dlls/ole32/tests/hglobalstream.c

   1 /*
   2  * Stream on HGLOBAL Tests
   3  *
   4  * Copyright 2006 Robert Shearman (for CodeWeavers)
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define COBJMACROS
  22
  23 #include <stdarg.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "objbase.h"
  28
  29 #include "wine/test.h"
  30
  31 #define ok_ole_success(hr, func) ok(hr == S_OK, func " failed with error 0x%08x\n", hr)
  32
  33 static char const * const *expected_method_list;
  34
  35 #define CHECK_EXPECTED_METHOD(method_name) \
  36 do { \
  37     ok(*expected_method_list != NULL, "Extra method %s called\n", method_name); \
  38         if (*expected_method_list) \
  39         { \
  40             ok(!strcmp(*expected_method_list, method_name), "Expected %s to be called instead of %s\n", \
  41                *expected_method_list, method_name); \
  42                    expected_method_list++; \
  43         } \
  44 } while(0)
  45
  46 static void test_streamonhglobal(IStream *pStream)
  47 {
  48     const char data[] = "Test String";
  49     ULARGE_INTEGER ull;
  50     LARGE_INTEGER ll;
  51     char buffer[128];
  52     ULONG read;
  53     STATSTG statstg;
  54     HRESULT hr;
  55
  56     ull.QuadPart = sizeof(data);
  57     hr = IStream_SetSize(pStream, ull);
  58     ok_ole_success(hr, "IStream_SetSize");
  59
  60     hr = IStream_Write(pStream, data, sizeof(data), NULL);
  61     ok_ole_success(hr, "IStream_Write");
  62
  63     ll.QuadPart = 0;
  64     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, NULL);
  65     ok_ole_success(hr, "IStream_Seek");
  66
  67     /* should return S_OK, not S_FALSE */
  68     hr = IStream_Read(pStream, buffer, sizeof(buffer), &read);
  69     ok_ole_success(hr, "IStream_Read");
  70     ok(read == sizeof(data), "IStream_Read returned read %d\n", read);
  71
  72     /* ignores HighPart */
  73     ull.u.HighPart = -1;
  74     ull.u.LowPart = 0;
  75     hr = IStream_SetSize(pStream, ull);
  76     ok_ole_success(hr, "IStream_SetSize");
  77
  78     /* IStream_Seek -- NULL position argument */
  79     ll.u.HighPart = 0;
  80     ll.u.LowPart = 0;
  81     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, NULL);
  82     ok_ole_success(hr, "IStream_Seek");
  83
  84     /* IStream_Seek -- valid position argument (seek from current position) */
  85     ull.u.HighPart = 0xCAFECAFE;
  86     ull.u.LowPart = 0xCAFECAFE;
  87     ll.u.HighPart = 0;
  88     ll.u.LowPart = 0;
  89     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
  90     ok_ole_success(hr, "IStream_Seek");
  91     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
  92     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
  93
  94     /* IStream_Seek -- invalid seek argument */
  95     ull.u.HighPart = 0xCAFECAFE;
  96     ull.u.LowPart = 0xCAFECAFE;
  97     ll.u.HighPart = 0;
  98     ll.u.LowPart = 123;
  99     hr = IStream_Seek(pStream, ll, STREAM_SEEK_END+1, &ull);
 100     ok(hr == STG_E_SEEKERROR, "IStream_Seek should have returned STG_E_SEEKERROR instead of 0x%08x\n", hr);
 101     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
 102     ok(ull.u.HighPart == 0, "should not have changed HighPart, got %d\n", ull.u.HighPart);
 103
 104     /* IStream_Seek -- valid position argument (seek to beginning) */
