tests/streams/bstream.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/streams/bstream.h
   3 // Purpose:     Template class for testing base stream functions.
   4 // Author:      Hans Van Leemputten
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 2004 Hans Van Leemputten
   7 // Licence:     wxWidgets licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_TESTBSTREAM_H__
  11 #define _WX_TESTBSTREAM_H__
  12
  13 #include "wx/cppunit.h"
  14
  15 ///////////////////////////////////////////////////////////////////////////////
  16 // Some macros preventing us from typing too much ;-)
  17 //
  18
  19 #define STREAM_TEST_NAME "Streams"
  20 #define COMPOSE_TEST_NAME(Name) \
  21     STREAM_TEST_NAME "." #Name
  22 #define STREAM_REGISTER_SUB_SUITE(Name) \
  23     extern CppUnit::Test* Get##Name##Suite(); \
  24     suite->addTest(Get##Name##Suite())
  25 #define STREAM_IMPLEMENT_SUB_REGISTRATION_ROUTINE(Name) \
  26     CppUnit::Test* Get##Name##Suite() { return Name::suite(); }
  27 #define STREAM_TEST_SUBSUITE_NAMED_REGISTRATION(Name) \
  28     CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( Name, COMPOSE_TEST_NAME(Name) ); \
  29     STREAM_IMPLEMENT_SUB_REGISTRATION_ROUTINE( Name )
  30
  31
  32 ///////////////////////////////////////////////////////////////////////////////
  33 // Template class that implements a test for all base stream functions.
  34 //
  35
  36 template <class TStreamIn, class TStreamOut> class BaseStreamTestCase : public CppUnit::TestCase
  37 {
  38 protected:
  39     typedef BaseStreamTestCase<TStreamIn, TStreamOut> StreamTestCase;
  40
  41     class CleanupHelper
  42     {
  43     public:
  44         CleanupHelper(StreamTestCase *value)
  45             :m_pCleanup(value)
  46         {}
  47         ~CleanupHelper()
  48         {
  49             m_pCleanup->DeleteInStream();
  50             m_pCleanup->DeleteOutStream();
  51         }
  52     private:
  53         StreamTestCase   *m_pCleanup;
  54     };
  55     friend class CleanupHelper;
  56
  57 public:
  58     BaseStreamTestCase()
  59         :m_bSimpleTellITest(false),
  60          m_bSimpleTellOTest(false),
  61          m_bSeekInvalidBeyondEnd(true),
  62          m_bEofAtLastRead(true),
  63          m_pCurrentIn(NULL),
  64          m_pCurrentOut(NULL)
  65     { /* Nothing extra */ }
  66     virtual ~BaseStreamTestCase()
  67     {
  68         // Prevent mem leaks!
  69         delete m_pCurrentIn;
  70         delete m_pCurrentOut;
  71     }
  72
  73 protected:
  74     /*
  75      * Input stream tests.
  76      */
  77
  78     // Just try to perform a GetSize() on the input stream.
  79     void Input_GetSize()
  80     {
  81         CleanupHelper cleanup(this);
  82         const TStreamIn &stream_in = CreateInStream();
  83         CPPUNIT_ASSERT(!stream_in.Eof());
  84
  85         // Size should be greater then zero.
  86         // Note: streams not supporting this should register this test
  87         //       with CPPUNIT_TEST_FAIL instead of CPPUNIT_TEST.
  88         CPPUNIT_ASSERT(stream_in.GetSize() != 0);
  89     }
  90
  91     // Just try to perform a GetC() on the input stream.
  92     void Input_GetC()
  93     {
  94         CleanupHelper cleanup(this);
  95         TStreamIn &stream_in = CreateInStream();
  96         CPPUNIT_ASSERT(!stream_in.Eof());
  97
  98         // If no exception occurs the test is successful.
  99         (void)stream_in.GetC();
 100     }
 101
 102     // Just try to perform a Read() on the input stream.
 103     void Input_Read()
 104     {
 105         CleanupHelper cleanup(this);
 106         TStreamIn &stream_in = CreateInStream();
 107         CPPUNIT_ASSERT(!stream_in.Eof());
 108
 109         // Note: the input stream should at least be of min size +10!
 110
 111         char buf[10];
 112         (void)stream_in.Read(buf, 10);
 113
 114         CPPUNIT_ASSERT(!stream_in.Eof());
 115         CPPUNIT_ASSERT(stream_in.IsOk());
 116
 117         // Test the stream version aswell.
 118         TStreamOut &stream_out = CreateOutStream();
 119         (void)stream_in.Read(stream_out);
 120
 121         // The output stream should have read the input stream till the end.
 122         CPPUNIT_ASSERT(stream_in.Eof());
 123     }
 124
 125     // Test and see what happens to the EOF when we
 126     // read after EOF was encountered.
