tests/hashes/hashes.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/hashes/hashes.cpp
   3 // Purpose:     wxHashTable, wxHashMap, wxHashSet unit test
   4 // Author:      Vadim Zeitlin, Mattia Barbon
   5 // Modified:    Mike Wetherell
   6 // Created:     2004-05-16
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2004 Vadim Zeitlin, Mattia Barbon, 2005 M. Wetherell
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ----------------------------------------------------------------------------
  12 // headers
  13 // ----------------------------------------------------------------------------
  14
  15 #include "testprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 #ifndef WX_PRECOMP
  22     #include "wx/wx.h"
  23 #endif // WX_PRECOMP
  24
  25 #include "wx/hash.h"
  26 #include "wx/hashmap.h"
  27 #include "wx/hashset.h"
  28
  29 #if defined wxLongLong_t && !defined wxLongLongIsLong && \
  30         (!defined __VISUALC__ || __VISUALC__ > 1100)    // doesn't work on VC5
  31     #define TEST_LONGLONG
  32 #endif
  33
  34 // --------------------------------------------------------------------------
  35 // helper class for typed/untyped wxHashTable
  36 // --------------------------------------------------------------------------
  37
  38 struct Foo
  39 {
  40     Foo(int n_) { n = n_; count++; }
  41     ~Foo() { count--; }
  42
  43     int n;
  44
  45     static size_t count;
  46 };
  47
  48 size_t Foo::count = 0;
  49
  50 struct FooObject : public wxObject
  51 {
  52     FooObject(int n_) { n = n_; count++; }
  53     ~FooObject() { count--; }
  54
  55     int n;
  56
  57     static size_t count;
  58 };
  59
  60 size_t FooObject::count = 0;
  61
  62 // --------------------------------------------------------------------------
  63 // test class
  64 // --------------------------------------------------------------------------
  65
  66 class HashesTestCase : public CppUnit::TestCase
  67 {
  68 public:
  69     HashesTestCase() { }
  70
  71 private:
  72     CPPUNIT_TEST_SUITE( HashesTestCase );
  73         CPPUNIT_TEST( wxHashTableTest );
  74         CPPUNIT_TEST( wxUntypedHashTableDeleteContents );
  75         CPPUNIT_TEST( wxTypedHashTableTest );
  76         CPPUNIT_TEST( StringHashMapTest );
  77         CPPUNIT_TEST( PtrHashMapTest );
  78         CPPUNIT_TEST( LongHashMapTest );
  79         CPPUNIT_TEST( ULongHashMapTest );
  80         CPPUNIT_TEST( UIntHashMapTest );
  81         CPPUNIT_TEST( IntHashMapTest );
  82         CPPUNIT_TEST( ShortHashMapTest );
  83         CPPUNIT_TEST( UShortHashMapTest );
  84 #ifdef TEST_LONGLONG
  85         CPPUNIT_TEST( LLongHashMapTest );
  86         CPPUNIT_TEST( ULLongHashMapTest );
  87 #endif
  88         CPPUNIT_TEST( wxHashSetTest );
  89     CPPUNIT_TEST_SUITE_END();
  90
  91     void wxHashTableTest();
  92     void wxUntypedHashTableDeleteContents();
  93     void wxTypedHashTableTest();
  94     void StringHashMapTest();
  95     void PtrHashMapTest();
  96     void LongHashMapTest();
  97     void ULongHashMapTest();
  98     void UIntHashMapTest();
  99     void IntHashMapTest();
 100     void ShortHashMapTest();
 101     void UShortHashMapTest();
 102 #ifdef TEST_LONGLONG
 103     void LLongHashMapTest();
 104     void ULLongHashMapTest();
 105 #endif
 106     void wxHashSetTest();
 107
 108     DECLARE_NO_COPY_CLASS(HashesTestCase)
 109 };
 110
 111 // register in the unnamed registry so that these tests are run by default
 112 CPPUNIT_TEST_SUITE_REGISTRATION( HashesTestCase );
 113
 114 // also include in it's own registry so that these tests can be run alone
