToLong()
 613 {
 614     long l;
 615     for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
 616     {
 617         const ToLongData& ld = longData[n];
 618
 619         if ( ld.flags & (Number_LongLong | Number_Unsigned) )
 620             continue;
 621
 622         // NOTE: unless you're using some exotic locale, ToCLong and ToLong
 623         //       should behave the same for our test data set:
 624
 625         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToCLong(&l) );
 626         if ( ld.IsOk() )
 627             CPPUNIT_ASSERT_EQUAL( ld.LValue(), l );
 628
 629         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToLong(&l) );
 630         if ( ld.IsOk() )
 631             CPPUNIT_ASSERT_EQUAL( ld.LValue(), l );
 632     }
 633
 634     // special case: check that the output is not modified if the parsing
 635     // failed completely
 636     l = 17;
 637     CPPUNIT_ASSERT( !wxString("foo").ToLong(&l) );
 638     CPPUNIT_ASSERT_EQUAL( 17, l );
 639
 640     // also check that it is modified if we did parse something successfully in
 641     // the beginning of the string
 642     CPPUNIT_ASSERT( !wxString("9 cats").ToLong(&l) );
 643     CPPUNIT_ASSERT_EQUAL( 9, l );
 644 }
 645
 646 void StringTestCase::ToULong()
 647 {
 648     unsigned long ul;
 649     for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
 650     {
 651         const ToLongData& ld = longData[n];
 652
 653         if ( ld.flags & (Number_LongLong | Number_Signed) )
 654             continue;
 655
 656         // NOTE: unless you're using some exotic locale, ToCLong and ToLong
 657         //       should behave the same for our test data set:
 658
 659         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToCULong(&ul) );
 660         if ( ld.IsOk() )
 661             CPPUNIT_ASSERT_EQUAL( ld.ULValue(), ul );
 662
 663         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToULong(&ul) );
 664         if ( ld.IsOk() )
 665             CPPUNIT_ASSERT_EQUAL( ld.ULValue(), ul );
 666     }
 667 }
 668
 669 #ifdef wxLongLong_t
 670
 671 void StringTestCase::ToLongLong()
 672 {
 673     wxLongLong_t l;
 674     for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
 675     {
 676         const ToLongData& ld = longData[n];
 677
 678         if ( ld.flags & (Number_Long | Number_Unsigned) )
 679             continue;
 680
 681         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToLongLong(&l) );
 682         if ( ld.IsOk() )
 683             CPPUNIT_ASSERT_EQUAL( ld.LLValue(), l );
 684     }
 685 }
 686
 687 void StringTestCase::ToULongLong()
 688 {
 689     wxULongLong_t ul;
 690     for ( size_t n = 0; n < WXSIZEOF(longData); n++ )
 691     {
 692         const ToLongData& ld = longData[n];
 693
 694         if ( ld.flags & (Number_Long | Number_Signed) )
 695             continue;
 696
 697         CPPUNIT_ASSERT_EQUAL( ld.IsOk(), wxString(ld.str).ToULongLong(&ul) );
 698         if ( ld.IsOk() )
 699             CPPUNIT_ASSERT_EQUAL( ld.ULLValue(), ul );
 700     }
 701 }
 702
 703 #endif // wxLongLong_t
 704
 705 void StringTestCase::ToDouble()
 706 {
 707     double d;
 708     static const struct ToDoubleData
 709     {
 710         const wxChar *str;
 711         double value;
 712         bool ok;
 713     } doubleData[] =
 714     {
 715         { wxT("1"), 1, true },
 716         { wxT("1.23"), 1.23, true },
 717         { wxT(".1"), .1, true },
 718         { wxT("1."), 1, true },
 719         { wxT("1.."), 0, false },
 720         { wxT("0"), 0, true },
 721         { wxT("a"), 0, false },
 722         { wxT("12345"), 12345, true },
 723         { wxT("-1"), -1, true },
 724         { wxT("--1"), 0, false },
 725         { wxT("-3E-5"), -3E-5, true },
 726         { wxT("-3E-abcde5"), 0, false },
 727     };
 728
 729     // test ToCDouble() first:
 730
 731     size_t n;
 732     for ( n = 0; n < WXSIZEOF(doubleData); n++ )
 733     {
 734         const ToDoubleData& ld = doubleData[n];
 735         CPPUNIT_ASSERT_EQUAL( ld.ok, wxString(ld.str).ToCDouble(&d) );
 736         if ( ld.ok )
 737             CPPUNIT_ASSERT_EQUAL( ld.value, d );
 738     }
 739
 740
 741     // test ToDouble() now:
 742     // NOTE: for the test to be reliable, we need to set the locale explicitly
 743     //       so that we know the decimal point character to use
 744
 745     if (!wxLocale::IsAvailable(wxLANGUAGE_FRENCH))
 746         return;     // you should have french support installed to continue this test!