 127     void Input_Eof()
 128     {
 129         CleanupHelper cleanup(this);
 130         TStreamIn &stream_in = CreateInStream();
 131         CPPUNIT_ASSERT(!stream_in.Eof());
 132         // Double check to see if Eof it self doesn't changes the Eof status.
 133         CPPUNIT_ASSERT(!stream_in.Eof());
 134
 135         // Travel to the end of the stream.
 136         while(!stream_in.Eof())
 137         {
 138             CPPUNIT_ASSERT_MESSAGE( "unexpected non-EOF stream error",
 139                                     stream_in.IsOk() );
 140
 141             // Read, we move one byte along.
 142             (void)stream_in.GetC();
 143 #if 0
 144             // EOF behaviour is different in streams, disabled (for now?)
 145
 146             if (m_bEofAtLastRead)
 147                 // EOF should only occure after the last successful get.
 148                 CPPUNIT_ASSERT_MESSAGE("Eof is detected too late.", !(stream_in.LastRead() != 1 && stream_in.Eof()));
 149             else
 150                 // EOF should only occure after a failed get.
 151                 CPPUNIT_ASSERT_MESSAGE("Eof is detected too soon.", !(stream_in.LastRead() == 1 && stream_in.Eof()));
 152 #endif
 153         }
 154
 155         // Check EOF stream state.
 156         CPPUNIT_ASSERT_MESSAGE("EOF is not EOF?", stream_in.Eof());
 157
 158         // Ok we found the end, lets see if we can go past it.
 159         for (size_t i = 0; i < 100; i++)
 160             (void)stream_in.GetC();
 161
 162         // Check for EOF correctness.
 163         CPPUNIT_ASSERT_MESSAGE("EOF is wrong when we read past EOF!", stream_in.Eof());
 164         CPPUNIT_ASSERT_MESSAGE("Last error is not EOF while stream_in.Eof() is true", stream_in.GetLastError() == wxSTREAM_EOF);
 165     }
 166
 167     // Just try to perform a LastRead() on the input stream.
 168     void Input_LastRead()
 169     {
 170         CleanupHelper cleanup(this);
 171         TStreamIn &stream_in = CreateInStream();
 172         CPPUNIT_ASSERT(!stream_in.Eof());
 173
 174         char buf[5];
 175         (void)stream_in.Read(buf, 5);
 176         CPPUNIT_ASSERT(stream_in.LastRead() == 5);
 177         (void)stream_in.GetC();
 178         CPPUNIT_ASSERT(stream_in.LastRead() == 1);
 179     }
 180
 181     void Input_CanRead()
 182     {
 183         CleanupHelper cleanup(this);
 184         TStreamIn &stream_in = CreateInStream();
 185
 186         CPPUNIT_ASSERT( stream_in.CanRead() );
 187
 188         // read the entire contents
 189         (void)stream_in.Read(CreateOutStream());
 190
 191         CPPUNIT_ASSERT( !stream_in.CanRead() );
 192     }
 193
 194     // Just try to perform a SeekI() on the input stream.
 195     void Input_SeekI()
 196     {
 197         CleanupHelper cleanup(this);
 198         TStreamIn &stream_in = CreateInStream();
 199
 200         CPPUNIT_ASSERT( stream_in.IsSeekable() );
 201         CPPUNIT_ASSERT(!stream_in.Eof());
 202
 203         // Try to Seek in the stream...
 204         // Note: streams not supporting this should register this test
 205         //       with CPPUNIT_TEST_FAIL instead of CPPUNIT_TEST.
 206         CPPUNIT_ASSERT(stream_in.SeekI(2, wxFromStart) == 2);
 207         CPPUNIT_ASSERT(stream_in.SeekI(2, wxFromCurrent) == 4);
 208         // Not sure the following line is correct, so test it differently.
 209         //CPPUNIT_ASSERT(stream_in.SeekI(-2, wxFromEnd) == (off_t)stream_in.GetSize()-2);
 210         CPPUNIT_ASSERT(stream_in.SeekI(-2, wxFromEnd) != wxInvalidOffset);
 211         // Go beyond the stream size.
 212         CPPUNIT_ASSERT((stream_in.SeekI(10, wxFromCurrent) == wxInvalidOffset) == m_bSeekInvalidBeyondEnd);
 213     }
 214
 215     // Just try to perform a TellI() on the input stream.
 216     void Input_TellI()
 217     {
 218         CleanupHelper cleanup(this);
 219         TStreamIn &stream_in = CreateInStream();
 220
 221         // this test shouldn't be used at all if the stream isn't seekable
 222         CPPUNIT_ASSERT( stream_in.IsSeekable() );
 223
 224         CPPUNIT_ASSERT(!stream_in.Eof());
 225
 226         // Try to Get the location in the stream...