 115 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( HashesTestCase, "HashesTestCase" );
 116
 117 void HashesTestCase::wxHashTableTest()
 118 {
 119     const int COUNT = 100;
 120
 121     {
 122         wxHashTable hash(wxKEY_INTEGER, 10), hash2(wxKEY_STRING);
 123         wxObject o;
 124         int i;
 125
 126         for ( i = 0; i < COUNT; ++i )
 127             hash.Put(i, &o + i);
 128
 129         hash.BeginFind();
 130         wxHashTable::compatibility_iterator it = hash.Next();
 131         i = 0;
 132
 133         while (it)
 134         {
 135             ++i;
 136             it = hash.Next();
 137         }
 138
 139         CPPUNIT_ASSERT( i == COUNT );
 140
 141         for ( i = 99; i >= 0; --i )
 142             CPPUNIT_ASSERT( hash.Get(i) == &o + i );
 143
 144         for ( i = 0; i < COUNT; ++i )
 145             hash.Put(i, &o + i + 20);
 146
 147         for ( i = 99; i >= 0; --i )
 148             CPPUNIT_ASSERT( hash.Get(i) == &o + i);
 149
 150         for ( i = 0; i < COUNT/2; ++i )
 151             CPPUNIT_ASSERT( hash.Delete(i) == &o + i);
 152
 153         for ( i = COUNT/2; i < COUNT; ++i )
 154             CPPUNIT_ASSERT( hash.Get(i) == &o + i);
 155
 156         for ( i = 0; i < COUNT/2; ++i )
 157             CPPUNIT_ASSERT( hash.Get(i) == &o + i + 20);
 158
 159         for ( i = 0; i < COUNT/2; ++i )
 160             CPPUNIT_ASSERT( hash.Delete(i) == &o + i + 20);
 161
 162         for ( i = 0; i < COUNT/2; ++i )
 163             CPPUNIT_ASSERT( hash.Get(i) == NULL);
 164
 165         hash2.Put(_T("foo"), &o + 1);
 166         hash2.Put(_T("bar"), &o + 2);
 167         hash2.Put(_T("baz"), &o + 3);
 168
 169         CPPUNIT_ASSERT(hash2.Get(_T("moo")) == NULL);
 170         CPPUNIT_ASSERT(hash2.Get(_T("bar")) == &o + 2);
 171
 172         hash2.Put(_T("bar"), &o + 0);
 173
 174         CPPUNIT_ASSERT(hash2.Get(_T("bar")) == &o + 2);
 175     }
 176
 177     // and now some corner-case testing; 3 and 13 hash to the same bucket
 178     {
 179         wxHashTable hash(wxKEY_INTEGER, 10);
 180         wxObject dummy;
 181
 182         hash.Put(3, &dummy);
 183         hash.Delete(3);
 184
 185         CPPUNIT_ASSERT(hash.Get(3) == NULL);
 186
 187         hash.Put(3, &dummy);
 188         hash.Put(13, &dummy);
 189         hash.Delete(3);
 190
 191         CPPUNIT_ASSERT(hash.Get(3) == NULL);
 192
 193         hash.Delete(13);
 194
 195         CPPUNIT_ASSERT(hash.Get(13) == NULL);
 196
 197         hash.Put(3, &dummy);
 198         hash.Put(13, &dummy);
 199         hash.Delete(13);
 200
 201         CPPUNIT_ASSERT(hash.Get(13) == NULL);
 202
 203         hash.Delete(3);
 204
 205         CPPUNIT_ASSERT(hash.Get(3) == NULL);
 206     }
 207
 208     // test for key + value access (specifically that supplying either
 209     // wrong key or wrong value returns NULL)
 210     {
 211         wxHashTable hash(wxKEY_INTEGER, 10);
 212         wxObject dummy;
 213
 214         hash.Put(3, 7, &dummy + 7);
 215         hash.Put(4, 8, &dummy + 8);
 216
 217         CPPUNIT_ASSERT(hash.Get(7) == NULL);
 218         CPPUNIT_ASSERT(hash.Get(3, 7) == &dummy + 7);
 219         CPPUNIT_ASSERT(hash.Get(4) == NULL);
 220         CPPUNIT_ASSERT(hash.Get(3) == NULL);
 221         CPPUNIT_ASSERT(hash.Get(8) == NULL);
 222         CPPUNIT_ASSERT(hash.Get(8, 4) == NULL);
 223
 224         CPPUNIT_ASSERT(hash.Delete(7) == NULL);
 225         CPPUNIT_ASSERT(hash.Delete(3) == NULL);
 226         CPPUNIT_ASSERT(hash.Delete(3, 7) == &dummy + 7);
 227     }
 228
 229 }
 230
 231 void HashesTestCase::wxUntypedHashTableDeleteContents()
 232 {
 233     // need a nested scope for destruction
 234     {
 235         wxHashTable hash;
