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             // Read, we move one byte along.
 139             (void)stream_in.GetC();
 140 #if 0
 141             // EOF behaviour is different in streams, disabled (for now?)
 142
 143             if (m_bEofAtLastRead)
 144                 // EOF should only occure after the last successful get.
 145                 CPPUNIT_ASSERT_MESSAGE("Eof is detected too late.", !(stream_in.LastRead() != 1 && stream_in.Eof()));
 146             else
 147                 // EOF should only occure after a failed get.
 148                 CPPUNIT_ASSERT_MESSAGE("Eof is detected too soon.", !(stream_in.LastRead() == 1 && stream_in.Eof()));
 149 #endif
 150         }
 151
 152         // Check EOF stream state.
 153         CPPUNIT_ASSERT_MESSAGE("EOF is not EOF?", stream_in.Eof());
 154
 155         // Ok we found the end, lets see if we can go past it.
 156         for (size_t i = 0; i < 100; i++)
 157             (void)stream_in.GetC();
 158
 159         // Check for EOF correctness.
 160         CPPUNIT_ASSERT_MESSAGE("EOF is wrong when we read past EOF!", stream_in.Eof());
 161         CPPUNIT_ASSERT_MESSAGE("Last error is not EOF while stream_in.Eof() is true", stream_in.GetLastError() == wxSTREAM_EOF);
 162     }
 163
 164     // Just try to perform a LastRead() on the input stream.
 165     void Input_LastRead()
 166     {
 167         CleanupHelper cleanup(this);
 168         TStreamIn &stream_in = CreateInStream();
 169         CPPUNIT_ASSERT(!stream_in.Eof());
 170
 171         char buf[5];
 172         (void)stream_in.Read(buf, 5);
 173         CPPUNIT_ASSERT(stream_in.LastRead() == 5);
 174         (void)stream_in.GetC();
 175         CPPUNIT_ASSERT(stream_in.LastRead() == 1);
 176     }
 177
 178     // Just try to perform a SeekI() on the input stream.
 179     void Input_SeekI()
 180     {
 181         CleanupHelper cleanup(this);
 182         TStreamIn &stream_in = CreateInStream();
 183         CPPUNIT_ASSERT(!stream_in.Eof());
 184
 185         // Try to Seek in the stream...
 186         // Note: streams not supporting this should register this test
 187         //       with CPPUNIT_TEST_FAIL instead of CPPUNIT_TEST.
 188         CPPUNIT_ASSERT(stream_in.SeekI(2, wxFromStart) == 2);
 189         CPPUNIT_ASSERT(stream_in.SeekI(2, wxFromCurrent) == 4);
 190         // Not sure the following line is correct, so test it differently.
 191         //CPPUNIT_ASSERT(stream_in.SeekI(-2, wxFromEnd) == (off_t)stream_in.GetSize()-2);
 192         CPPUNIT_ASSERT(stream_in.SeekI(-2, wxFromEnd) != wxInvalidOffset);
 193         // Go beyond the stream size.
 194         CPPUNIT_ASSERT((stream_in.SeekI(10, wxFromCurrent) == wxInvalidOffset) == m_bSeekInvalidBeyondEnd);
 195     }
 196
 197     // Just try to perform a TellI() on the input stream.
 198     void Input_TellI()
 199     {
 200         CleanupHelper cleanup(this);
 201         TStreamIn &stream_in = CreateInStream();
 202         CPPUNIT_ASSERT(!stream_in.Eof());
 203
 204         // Try to Get the location in the stream...
 205         CPPUNIT_ASSERT(stream_in.TellI() == 0);
 206         (void)stream_in.GetC();
 207         CPPUNIT_ASSERT(stream_in.TellI() == 1);
 208         if (!m_bSimpleTellITest)
 209         {
 210             wxFileOffset pos = stream_in.SeekI(5, wxFromStart);
 211             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 212             (void)stream_in.GetC();
 213             CPPUNIT_ASSERT(stream_in.TellI() == 6);
 214             pos = stream_in.SeekI(2, wxFromCurrent);
 215             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 216             pos = stream_in.SeekI(5, wxFromStart);
 217             CPPUNIT_ASSERT(stream_in.TellI() == pos);
 218         }
 219     }
 220
 221     // Just try to perform a Peek() on the input stream.