 105     ull.u.HighPart = 0xCAFECAFE;
 106     ull.u.LowPart = 0xCAFECAFE;
 107     ll.u.HighPart = 0;
 108     ll.u.LowPart = 0;
 109     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 110     ok_ole_success(hr, "IStream_Seek");
 111     ok(ull.u.LowPart == 0, "should have set LowPart to 0 instead of %d\n", ull.u.LowPart);
 112     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 113
 114     /* IStream_Seek -- valid position argument (seek to end) */
 115     ull.u.HighPart = 0xCAFECAFE;
 116     ull.u.LowPart = 0xCAFECAFE;
 117     ll.u.HighPart = 0;
 118     ll.u.LowPart = 0;
 119     hr = IStream_Seek(pStream, ll, STREAM_SEEK_END, &ull);
 120     ok_ole_success(hr, "IStream_Seek");
 121     ok(ull.u.LowPart == 0, "should have set LowPart to 0 instead of %d\n", ull.u.LowPart);
 122     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 123
 124     /* IStream_Seek -- ignore HighPart in the move value (seek from current position) */
 125     ll.u.HighPart = 0;
 126     ll.u.LowPart = sizeof(data);
 127     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 128     ok_ole_success(hr, "IStream_Seek");
 129
 130     ull.u.HighPart = 0xCAFECAFE;
 131     ull.u.LowPart = 0xCAFECAFE;
 132     ll.u.HighPart = -1;
 133     ll.u.LowPart = 0;
 134     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 135     ok_ole_success(hr, "IStream_Seek");
 136     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
 137     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 138
 139     /* IStream_Seek -- ignore HighPart in the move value (seek to beginning) */
 140     ll.u.HighPart = 0;
 141     ll.u.LowPart = sizeof(data);
 142     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 143     ok_ole_success(hr, "IStream_Seek");
 144
 145     ull.u.HighPart = 0xCAFECAFE;
 146     ull.u.LowPart = 0xCAFECAFE;
 147     ll.u.HighPart = -1;
 148     ll.u.LowPart = 0;
 149     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 150     ok_ole_success(hr, "IStream_Seek");
 151     ok(ull.u.LowPart == 0, "should have set LowPart to 0 instead of %d\n", ull.u.LowPart);
 152     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 153
 154     /* IStream_Seek -- invalid LowPart value (seek before start of stream) */
 155     ll.u.HighPart = 0;
 156     ll.u.LowPart = sizeof(data);
 157     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 158     ok_ole_success(hr, "IStream_Seek");
 159
 160     ull.u.HighPart = 0xCAFECAFE;
 161     ull.u.LowPart = 0xCAFECAFE;
 162     ll.u.HighPart = 0;
 163     ll.u.LowPart = 0x80000000;
 164     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 165     ok(hr == STG_E_SEEKERROR, "IStream_Seek should have returned STG_E_SEEKERROR instead of 0x%08x\n", hr);
 166     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
 167     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 168
 169     /* IStream_Seek -- valid LowPart value (seek to start of stream) */
 170     ll.u.HighPart = 0;
 171     ll.u.LowPart = sizeof(data);
 172     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 173     ok_ole_success(hr, "IStream_Seek");
 174
 175     ull.u.HighPart = 0xCAFECAFE;
 176     ull.u.LowPart = 0xCAFECAFE;
 177     ll.u.HighPart = 0;
 178     ll.u.LowPart = -(DWORD)sizeof(data);
 179     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 180     ok_ole_success(hr, "IStream_Seek");