 227         CPPUNIT_ASSERT(stream_in.TellI() == 0);
 228         (void)stream_in.GetC();
 229         CPPUNIT_ASSERT(stream_in.TellI() == 1);
 230         if (!m_bSimpleTellITest)
 231         {
 232             wxFileOffset pos = stream_in.SeekI(5, wxFromStart);
 233             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 234             (void)stream_in.GetC();
 235             CPPUNIT_ASSERT(stream_in.TellI() == 6);
 236             pos = stream_in.SeekI(2, wxFromCurrent);
 237             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 238             pos = stream_in.SeekI(5, wxFromStart);
 239             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 240         }
 241     }
 242
 243     // Just try to perform a Peek() on the input stream.
 244     void Input_Peek()
 245     {
 246         CleanupHelper cleanup(this);
 247         TStreamIn &stream_in = CreateInStream();
 248
 249         // Test the full stream
 250         while (stream_in.IsOk())
 251         {
 252             char peekChar = stream_in.Peek();
 253             char getChar = stream_in.GetC();
 254             if (stream_in.LastRead() == 1)
 255                 CPPUNIT_ASSERT(peekChar == getChar);
 256         }
 257     }
 258
 259     // Just try to perform a Ungetch() on the input stream.
 260     void Input_Ungetch()
 261     {
 262         CleanupHelper cleanup(this);
 263         TStreamIn &stream_in = CreateInStream();
 264         CPPUNIT_ASSERT(!stream_in.Eof());
 265
 266         const char *ungetstr = "test";
 267         size_t ungetsize = stream_in.Ungetch(ungetstr, strlen(ungetstr) + 1);
 268         if (ungetsize != 0)
 269         {
 270             CPPUNIT_ASSERT(ungetsize == strlen(ungetstr) + 1);
 271             char buf[10];
 272             (void)stream_in.Read(buf, ungetsize);
 273             CPPUNIT_ASSERT(strcmp(buf, ungetstr) == 0);
 274         }
 275
 276         if (stream_in.Ungetch('a'))
 277         {
 278             CPPUNIT_ASSERT(stream_in.GetC() == 'a');
 279         }
 280     }
 281
 282     /*
 283      * Output stream tests.
 284      */
 285
 286     // Just try to perform a PutC() on the output stream.
 287     void Output_PutC()
 288     {
 289         CleanupHelper cleanup(this);
 290         TStreamOut &stream_out = CreateOutStream();
 291
 292         const char *buf = "Some text";
 293         const wxFileOffset len = strlen(buf);
 294         for ( int i = 0; i < len; i++ )
 295             stream_out.PutC(buf[i]);
 296
 297         if ( stream_out.IsSeekable() )
 298             CPPUNIT_ASSERT_EQUAL(len, stream_out.TellO());
 299     }
 300
 301     // Just try to perform a Write() on the output stream.
 302     void Output_Write()
 303     {
 304         CleanupHelper cleanup(this);
 305         TStreamOut &stream_out = CreateOutStream();
 306
 307         // Do the buffer version.
 308         const char *buf = "Some text";
 309         const wxFileOffset len = strlen(buf);
 310         (void)stream_out.Write(buf, len);
 311         if ( stream_out.IsSeekable() )
 312             CPPUNIT_ASSERT_EQUAL( len, stream_out.TellO() );
 313
 314         // Do the Stream version.
 315         TStreamIn &stream_in = CreateInStream();
 316         (void)stream_out.Write(stream_in);
 317
 318         if ( stream_out.IsSeekable() )
 319             CPPUNIT_ASSERT(stream_out.TellO() > len);
 320     }
 321
 322     // Just try to perform a LastWrite() on the output stream.
 323     void Output_LastWrite()
 324     {
 325         CleanupHelper cleanup(this);
 326         TStreamOut &stream_out = CreateOutStream();
 327
 328         const char *buf = "12345";
 329         (void)stream_out.Write(buf, 5);
 330         CPPUNIT_ASSERT(stream_out.LastWrite() == 5);
 331         (void)stream_out.PutC('1');
 332         CPPUNIT_ASSERT(stream_out.LastWrite() == 1);
 333     }
 334
 335     // Just try to perform a SeekO() on the output stream.
 336     void Output_SeekO()
 337     {
 338         CleanupHelper cleanup(this);
 339         TStreamOut &stream_out = CreateOutStream();
 340
 341         CPPUNIT_ASSERT( stream_out.IsSeekable() );
 342
 343         // First put some data in the stream, so it is not empty.
 344         const char *buf = "1234567890";
 345         (void)stream_out.Write(buf, 10);
 346
 347         // Try to Seek in the stream...