 222     void Input_Peek()
 223     {
 224         CleanupHelper cleanup(this);
 225         TStreamIn &stream_in = CreateInStream();
 226
 227         // Test the full stream
 228         while (stream_in.IsOk())
 229         {
 230             char peekChar = stream_in.Peek();
 231             char getChar = stream_in.GetC();
 232             if (stream_in.LastRead() == 1)
 233                 CPPUNIT_ASSERT(peekChar == getChar);
 234         }
 235     }
 236
 237     // Just try to perform a Ungetch() on the input stream.
 238     void Input_Ungetch()
 239     {
 240         CleanupHelper cleanup(this);
 241         TStreamIn &stream_in = CreateInStream();
 242         CPPUNIT_ASSERT(!stream_in.Eof());
 243
 244         const char *ungetstr = "test";
 245         size_t ungetsize = stream_in.Ungetch(ungetstr, strlen(ungetstr) + 1);
 246         if (ungetsize != 0)
 247         {
 248             CPPUNIT_ASSERT(ungetsize == strlen(ungetstr) + 1);
 249             char buf[10];
 250             (void)stream_in.Read(buf, ungetsize);
 251             CPPUNIT_ASSERT(strcmp(buf, ungetstr) == 0);
 252         }
 253
 254         if (stream_in.Ungetch('a'))
 255         {
 256             CPPUNIT_ASSERT(stream_in.GetC() == 'a');
 257         }
 258     }
 259
 260     /*
 261      * Output stream tests.
 262      */
 263
 264     // Just try to perform a PutC() on the output stream.
 265     void Output_PutC()
 266     {
 267         CleanupHelper cleanup(this);
 268         TStreamOut &stream_out = CreateOutStream();
 269
 270         char *buf = "Some text";
 271         int i;
 272         int len = strlen(buf);
 273         for (i = 0; i < len; i++)
 274             stream_out.PutC(buf[i]);
 275
 276         CPPUNIT_ASSERT(i == stream_out.TellO());
 277     }
 278
 279     // Just try to perform a Write() on the output stream.
 280     void Output_Write()
 281     {
 282         CleanupHelper cleanup(this);
 283         TStreamOut &stream_out = CreateOutStream();
 284
 285         // Do the buffer version.
 286         char *buf = "Some text";
 287         int len = strlen(buf);
 288         (void)stream_out.Write(buf, len);
 289         CPPUNIT_ASSERT(stream_out.TellO() == len);
 290
 291         // Do the Stream version.
 292         TStreamIn &stream_in = CreateInStream();
 293         (void)stream_out.Write(stream_in);
 294         CPPUNIT_ASSERT(stream_out.TellO() > len);
 295     }
 296
 297     // Just try to perform a LastWrite() on the output stream.
 298     void Output_LastWrite()
 299     {
 300         CleanupHelper cleanup(this);
 301         TStreamOut &stream_out = CreateOutStream();
 302
 303         char *buf = "12345";
 304         (void)stream_out.Write(buf, 5);
 305         CPPUNIT_ASSERT(stream_out.LastWrite() == 5);
 306         (void)stream_out.PutC('1');
 307         CPPUNIT_ASSERT(stream_out.LastWrite() == 1);
 308     }
 309
 310     // Just try to perform a SeekO() on the output stream.
 311     void Output_SeekO()
 312     {
 313         CleanupHelper cleanup(this);
 314         TStreamOut &stream_out = CreateOutStream();
 315
 316         // First put some data in the stream, so it is not empty.
 317         char *buf = "1234567890";
 318         (void)stream_out.Write(buf, 10);
 319
 320         // Try to Seek in the stream...
 321         // Note: streams not supporting this should register this test
 322         //       with CPPUNIT_TEST_FAIL instead of CPPUNIT_TEST.
 323         CPPUNIT_ASSERT(stream_out.SeekO(2, wxFromStart) == 2);
 324         CPPUNIT_ASSERT(stream_out.SeekO(2, wxFromCurrent) == 4);
 325         // Not sure the following line is correct, so test it differently.