 181     ok(ull.u.LowPart == 0, "LowPart set to %d\n", ull.u.LowPart);
 182     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 183
 184     /* IStream_Seek -- invalid LowPart value (seek to start of stream-1) */
 185     ll.u.HighPart = 0;
 186     ll.u.LowPart = sizeof(data);
 187     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 188     ok_ole_success(hr, "IStream_Seek");
 189
 190     ull.u.HighPart = 0xCAFECAFE;
 191     ull.u.LowPart = 0xCAFECAFE;
 192     ll.u.HighPart = 0;
 193     ll.u.LowPart = -(DWORD)sizeof(data)-1;
 194     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 195     ok(hr == STG_E_SEEKERROR, "IStream_Seek should have returned STG_E_SEEKERROR instead of 0x%08x\n", hr);
 196     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
 197     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 198
 199     /* IStream_Seek -- valid LowPart value (seek forward to 0x80000000) */
 200     ll.u.HighPart = 0;
 201     ll.u.LowPart = sizeof(data);
 202     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 203     ok_ole_success(hr, "IStream_Seek");
 204
 205     ull.u.HighPart = 0xCAFECAFE;
 206     ull.u.LowPart = 0xCAFECAFE;
 207     ll.u.HighPart = 0;
 208     ll.u.LowPart = 0x80000000 - sizeof(data);
 209     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 210     ok_ole_success(hr, "IStream_Seek");
 211     ok(ull.u.LowPart == 0x80000000, "LowPart set to %d\n", ull.u.LowPart);
 212     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 213
 214     /* IStream_Seek -- invalid LowPart value (seek to beginning) */
 215     ll.u.HighPart = 0;
 216     ll.u.LowPart = sizeof(data);
 217     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 218     ok_ole_success(hr, "IStream_Seek");
 219
 220     ull.u.HighPart = 0xCAFECAFE;
 221     ull.u.LowPart = 0xCAFECAFE;
 222     ll.u.HighPart = 0;
 223     ll.u.LowPart = 0x80000000;
 224     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 225     ok(hr == STG_E_SEEKERROR, "IStream_Seek should have returned STG_E_SEEKERROR instead of 0x%08x\n", hr);
 226     ok(ull.u.LowPart == sizeof(data), "LowPart set to %d\n", ull.u.LowPart);
 227     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 228
 229     /* IStream_Seek -- valid LowPart value (seek to beginning) */
 230     ull.u.HighPart = 0xCAFECAFE;
 231     ull.u.LowPart = 0xCAFECAFE;
 232     ll.u.HighPart = 0;
 233     ll.u.LowPart = 0x7FFFFFFF;
 234     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 235     ok_ole_success(hr, "IStream_Seek");
 236     ok(ull.u.LowPart == 0x7FFFFFFF, "should have set LowPart to 0x7FFFFFFF instead of %08x\n", ull.u.LowPart);
 237     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 238
 239     /* IStream_Seek -- valid LowPart value (seek from current position) */
 240     ll.u.HighPart = 0;
 241     ll.u.LowPart = 0;
 242     hr = IStream_Seek(pStream, ll, STREAM_SEEK_SET, &ull);
 243     ok_ole_success(hr, "IStream_Seek");
 244
 245     ull.u.HighPart = 0xCAFECAFE;
 246     ull.u.LowPart = 0xCAFECAFE;
 247     ll.u.HighPart = 0;
 248     ll.u.LowPart = 0x7FFFFFFF;
 249     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 250     ok_ole_success(hr, "IStream_Seek");
 251     ok(ull.u.LowPart == 0x7FFFFFFF, "should have set LowPart to 0x7FFFFFFF instead of %08x\n", ull.u.LowPart);