 236         hash.DeleteContents(true);
 237
 238         CPPUNIT_ASSERT( hash.GetCount() == 0 );
 239         CPPUNIT_ASSERT( FooObject::count == 0 );
 240
 241         static const int hashTestData[] =
 242         {
 243             0, 1, 17, -2, 2, 4, -4, 345, 3, 3, 2, 1,
 244         };
 245
 246         size_t n;
 247         for ( n = 0; n < WXSIZEOF(hashTestData); n++ )
 248         {
 249             hash.Put(hashTestData[n], n, new FooObject(n));
 250         }
 251
 252         CPPUNIT_ASSERT( hash.GetCount() == WXSIZEOF(hashTestData) );
 253         CPPUNIT_ASSERT( FooObject::count == WXSIZEOF(hashTestData) );
 254
 255         // delete from hash without deleting object
 256         FooObject* foo = (FooObject*)hash.Delete(0l);
 257
 258         CPPUNIT_ASSERT( FooObject::count == WXSIZEOF(hashTestData) );
 259         delete foo;
 260         CPPUNIT_ASSERT( FooObject::count == WXSIZEOF(hashTestData) - 1 );
 261     }
 262
 263     // hash destroyed
 264     CPPUNIT_ASSERT( FooObject::count == 0 );
 265 }
 266
 267 WX_DECLARE_HASH(Foo, wxListFoos, wxHashFoos);
 268
 269 void HashesTestCase::wxTypedHashTableTest()
 270 {
 271     // need a nested scope for destruction
 272     {
 273         wxHashFoos hash;
 274         hash.DeleteContents(true);
 275
 276         CPPUNIT_ASSERT( hash.GetCount() == 0 );
 277         CPPUNIT_ASSERT( Foo::count == 0 );
 278
 279         static const int hashTestData[] =
 280         {
 281             0, 1, 17, -2, 2, 4, -4, 345, 3, 3, 2, 1,
 282         };
 283
 284         size_t n;
 285         for ( n = 0; n < WXSIZEOF(hashTestData); n++ )
 286         {
 287             hash.Put(hashTestData[n], n, new Foo(n));
 288         }
 289
 290         CPPUNIT_ASSERT( hash.GetCount() == WXSIZEOF(hashTestData) );
 291         CPPUNIT_ASSERT( Foo::count == WXSIZEOF(hashTestData) );
 292
 293         for ( n = 0; n < WXSIZEOF(hashTestData); n++ )
 294         {
 295             Foo *foo = hash.Get(hashTestData[n], n);
 296
 297             CPPUNIT_ASSERT( foo != NULL );
 298             CPPUNIT_ASSERT( foo->n == (int)n );
 299         }
 300
 301         // element not in hash
 302         CPPUNIT_ASSERT( hash.Get(1234) == NULL );
 303         CPPUNIT_ASSERT( hash.Get(1, 0) == NULL );
 304
 305         // delete from hash without deleting object
 306         Foo* foo = hash.Delete(0);
 307
 308         CPPUNIT_ASSERT( Foo::count == WXSIZEOF(hashTestData) );
 309         delete foo;
 310         CPPUNIT_ASSERT( Foo::count == WXSIZEOF(hashTestData) - 1 );
 311     }
 312
 313     // hash destroyed
 314     CPPUNIT_ASSERT( Foo::count == 0 );
 315 }
 316
 317 // test compilation of basic map types
 318 WX_DECLARE_HASH_MAP( int*, int*, wxPointerHash, wxPointerEqual, myPtrHashMap );
 319 WX_DECLARE_HASH_MAP( long, long, wxIntegerHash, wxIntegerEqual, myLongHashMap );
 320 WX_DECLARE_HASH_MAP( unsigned long, unsigned, wxIntegerHash, wxIntegerEqual,
 321                      myUnsignedHashMap );
 322 WX_DECLARE_HASH_MAP( unsigned int, unsigned, wxIntegerHash, wxIntegerEqual,
 323                      myTestHashMap1 );
 324 WX_DECLARE_HASH_MAP( int, unsigned, wxIntegerHash, wxIntegerEqual,
 325                      myTestHashMap2 );
 326 WX_DECLARE_HASH_MAP( short, unsigned, wxIntegerHash, wxIntegerEqual,
 327                      myTestHashMap3 );
 328 WX_DECLARE_HASH_MAP( unsigned short, unsigned, wxIntegerHash, wxIntegerEqual,
 329                      myTestHashMap4 );
 330
 331 // same as:
 332 // WX_DECLARE_HASH_MAP( wxString, wxString, wxStringHash, wxStringEqual,
 333 //                      myStringHashMap );
 334 WX_DECLARE_STRING_HASH_MAP(wxString, myStringHashMap);
 335