 326         //CPPUNIT_ASSERT(stream_out.SeekO(-2, wxFromEnd) == (off_t)stream_in.GetSize()-2);
 327         CPPUNIT_ASSERT(stream_out.SeekO(-2, wxFromEnd) != wxInvalidOffset);
 328         // Go beyond the stream size.
 329         CPPUNIT_ASSERT((stream_out.SeekO(10, wxFromCurrent) == wxInvalidOffset) == m_bSeekInvalidBeyondEnd);
 330     }
 331
 332     // Just try to perform a TellO() on the output stream.
 333     void Output_TellO()
 334     {
 335         CleanupHelper cleanup(this);
 336         TStreamOut &stream_out = CreateOutStream();
 337
 338         // Try to Get the location in the stream...
 339         CPPUNIT_ASSERT(stream_out.TellO() == 0);
 340         (void)stream_out.PutC('1');
 341         CPPUNIT_ASSERT(stream_out.TellO() == 1);
 342         if (!m_bSimpleTellOTest)
 343         {
 344             // First put some extra data in the stream, so it's not empty.
 345             char *buf = "1234567890";
 346             (void)stream_out.Write(buf, 10);
 347
 348             off_t pos = stream_out.SeekO(5, wxFromStart);
 349             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 350             (void)stream_out.PutC('1');
 351             CPPUNIT_ASSERT(stream_out.TellO() == 6);
 352             pos = stream_out.SeekO(2, wxFromCurrent);
 353             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 354             pos = stream_out.SeekO(5, wxFromStart);
 355             CPPUNIT_ASSERT(stream_out.TellO() == pos);
 356         }
 357     }
 358
 359 protected:
 360     // Some tests can be configured... here you can find the config settings
 361     bool m_bSimpleTellITest;    // if true, no SeekI will be used by the TellI test.
 362                                 // Default false.
 363     bool m_bSimpleTellOTest;    // if true, no SeekO will be used by the TellI test.
 364                                 // Default false.
 365     bool m_bSeekInvalidBeyondEnd; // if true a SeekI|O beyond the end of the stream should return wxInvalidOffset
 366                                   // Default true.
 367     bool m_bEofAtLastRead;      // Does EOF occure at the moment the last byte is read or when read past the last byte.
 368                                 // Default true.
 369 protected:
 370     TStreamIn &CreateInStream()
 371     {
 372         if (m_pCurrentIn)
 373         {
 374             wxFAIL_MSG(_T("Error in test case, the previouse input stream needs to be delete first!"));
 375         }
 376
 377         m_pCurrentIn = DoCreateInStream();
 378         wxASSERT(m_pCurrentIn != NULL);
 379         return *m_pCurrentIn;
 380     }
 381     TStreamOut &CreateOutStream()
 382     {
 383         if (m_pCurrentOut)
 384         {
 385             wxFAIL_MSG(_T("Error in test case, the previouse output stream needs to be delete first!"));
 386         }
 387
 388         m_pCurrentOut = DoCreateOutStream();
 389         wxASSERT(m_pCurrentOut != NULL);
 390         return *m_pCurrentOut;
 391     }
 392
 393     void DeleteInStream()
 394     {
 395         if (m_pCurrentIn == NULL)
 396             return;
 397         delete m_pCurrentIn;
 398         m_pCurrentIn = NULL;
 399         // Incase something extra needs to be done.
 400         DoDeleteInStream();
 401     }
 402     void DeleteOutStream()
 403     {
 404         if (m_pCurrentOut == NULL)
 405             return;
 406         delete m_pCurrentOut;
 407         m_pCurrentOut = NULL;
 408         // Incase something extra needs to be done.
 409         DoDeleteOutStream();
 410     }
 411
 412 protected:
 413     // Items that need to be implemented by a derived class!
 414     virtual TStreamIn  *DoCreateInStream() = 0;
 415     virtual TStreamOut *DoCreateOutStream() = 0;
 416     virtual void DoDeleteInStream()  { /* Depends on the base class */ }
 417     virtual void DoDeleteOutStream() { /* Depends on the base class */ }
 418
 419 private:
 420     TStreamIn  *m_pCurrentIn;
 421     TStreamOut *m_pCurrentOut;
 422 };
 423
 424 #endif
 425
 426