 252     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 253
 254     /* IStream_Seek -- second seek allows you to go past 0x7FFFFFFF size */
 255     ull.u.HighPart = 0xCAFECAFE;
 256     ull.u.LowPart = 0xCAFECAFE;
 257     ll.u.HighPart = 0;
 258     ll.u.LowPart = 9;
 259     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 260     ok_ole_success(hr, "IStream_Seek");
 261     ok(ull.u.LowPart == 0x80000008, "should have set LowPart to 0x80000008 instead of %08x\n", ull.u.LowPart);
 262     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 263
 264     /* IStream_Seek -- seek wraps position/size on integer overflow */
 265     ull.u.HighPart = 0xCAFECAFE;
 266     ull.u.LowPart = 0xCAFECAFE;
 267     ll.u.HighPart = 0;
 268     ll.u.LowPart = 0x7FFFFFFF;
 269     hr = IStream_Seek(pStream, ll, STREAM_SEEK_CUR, &ull);
 270     ok_ole_success(hr, "IStream_Seek");
 271     ok(ull.u.LowPart == 0x00000007, "should have set LowPart to 0x00000007 instead of %08x\n", ull.u.LowPart);
 272     ok(ull.u.HighPart == 0, "should have set HighPart to 0 instead of %d\n", ull.u.HighPart);
 273
 274     hr = IStream_Commit(pStream, STGC_DEFAULT);
 275     ok_ole_success(hr, "IStream_Commit");
 276
 277     hr = IStream_Revert(pStream);
 278     ok_ole_success(hr, "IStream_Revert");
 279
 280     hr = IStream_LockRegion(pStream, ull, ull, LOCK_WRITE);
 281     ok(hr == STG_E_INVALIDFUNCTION, "IStream_LockRegion should have returned STG_E_INVALIDFUNCTION instead of 0x%08x\n", hr);
 282
 283     hr = IStream_Stat(pStream, &statstg, STATFLAG_DEFAULT);
 284     ok_ole_success(hr, "IStream_Stat");
 285     ok(statstg.type == STGTY_STREAM, "statstg.type should have been STGTY_STREAM instead of %d\n", statstg.type);
 286
 287     /* test OOM condition */
 288     ull.u.HighPart = -1;
 289     ull.u.LowPart = -1;
 290     hr = IStream_SetSize(pStream, ull);
 291     ok(hr == E_OUTOFMEMORY || broken(hr == S_OK), /* win9x */
 292        "IStream_SetSize with large size should have returned E_OUTOFMEMORY instead of 0x%08x\n", hr);
 293 }
 294
 295 static HRESULT WINAPI TestStream_QueryInterface(IStream *iface, REFIID riid, void **ppv)
 296 {
 297     if (IsEqualIID(riid, &IID_IUnknown) ||
 298         IsEqualIID(riid, &IID_ISequentialStream) ||
 299         IsEqualIID(riid, &IID_IStream))
 300     {
 301         *ppv = iface;
 302         IStream_AddRef(iface);
 303         return S_OK;
 304     }
 305     *ppv = NULL;
 306     return E_NOINTERFACE;
 307 }
 308
 309 static ULONG WINAPI TestStream_AddRef(IStream *iface)
 310 {
 311     return 2;
 312 }
 313
 314 static ULONG WINAPI TestStream_Release(IStream *iface)
 315 {
 316     return 1;
 317 }
 318
 319 static HRESULT WINAPI TestStream_Read(IStream *iface, void *pv, ULONG cb, ULONG *pcbRead)
 320 {
 321     CHECK_EXPECTED_METHOD("TestStream_Read");
 322     return E_NOTIMPL;
 323 }
 324
 325 static HRESULT WINAPI TestStream_Write(IStream *iface, const void *pv, ULONG cb, ULONG *pcbWritten)
 326 {
 327     CHECK_EXPECTED_METHOD("TestStream_Write");
 328     *pcbWritten = 5;
 329     return S_OK;
 330 }
 331
 332 static HRESULT WINAPI TestStream_Seek(IStream *iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)
 333 {
 334     CHECK_EXPECTED_METHOD("TestStream_Seek");
 335     return E_NOTIMPL;
 336 }
 337