 747
 748     wxLocale locale;
 749
 750     // don't load default catalog, it may be unavailable:
 751     CPPUNIT_ASSERT( locale.Init(wxLANGUAGE_FRENCH, wxLOCALE_DONT_LOAD_DEFAULT) );
 752
 753     static const struct ToDoubleData doubleData2[] =
 754     {
 755         { wxT("1"), 1, true },
 756         { wxT("1,23"), 1.23, true },
 757         { wxT(",1"), .1, true },
 758         { wxT("1,"), 1, true },
 759         { wxT("1,,"), 0, false },
 760         { wxT("0"), 0, true },
 761         { wxT("a"), 0, false },
 762         { wxT("12345"), 12345, true },
 763         { wxT("-1"), -1, true },
 764         { wxT("--1"), 0, false },
 765         { wxT("-3E-5"), -3E-5, true },
 766         { wxT("-3E-abcde5"), 0, false },
 767     };
 768
 769     for ( n = 0; n < WXSIZEOF(doubleData2); n++ )
 770     {
 771         const ToDoubleData& ld = doubleData2[n];
 772         CPPUNIT_ASSERT_EQUAL( ld.ok, wxString(ld.str).ToDouble(&d) );
 773         if ( ld.ok )
 774             CPPUNIT_ASSERT_EQUAL( ld.value, d );
 775     }
 776 }
 777
 778 void StringTestCase::FromDouble()
 779 {
 780     static const struct FromDoubleTestData
 781     {
 782         double value;
 783         int prec;
 784         const char *str;
 785     } testData[] =
 786     {
 787         { 1.23,             -1, "1.23" },
 788         // NB: there are no standards about the minimum exponent width
 789         //     and newer MSVC versions use 3 digits as minimum exponent
 790         //     width while GNU libc uses 2 digits as minimum width...
 791 #ifdef wxUSING_VC_CRT_IO
 792         { -3e-10,           -1, "-3e-010" },
 793 #else
 794         { -3e-10,           -1, "-3e-10" },
 795 #endif
 796         { -0.45678,         -1, "-0.45678" },
 797         { 1.2345678,         0, "1" },
 798         { 1.2345678,         1, "1.2" },
 799         { 1.2345678,         2, "1.23" },
 800         { 1.2345678,         3, "1.235" },
 801     };
 802
 803     for ( unsigned n = 0; n < WXSIZEOF(testData); n++ )
 804     {
 805         const FromDoubleTestData& td = testData[n];
 806         CPPUNIT_ASSERT_EQUAL( td.str, wxString::FromCDouble(td.value, td.prec) );
 807     }
 808
 809     if ( !wxLocale::IsAvailable(wxLANGUAGE_FRENCH) )
 810         return;
 811
 812     wxLocale locale;
 813     CPPUNIT_ASSERT( locale.Init(wxLANGUAGE_FRENCH, wxLOCALE_DONT_LOAD_DEFAULT) );
 814
 815     for ( unsigned m = 0; m < WXSIZEOF(testData); m++ )
 816     {
 817         const FromDoubleTestData& td = testData[m];
 818
 819         wxString str(td.str);
 820         str.Replace(".", ",");
 821         CPPUNIT_ASSERT_EQUAL( str, wxString::FromDouble(td.value, td.prec) );
 822     }
 823 }
 824
 825 void StringTestCase::StringBuf()
 826 {
 827     // check that buffer can be used to write into the string
 828     wxString s;
 829     wxStrcpy(wxStringBuffer(s, 10), wxT("foo"));
 830
 831     CPPUNIT_ASSERT_EQUAL(3, s.length());
 832     CPPUNIT_ASSERT(wxT('f') == s[0u]);
 833     CPPUNIT_ASSERT(wxT('o') == s[1]);
 834     CPPUNIT_ASSERT(wxT('o') == s[2]);
 835
 836     {