 336 #ifdef TEST_LONGLONG
 337     WX_DECLARE_HASH_MAP( wxLongLong_t, wxLongLong_t,
 338                          wxIntegerHash, wxIntegerEqual, myLLongHashMap );
 339     WX_DECLARE_HASH_MAP( wxULongLong_t, wxULongLong_t,
 340                          wxIntegerHash, wxIntegerEqual, myULLongHashMap );
 341 #endif
 342
 343 // Helpers to generate a key value pair for item 'i', out of a total of 'count'
 344 void MakeKeyValuePair(size_t i, size_t /*count*/, wxString& key, wxString& val)
 345 {
 346     key.clear();
 347     key << i;
 348     val = wxT("A") + key + wxT("C");
 349 }
 350
 351 // for integral keys generate a range of keys that will use all the bits of
 352 // the key type
 353 template <class IntT, class KeyT>
 354 IntT MakeKey(size_t i, size_t count)
 355 {
 356     IntT max = 1;
 357     max <<= sizeof(KeyT) * 8 - 2;
 358     max -= count / 4 + 1;
 359
 360     return max / count * 4 * i + i / 3;
 361 }
 362
 363 // make key/value pairs for integer types
 364 template <class KeyT, class ValueT>
 365 void MakeKeyValuePair(size_t i, size_t count, KeyT& key, ValueT& value)
 366 {
 367     key = MakeKey<KeyT, KeyT>(i, count);
 368     value = wx_truncate_cast(ValueT, key);
 369 }
 370
 371 // make key/values paris for pointer types
 372 template <class T, class ValueT>
 373 void MakeKeyValuePair(size_t i, size_t count, T*& key, ValueT& value)
 374 {
 375     key = (T*)wxUIntToPtr(MakeKey<wxUIntPtr, T*>(i, count));
 376     value = wx_truncate_cast(ValueT, key);
 377 }
 378
 379 // the test
 380 template <class HashMapT>
 381 void HashMapTest()
 382 {
 383     typedef typename HashMapT::value_type::second_type value_type;
 384     typedef typename HashMapT::key_type key_type;
 385     typedef typename HashMapT::iterator Itor;
 386
 387     HashMapT sh(0); // as small as possible
 388     key_type buf;
 389     value_type value;
 390     size_t i;
 391     const size_t count = 10000;
 392
 393     // init with some data
 394     for( i = 0; i < count; ++i )
 395     {
 396         MakeKeyValuePair(i, count, buf, value);
 397         sh[buf] = value;
 398     }
 399
 400     // test that insertion worked
 401     CPPUNIT_ASSERT( sh.size() == count );
 402
 403     for( i = 0; i < count; ++i )
 404     {
 405         MakeKeyValuePair(i, count, buf, value);
 406         CPPUNIT_ASSERT( sh[buf] == value );
 407     }
 408
 409     // check that iterators work
 410     Itor it;
 411     for( i = 0, it = sh.begin(); it != sh.end(); ++it, ++i )
 412     {
 413         CPPUNIT_ASSERT( i != count );
 414         CPPUNIT_ASSERT( it->second == sh[it->first] );
 415     }
 416
 417     CPPUNIT_ASSERT( sh.size() == i );
 418
 419     // test copy ctor, assignment operator
 420     HashMapT h1( sh ), h2( 0 );
 421     h2 = sh;
 422
 423     for( i = 0, it = sh.begin(); it != sh.end(); ++it, ++i )
 424     {
 425         CPPUNIT_ASSERT( h1[it->first] == it->second );
 426         CPPUNIT_ASSERT( h2[it->first] == it->second );
 427     }
 428
 429     // other tests
 430     for( i = 0; i < count; ++i )
 431     {
 432         MakeKeyValuePair(i, count, buf, value);
 433         size_t sz = sh.size();
 434
 435         // test find() and erase(it)
 436         if( i < 100 )
 437         {
 438             it = sh.find( buf );
 439             CPPUNIT_ASSERT( it != sh.end() );
 440
 441             sh.erase( it );
 442
 443             CPPUNIT_ASSERT( sh.find( buf ) == sh.end() );
 444         }
 445         else
 446         // test erase(key)
 447         {
 448             size_t c = sh.erase( buf );
 449             CPPUNIT_ASSERT( c == 1 );
 450             CPPUNIT_ASSERT( sh.find( buf ) == sh.end() );
 451         }
 452