 338 static HRESULT WINAPI TestStream_SetSize(IStream *iface, ULARGE_INTEGER libNewSize)
 339 {
 340     CHECK_EXPECTED_METHOD("TestStream_SetSize");
 341     return E_NOTIMPL;
 342 }
 343
 344 static HRESULT WINAPI TestStream_CopyTo(IStream *iface, IStream *pStream, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten)
 345 {
 346     CHECK_EXPECTED_METHOD("TestStream_CopyTo");
 347     return E_NOTIMPL;
 348 }
 349
 350 static HRESULT WINAPI TestStream_Commit(IStream *iface, DWORD grfCommitFlags)
 351 {
 352     CHECK_EXPECTED_METHOD("TestStream_Commit");
 353     return E_NOTIMPL;
 354 }
 355
 356 static HRESULT WINAPI TestStream_Revert(IStream *iface)
 357 {
 358     CHECK_EXPECTED_METHOD("TestStream_Revert");
 359     return E_NOTIMPL;
 360 }
 361
 362 static HRESULT WINAPI TestStream_LockRegion(IStream *iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
 363 {
 364     CHECK_EXPECTED_METHOD("TestStream_LockRegion");
 365     return E_NOTIMPL;
 366 }
 367
 368 static HRESULT WINAPI TestStream_UnlockRegion(IStream *iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
 369 {
 370     CHECK_EXPECTED_METHOD("TestStream_UnlockRegion");
 371     return E_NOTIMPL;
 372 }
 373
 374 static HRESULT WINAPI TestStream_Stat(IStream *iface, STATSTG *pstatstg, DWORD grfStatFlag)
 375 {
 376     CHECK_EXPECTED_METHOD("TestStream_Stat");
 377     return E_NOTIMPL;
 378 }
 379
 380 static HRESULT WINAPI TestStream_Clone(IStream *iface, IStream **pStream)
 381 {
 382     CHECK_EXPECTED_METHOD("TestStream_Clone");
 383     return E_NOTIMPL;
 384 }
 385
 386 static /*const*/ IStreamVtbl StreamVtbl =
 387 {
 388     TestStream_QueryInterface,
 389     TestStream_AddRef,
 390     TestStream_Release,
 391     TestStream_Read,
 392     TestStream_Write,
 393     TestStream_Seek,
 394     TestStream_SetSize,
 395     TestStream_CopyTo,
 396     TestStream_Commit,
 397     TestStream_Revert,
 398     TestStream_LockRegion,
 399     TestStream_UnlockRegion,
 400     TestStream_Stat,
 401     TestStream_Clone
 402 };
 403
 404 static IStream Test_Stream = { &StreamVtbl };
 405
 406 static void test_copyto(void)
 407 {
 408     IStream *pStream, *pStream2;
 409     HRESULT hr = CreateStreamOnHGlobal(NULL, TRUE, &pStream);
 410     static const char szHello[] = "Hello";
 411     ULARGE_INTEGER cb;
 412     static const char *methods_copyto[] =
 413     {
 414         "TestStream_Write",
 415         NULL
 416     };
 417     ULONG written;
 418     ULARGE_INTEGER ullRead;
 419     ULARGE_INTEGER ullWritten;
 420     ULARGE_INTEGER libNewPosition;
 421     static const LARGE_INTEGER llZero;
 422     char buffer[15];
 423
 424     ok_ole_success(hr, "CreateStreamOnHGlobal");
 425
 426     expected_method_list = methods_copyto;
 427
 428     hr = IStream_Write(pStream, szHello, sizeof(szHello), &written);
 429     ok_ole_success(hr, "IStream_Write");
 430     ok(written == sizeof(szHello), "only %d bytes written\n", written);
 431
 432     hr = IStream_Seek(pStream, llZero, STREAM_SEEK_SET, NULL);
 433     ok_ole_success(hr, "IStream_Seek");
 434
 435     cb.QuadPart = sizeof(szHello);
 436     hr = IStream_CopyTo(pStream, &Test_Stream, cb, &ullRead, &ullWritten);
 437     ok(ullWritten.QuadPart == 5, "ullWritten was %d instead\n", (ULONG)ullWritten.QuadPart);
 438     ok(ullRead.QuadPart == sizeof(szHello), "only %d bytes read\n", (ULONG)ullRead.QuadPart);