 837         // also check that the buffer initially contains the original string
 838         // contents
 839         wxStringBuffer buf(s, 10);
 840         CPPUNIT_ASSERT_EQUAL( wxT('f'), buf[0] );
 841         CPPUNIT_ASSERT_EQUAL( wxT('o'), buf[1] );
 842         CPPUNIT_ASSERT_EQUAL( wxT('o'), buf[2] );
 843         CPPUNIT_ASSERT_EQUAL( wxT('\0'), buf[3] );
 844     }
 845
 846     {
 847         wxStringBufferLength buf(s, 10);
 848         CPPUNIT_ASSERT_EQUAL( wxT('f'), buf[0] );
 849         CPPUNIT_ASSERT_EQUAL( wxT('o'), buf[1] );
 850         CPPUNIT_ASSERT_EQUAL( wxT('o'), buf[2] );
 851         CPPUNIT_ASSERT_EQUAL( wxT('\0'), buf[3] );
 852
 853         // and check that it can be used to write only the specified number of
 854         // characters to the string
 855         wxStrcpy(buf, wxT("barrbaz"));
 856         buf.SetLength(4);
 857     }
 858
 859     CPPUNIT_ASSERT_EQUAL(4, s.length());
 860     CPPUNIT_ASSERT(wxT('b') == s[0u]);
 861     CPPUNIT_ASSERT(wxT('a') == s[1]);
 862     CPPUNIT_ASSERT(wxT('r') == s[2]);
 863     CPPUNIT_ASSERT(wxT('r') == s[3]);
 864
 865     // check that creating buffer of length smaller than string works, i.e. at
 866     // least doesn't crash (it would if we naively copied the entire original
 867     // string contents in the buffer)
 868     *wxStringBuffer(s, 1) = '!';
 869 }
 870
 871 void StringTestCase::UTF8Buf()
 872 {
 873 #if wxUSE_UNICODE
 874     // "czech" in Czech ("cestina"):
 875     static const char *textUTF8 = "\304\215e\305\241tina";
 876     static const wchar_t textUTF16[] = {0x10D, 0x65, 0x161, 0x74, 0x69, 0x6E, 0x61, 0};
 877
 878     wxString s;
 879     wxStrcpy(wxUTF8StringBuffer(s, 9), textUTF8);
 880     CPPUNIT_ASSERT(s == textUTF16);
 881
 882     {
 883         wxUTF8StringBufferLength buf(s, 20);
 884         wxStrcpy(buf, textUTF8);
 885         buf.SetLength(5);
 886     }
 887     CPPUNIT_ASSERT(s == wxString(textUTF16, 0, 3));
 888 #endif // wxUSE_UNICODE
 889 }
 890
 891
 892
 893 void StringTestCase::CStrDataTernaryOperator()
 894 {
 895     DoCStrDataTernaryOperator(true);
 896     DoCStrDataTernaryOperator(false);
 897 }
 898
 899 template<typename T> bool CheckStr(const wxString& expected, T s)
 900 {
 901     return expected == wxString(s);
 902 }
 903
 904 void StringTestCase::DoCStrDataTernaryOperator(bool cond)
 905 {
 906     // test compilation of wxCStrData when used with operator?: (the asserts
 907     // are not very important, we're testing if the code compiles at all):
 908
 909     wxString s("foo");
 910
 911     const wchar_t *wcStr = L"foo";
 912     CPPUNIT_ASSERT( CheckStr(s, (cond ? s.c_str() : wcStr)) );
 913     CPPUNIT_ASSERT( CheckStr(s, (cond ? s.c_str() : L"foo")) );
 914     CPPUNIT_ASSERT( CheckStr(s, (cond ? wcStr : s.c_str())) );
 915     CPPUNIT_ASSERT( CheckStr(s, (cond ? L"foo" : s.c_str())) );
 916
 917     const char *mbStr = "foo";
 918     CPPUNIT_ASSERT( CheckStr(s, (cond ? s.c_str() : mbStr)) );
 919     CPPUNIT_ASSERT( CheckStr(s, (cond ? s.c_str() : "foo")) );