 453         // count should decrease
 454         CPPUNIT_ASSERT( sh.size() == sz - 1 );
 455     }
 456 }
 457
 458 void HashesTestCase::StringHashMapTest() { HashMapTest<myStringHashMap>();   }
 459 void HashesTestCase::PtrHashMapTest()    { HashMapTest<myPtrHashMap>();      }
 460 void HashesTestCase::LongHashMapTest()   { HashMapTest<myLongHashMap>();     }
 461 void HashesTestCase::ULongHashMapTest()  { HashMapTest<myUnsignedHashMap>(); }
 462 void HashesTestCase::UIntHashMapTest()   { HashMapTest<myTestHashMap1>();    }
 463 void HashesTestCase::IntHashMapTest()    { HashMapTest<myTestHashMap2>();    }
 464 void HashesTestCase::ShortHashMapTest()  { HashMapTest<myTestHashMap3>();    }
 465 void HashesTestCase::UShortHashMapTest() { HashMapTest<myTestHashMap4>();    }
 466
 467 #ifdef TEST_LONGLONG
 468 void HashesTestCase::LLongHashMapTest()  { HashMapTest<myLLongHashMap>();    }
 469 void HashesTestCase::ULLongHashMapTest() { HashMapTest<myULLongHashMap>();   }
 470 #endif
 471
 472 #ifdef __VISUALC__
 473     #if __VISUALC__ <= 1200
 474         #pragma warning(disable:4284) // operator->() returns a non-UDT
 475     #endif
 476 #endif // __VISUALC__
 477
 478 // test compilation of basic set types
 479 WX_DECLARE_HASH_SET( int*, wxPointerHash, wxPointerEqual, myPtrHashSet );
 480 WX_DECLARE_HASH_SET( long, wxIntegerHash, wxIntegerEqual, myLongHashSet );
 481 WX_DECLARE_HASH_SET( unsigned long, wxIntegerHash, wxIntegerEqual,
 482                      myUnsignedHashSet );
 483 WX_DECLARE_HASH_SET( unsigned int, wxIntegerHash, wxIntegerEqual,
 484                      myTestHashSet1 );
 485 WX_DECLARE_HASH_SET( int, wxIntegerHash, wxIntegerEqual,
 486                      myTestHashSet2 );
 487 WX_DECLARE_HASH_SET( short, wxIntegerHash, wxIntegerEqual,
 488                      myTestHashSet3 );
 489 WX_DECLARE_HASH_SET( unsigned short, wxIntegerHash, wxIntegerEqual,
 490                      myTestHashSet4 );
 491 WX_DECLARE_HASH_SET( wxString, wxStringHash, wxStringEqual,
 492                      myTestHashSet5 );
 493
 494 struct MyStruct
 495 {
 496     int* ptr;
 497     wxString str;
 498 };
 499
 500 class MyHash
 501 {
 502 public:
 503     unsigned long operator()(const MyStruct& s) const
 504         { return m_dummy(s.ptr); }
 505     MyHash& operator=(const MyHash&) { return *this; }
 506 private:
 507     wxPointerHash m_dummy;
 508 };
 509
 510 class MyEqual
 511 {
 512 public:
 513     bool operator()(const MyStruct& s1, const MyStruct& s2) const
 514         { return s1.ptr == s2.ptr; }
 515     MyEqual& operator=(const MyEqual&) { return *this; }
 516 };
 517
 518 WX_DECLARE_HASH_SET( MyStruct, MyHash, MyEqual, mySet );
 519
 520 typedef myTestHashSet5 wxStringHashSet;
 521
 522 void HashesTestCase::wxHashSetTest()
 523 {
 524     wxStringHashSet set1;
 525
 526     set1.insert( _T("abc") );
 527
 528     CPPUNIT_ASSERT( set1.size() == 1 );
 529
 530     set1.insert( _T("bbc") );
 531     set1.insert( _T("cbc") );
 532
 533     CPPUNIT_ASSERT( set1.size() == 3 );
 534
 535     set1.insert( _T("abc") );
 536
 537     CPPUNIT_ASSERT( set1.size() == 3 );
 538
 539     mySet set2;
 540     int dummy;
 541     MyStruct tmp;
 542
 543     tmp.ptr = &dummy; tmp.str = _T("ABC");
 544     set2.insert( tmp );
 545     tmp.ptr = &dummy + 1;
 546     set2.insert( tmp );
 547     tmp.ptr = &dummy; tmp.str = _T("CDE");
 548     set2.insert( tmp );
 549
 550     CPPUNIT_ASSERT( set2.size() == 2 );
 551
 552     mySet::iterator it = set2.find( tmp );
 553
 554     CPPUNIT_ASSERT( it != set2.end() );
 555     CPPUNIT_ASSERT( it->ptr == &dummy );
 556     CPPUNIT_ASSERT( it->str == _T("ABC") );
 557 }