 439     ok_ole_success(hr, "IStream_CopyTo");
 440
 441     ok(!*expected_method_list, "Method sequence starting from %s not called\n", *expected_method_list);
 442
 443     hr = IStream_Clone(pStream, &pStream2);
 444     ok_ole_success(hr, "IStream_Clone");
 445
 446     hr = IStream_Seek(pStream2, llZero, STREAM_SEEK_CUR, &libNewPosition);
 447     ok_ole_success(hr, "IStream_Seek");
 448     ok(libNewPosition.QuadPart == sizeof(szHello), "libNewPosition wasn't set correctly for the cloned stream\n");
 449
 450     hr = IStream_Seek(pStream2, llZero, STREAM_SEEK_SET, NULL);
 451     ok_ole_success(hr, "IStream_Seek");
 452
 453     hr = IStream_Read(pStream2, buffer, sizeof(buffer), NULL);
 454     ok_ole_success(hr, "IStream_Read");
 455     ok(!strcmp(buffer, szHello), "read data \"%s\" didn't match originally written data\n", buffer);
 456
 457     IStream_Release(pStream2);
 458     IStream_Release(pStream);
 459 }
 460
 461 static void test_freed_hglobal(void)
 462 {
 463     static const char teststring[] = "this is a test string";
 464     HRESULT hr;
 465     IStream *pStream;
 466     HGLOBAL hglobal;
 467     char *p;
 468     char buffer[sizeof(teststring) + 8];
 469     ULARGE_INTEGER ull;
 470     ULONG read, written;
 471
 472     hglobal = GlobalAlloc(GMEM_DDESHARE|GMEM_NODISCARD|GMEM_MOVEABLE, strlen(teststring) + 1);
 473     ok(hglobal != NULL, "GlobalAlloc failed with error %d\n", GetLastError());
 474     p = GlobalLock(hglobal);
 475     strcpy(p, teststring);
 476     GlobalUnlock(hglobal);
 477
 478     hr = CreateStreamOnHGlobal(hglobal, FALSE, &pStream);
 479     ok_ole_success(hr, "CreateStreamOnHGlobal");
 480
 481     hr = IStream_Read(pStream, buffer, sizeof(buffer), &read);
 482     ok_ole_success(hr, "IStream_Read");
 483     ok(!strcmp(buffer, teststring), "buffer data %s differs\n", buffer);
 484     ok(read == sizeof(teststring) ||
 485        broken(read == ((sizeof(teststring) + 3) & ~3)), /* win9x rounds the size */
 486        "read should be sizeof(teststring) instead of %d\n", read);
 487
 488     GlobalFree(hglobal);
 489
 490     memset(buffer, 0, sizeof(buffer));
 491     read = -1;
 492     hr = IStream_Read(pStream, buffer, sizeof(buffer), &read);
 493     ok_ole_success(hr, "IStream_Read");
 494     ok(buffer[0] == 0, "buffer data should be untouched\n");
 495     ok(read == 0, "read should be 0 instead of %d\n", read);
 496
 497     ull.QuadPart = sizeof(buffer);
 498     hr = IStream_SetSize(pStream, ull);
 499     ok(hr == E_OUTOFMEMORY, "IStream_SetSize with invalid HGLOBAL should return E_OUTOFMEMORY instead of 0x%08x\n", hr);
 500
 501     hr = IStream_Write(pStream, buffer, sizeof(buffer), &written);
 502     ok(hr == E_OUTOFMEMORY, "IStream_Write with invalid HGLOBAL should return E_OUTOFMEMORY instead of 0x%08x\n", hr);
 503     ok(written == 0, "written should be 0 instead of %d\n", written);
 504
 505     IStream_Release(pStream);
 506 }
 507
 508 START_TEST(hglobalstream)
 509 {
 510     HRESULT hr;
 511     IStream *pStream;
 512
 513     hr = CreateStreamOnHGlobal(NULL, TRUE, &pStream);
 514     ok_ole_success(hr, "CreateStreamOnHGlobal");
 515
 516     test_streamonhglobal(pStream);
 517     IStream_Release(pStream);
 518     test_copyto();
 519     test_freed_hglobal();
 520 }