 920     CPPUNIT_ASSERT( CheckStr(s, (cond ? mbStr : s.c_str())) );
 921     CPPUNIT_ASSERT( CheckStr(s, (cond ? "foo" : s.c_str())) );
 922
 923     wxString empty("");
 924     CPPUNIT_ASSERT( CheckStr(empty, (cond ? empty.c_str() : wxEmptyString)) );
 925     CPPUNIT_ASSERT( CheckStr(empty, (cond ? wxEmptyString : empty.c_str())) );
 926 }
 927
 928 void StringTestCase::CStrDataOperators()
 929 {
 930     wxString s("hello");
 931
 932     CPPUNIT_ASSERT( s.c_str()[0] == 'h' );
 933     CPPUNIT_ASSERT( s.c_str()[1] == 'e' );
 934
 935     // IMPORTANT: at least with the CRT coming with MSVC++ 2008 trying to access
 936     //            the final character results in an assert failure (with debug CRT)
 937     //CPPUNIT_ASSERT( s.c_str()[5] == '\0' );
 938
 939     CPPUNIT_ASSERT( *s.c_str() == 'h' );
 940     CPPUNIT_ASSERT( *(s.c_str() + 2) == 'l' );
 941     //CPPUNIT_ASSERT( *(s.c_str() + 5) == '\0' );
 942 }
 943
 944 bool CheckStrChar(const wxString& expected, char *s)
 945     { return CheckStr(expected, s); }
 946 bool CheckStrWChar(const wxString& expected, wchar_t *s)
 947     { return CheckStr(expected, s); }
 948 bool CheckStrConstChar(const wxString& expected, const char *s)
 949     { return CheckStr(expected, s); }
 950 bool CheckStrConstWChar(const wxString& expected, const wchar_t *s)
 951     { return CheckStr(expected, s); }
 952
 953 void StringTestCase::CStrDataImplicitConversion()
 954 {
 955     wxString s("foo");
 956
 957     CPPUNIT_ASSERT( CheckStrConstWChar(s, s.c_str()) );
 958     CPPUNIT_ASSERT( CheckStrConstChar(s, s.c_str()) );
 959
 960     // implicit conversion of wxString is not available in STL build
 961 #if !wxUSE_STL
 962     CPPUNIT_ASSERT( CheckStrConstWChar(s, s) );
 963     CPPUNIT_ASSERT( CheckStrConstChar(s, s) );
 964 #endif
 965 }
 966
 967 void StringTestCase::ExplicitConversion()
 968 {
 969     wxString s("foo");
 970
 971     CPPUNIT_ASSERT( CheckStr(s, s.mb_str()) );
 972     CPPUNIT_ASSERT( CheckStrConstChar(s, s.mb_str()) );
 973     CPPUNIT_ASSERT( CheckStrChar(s, s.char_str()) );
 974
 975     CPPUNIT_ASSERT( CheckStr(s, s.wc_str()) );
 976     CPPUNIT_ASSERT( CheckStrConstWChar(s, s.wc_str()) );
 977     CPPUNIT_ASSERT( CheckStrWChar(s, s.wchar_str()) );
 978 }
 979
 980 void StringTestCase::IndexedAccess()
 981 {
 982     wxString s("bar");
 983     CPPUNIT_ASSERT_EQUAL( 'r', (char)s[2] );
 984
 985     // this tests for a possible bug in UTF-8 based wxString implementation:
 986     // the 3rd character of the underlying byte string is going to change, but
 987     // the 3rd character of wxString should remain the same
 988     s[0] = L'\xe9';
 989     CPPUNIT_ASSERT_EQUAL( 'r', (char)s[2] );
 990 }
 991
 992 void StringTestCase::BeforeAndAfter()
 993 {
 994     // Construct a string with 2 equal signs in it by concatenating its three
 995     // parts: before the first "=", in between the two "="s and after the last
 996     // one. This allows to avoid duplicating the string contents (which has to
 997     // be different for Unicode and ANSI builds) in the tests below.