 348         // Note: streams not supporting this should register this test
 349         //       with CPPUNIT_TEST_FAIL instead of CPPUNIT_TEST.
 350         CPPUNIT_ASSERT(stream_out.SeekO(2, wxFromStart) == 2);
 351         CPPUNIT_ASSERT(stream_out.SeekO(2, wxFromCurrent) == 4);
 352         // Not sure the following line is correct, so test it differently.
 353         //CPPUNIT_ASSERT(stream_out.SeekO(-2, wxFromEnd) == (off_t)stream_in.GetSize()-2);
 354         CPPUNIT_ASSERT(stream_out.SeekO(-2, wxFromEnd) != wxInvalidOffset);
 355         // Go beyond the stream size.
 356         CPPUNIT_ASSERT((stream_out.SeekO(10, wxFromCurrent) == wxInvalidOffset) == m_bSeekInvalidBeyondEnd);
 357     }
 358
 359     // Just try to perform a TellO() on the output stream.
 360     void Output_TellO()
 361     {
 362         CleanupHelper cleanup(this);
 363         TStreamOut &stream_out = CreateOutStream();
 364
 365         // If this test is used, the stream must be seekable
 366         CPPUNIT_ASSERT( stream_out.IsSeekable() );
 367
 368         // Try to Get the location in the stream...
 369         CPPUNIT_ASSERT(stream_out.TellO() == 0);
 370         (void)stream_out.PutC('1');
 371         CPPUNIT_ASSERT(stream_out.TellO() == 1);
 372         if (!m_bSimpleTellOTest)
 373         {
 374             // First put some extra data in the stream, so it's not empty.
 375             const char *buf = "1234567890";
 376             (void)stream_out.Write(buf, 10);
 377
 378             off_t pos = stream_out.SeekO(5, wxFromStart);
 379             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 380             (void)stream_out.PutC('1');
 381             CPPUNIT_ASSERT(stream_out.TellO() == 6);
 382             pos = stream_out.SeekO(2, wxFromCurrent);
 383             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 384             pos = stream_out.SeekO(5, wxFromStart);
 385             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 386         }
 387     }
 388
 389 protected:
 390     // Some tests can be configured... here you can find the config settings
 391     bool m_bSimpleTellITest;    // if true, no SeekI will be used by the TellI test.
 392                                 // Default false.
 393     bool m_bSimpleTellOTest;    // if true, no SeekO will be used by the TellI test.
 394                                 // Default false.
 395     bool m_bSeekInvalidBeyondEnd; // if true a SeekI|O beyond the end of the stream should return wxInvalidOffset
 396                                   // Default true.
 397     bool m_bEofAtLastRead;      // Does EOF occure at the moment the last byte is read or when read past the last byte.
 398                                 // Default true.
 399 protected:
 400     TStreamIn &CreateInStream()
 401     {
 402         if (m_pCurrentIn)
 403         {
 404             wxFAIL_MSG(_T("Error in test case, the previouse input stream needs to be delete first!"));
 405         }
 406
 407         m_pCurrentIn = DoCreateInStream();
 408         wxASSERT(m_pCurrentIn != NULL);
 409         return *m_pCurrentIn;
 410     }
 411     TStreamOut &CreateOutStream()
 412     {
 413         if (m_pCurrentOut)
 414         {
 415             wxFAIL_MSG(_T("Error in test case, the previouse output stream needs to be delete first!"));
 416         }
 417
 418         m_pCurrentOut = DoCreateOutStream();
 419         wxASSERT(m_pCurrentOut != NULL);
 420         return *m_pCurrentOut;
 421     }
 422
 423     void DeleteInStream()
 424     {
 425         if (m_pCurrentIn == NULL)
 426             return;
 427         delete m_pCurrentIn;
 428         m_pCurrentIn = NULL;
 429         // Incase something extra needs to be done.
 430         DoDeleteInStream();
 431     }
 432     void DeleteOutStream()
 433     {
 434         if (m_pCurrentOut == NULL)
 435             return;
 436
 437         CPPUNIT_ASSERT(m_pCurrentOut->Close());
 438
 439         delete m_pCurrentOut;
 440         m_pCurrentOut = NULL;
 441         // Incase something extra needs to be done.
 442         DoDeleteOutStream();
 443     }
 444
 445 protected:
 446     // Items that need to be implemented by a derived class!
 447     virtual TStreamIn  *DoCreateInStream() = 0;
 448     virtual TStreamOut *DoCreateOutStream() = 0;
 449     virtual void DoDeleteInStream()  { /* Depends on the base class */ }
 450     virtual void DoDeleteOutStream() { /* Depends on the base class */ }
 451
 452 private:
 453     TStreamIn  *m_pCurrentIn;
 454     TStreamOut *m_pCurrentOut;
 455 };
 456
 457 #endif
 458
 459