 998 #if wxUSE_UNICODE
 999     #define FIRST_PART L"letter"
1000     #define MIDDLE_PART L"\xe9;\xe7a"
1001     #define LAST_PART L"l\xe0"
1002 #else // !wxUSE_UNICODE
1003     #define FIRST_PART "letter"
1004     #define MIDDLE_PART "e;ca"
1005     #define LAST_PART "la"
1006 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
1007
1008     const wxString s(FIRST_PART wxT("=") MIDDLE_PART wxT("=") LAST_PART);
1009
1010     wxString r;
1011
1012     CPPUNIT_ASSERT_EQUAL( FIRST_PART, s.BeforeFirst('=', &r) );
1013     CPPUNIT_ASSERT_EQUAL( MIDDLE_PART wxT("=") LAST_PART, r );
1014
1015     CPPUNIT_ASSERT_EQUAL( s, s.BeforeFirst('!', &r) );
1016     CPPUNIT_ASSERT_EQUAL( "", r );
1017
1018
1019     CPPUNIT_ASSERT_EQUAL( FIRST_PART wxT("=") MIDDLE_PART, s.BeforeLast('=', &r) );
1020     CPPUNIT_ASSERT_EQUAL( LAST_PART, r );
1021
1022     CPPUNIT_ASSERT_EQUAL( "", s.BeforeLast('!', &r) );
1023     CPPUNIT_ASSERT_EQUAL( s, r );
1024
1025
1026     CPPUNIT_ASSERT_EQUAL( MIDDLE_PART wxT("=") LAST_PART, s.AfterFirst('=') );
1027     CPPUNIT_ASSERT_EQUAL( "", s.AfterFirst('!') );
1028
1029
1030     CPPUNIT_ASSERT_EQUAL( LAST_PART, s.AfterLast('=') );
1031     CPPUNIT_ASSERT_EQUAL( s, s.AfterLast('!') );
1032
1033     #undef LAST_PART
1034     #undef MIDDLE_PART
1035     #undef FIRST_PART
1036 }
1037
1038 void StringTestCase::ScopedBuffers()
1039 {
1040     // wxString relies on efficient buffers, verify they work as they should
1041
1042     const char *literal = "Hello World!";
1043
1044     // non-owned buffer points to the string passed to it
1045     wxScopedCharBuffer sbuf = wxScopedCharBuffer::CreateNonOwned(literal);
1046     CPPUNIT_ASSERT( sbuf.data() == literal );
1047
1048     // a copy of scoped non-owned buffer still points to the same string
1049     wxScopedCharBuffer sbuf2(sbuf);
1050     CPPUNIT_ASSERT( sbuf.data() == sbuf2.data() );
1051
1052     // but assigning it to wxCharBuffer makes a full copy
1053     wxCharBuffer buf(sbuf);
1054     CPPUNIT_ASSERT( buf.data() != literal );
1055     CPPUNIT_ASSERT_EQUAL( literal, buf.data() );
1056
1057     wxCharBuffer buf2 = sbuf;
1058     CPPUNIT_ASSERT( buf2.data() != literal );
1059     CPPUNIT_ASSERT_EQUAL( literal, buf.data() );
1060
1061     // Check that extending the buffer keeps it NUL-terminated.
1062     size_t len = 10;
1063
1064     wxCharBuffer buf3(len);
1065     CPPUNIT_ASSERT_EQUAL('\0', buf3.data()[len]);
1066
1067     wxCharBuffer buf4;
1068     buf4.extend(len);
1069     CPPUNIT_ASSERT_EQUAL('\0', buf4.data()[len]);
1070
1071     wxCharBuffer buf5(5);
1072     buf5.extend(len);
1073     CPPUNIT_ASSERT_EQUAL('\0', buf5.data()[len]);
1074 }