tests/longlong/longlongtest.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/longlong/longlong.cpp
   3 // Purpose:     wxLongLong unit test
   4 // Author:      Vadim Zeitlin, Wlodzimierz ABX Skiba
   5 // Created:     2004-04-01
   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 #include "wx/longlong.h"
  25 #include "wx/timer.h"
  26
  27 #if wxUSE_LONGLONG
  28
  29 // ----------------------------------------------------------------------------
  30 // helpers for testing
  31 // ----------------------------------------------------------------------------
  32
  33 // number of iterations in loops
  34 #define ITEMS 1000
  35
  36 // make a 64 bit number from 4 16 bit ones
  37 #define MAKE_LL(x1, x2, x3, x4) wxLongLong((x1 << 16) | x2, (x3 << 16) | x3)
  38
  39 // get a random 64 bit number
  40 #define RAND_LL()   MAKE_LL(rand(), rand(), rand(), rand())
  41
  42 static const long testLongs[] =
  43 {
  44     0,
  45     1,
  46     -1,
  47     LONG_MAX,
  48     LONG_MIN,
  49     0x1234,
  50     -0x1234
  51 };
  52
  53 // ----------------------------------------------------------------------------
  54 // test class
  55 // ----------------------------------------------------------------------------
  56
  57 class LongLongTestCase : public CppUnit::TestCase
  58 {
  59 public:
  60     LongLongTestCase();
  61
  62 private:
  63     CPPUNIT_TEST_SUITE( LongLongTestCase );
  64         CPPUNIT_TEST( Conversion );
  65         CPPUNIT_TEST( Comparison );
  66         CPPUNIT_TEST( Addition );
  67         CPPUNIT_TEST( Multiplication );
  68         CPPUNIT_TEST( Division );
  69         CPPUNIT_TEST( BitOperations );
  70         CPPUNIT_TEST( ToString );
  71         CPPUNIT_TEST( LoHi );
  72         CPPUNIT_TEST( Limits );
  73     CPPUNIT_TEST_SUITE_END();
  74
  75     void Conversion();
  76     void Comparison();
  77     void Addition();
  78     void Multiplication();
  79     void Division();
  80     void BitOperations();
  81     void ToString();
  82     void LoHi();
  83     void Limits();
  84
  85     DECLARE_NO_COPY_CLASS(LongLongTestCase)
  86 };
  87
  88 // register in the unnamed registry so that these tests are run by default
  89 CPPUNIT_TEST_SUITE_REGISTRATION( LongLongTestCase );
  90
  91 // also include in it's own registry so that these tests can be run alone
  92 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( LongLongTestCase, "LongLongTestCase" );
  93
  94 LongLongTestCase::LongLongTestCase()
  95 {
  96     srand((unsigned)time(NULL));
  97 }
  98
  99 void LongLongTestCase::Conversion()
 100 {
 101     for ( size_t n = 0; n < ITEMS; n++ )
 102     {
 103         wxLongLong a = RAND_LL();
 104
 105         wxLongLong b(a.GetHi(), a.GetLo());
 106         CPPUNIT_ASSERT( a == b );
 107
 108 #if wxUSE_LONGLONG_WX
 109         wxLongLongWx c(a.GetHi(), a.GetLo());
 110         CPPUNIT_ASSERT( a == c );
 111 #endif
 112
 113 #if wxUSE_LONGLONG_NATIVE
 114         wxLongLongNative d(a.GetHi(), a.GetLo());
 115         CPPUNIT_ASSERT( a == d );
 116 #endif
 117     }
 118 }
 119
 120 void LongLongTestCase::Comparison()
 121 {
 122     static const long ls[2] =
 123     {
 124         0x1234,
 125        -0x1234,
 126     };
 127
 128     wxLongLong lls[2];
 129     lls[0] = ls[0];
 130     lls[1] = ls[1];
 131
 132     for ( size_t n = 0; n < WXSIZEOF(testLongs); n++ )
 133     {
 134         for ( size_t m = 0; m < WXSIZEOF(lls); m++ )
 135         {
 136             CPPUNIT_ASSERT( (lls[m] < testLongs[n]) == (ls[m] < testLongs[n]) );
 137             CPPUNIT_ASSERT( (lls[m] > testLongs[n]) == (ls[m] > testLongs[n]) );
 138             CPPUNIT_ASSERT( (lls[m] <= testLongs[n]) == (ls[m] <= testLongs[n]) );
 139             CPPUNIT_ASSERT( (lls[m] >= testLongs[n]) == (ls[m] >= testLongs[n]) );
 140             CPPUNIT_ASSERT( (lls[m] != testLongs[n]) == (ls[m] != testLongs[n]) );
 141             CPPUNIT_ASSERT( (lls[m] == testLongs[n]) == (ls[m] == testLongs[n]) );
 142         }
 143     }
 144 }
 145
 146 void LongLongTestCase::Addition()
 147 {
 148     for ( size_t n = 0; n < ITEMS; n++ )
 149     {
 150         wxLongLong a = RAND_LL();
 151         wxLongLong b = RAND_LL();
 152         wxLongLong c = a + b;
 153
 154 #if wxUSE_LONGLONG_NATIVE
 155         wxLongLongNative a1 = a;
 156         wxLongLongNative b1 = b;
 157         wxLongLongNative c1 = a1 + b1;
 158         CPPUNIT_ASSERT( c == c1 );
 159 #endif
 160
 161 #if wxUSE_LONGLONG_WX
 162         wxLongLongWx a2 = a;
 163         wxLongLongWx b2 = b;
 164         wxLongLongWx c2 = a2 + b2;
 165         CPPUNIT_ASSERT( c == c2 );
 166 #endif
 167     }
 168 }
 169
 170 void LongLongTestCase::Multiplication()
 171 {
 172     for ( size_t n = 0; n < ITEMS; n++ )
 173     {
 174         wxLongLong a = RAND_LL();
 175         wxLongLong b = RAND_LL();
 176         wxLongLong c = a*b;
 177
 178         wxLongLong a1(a.GetHi(), a.GetLo());
 179         wxLongLong b1(b.GetHi(), b.GetLo());
 180         wxLongLong c1 = a1*b1;
 181         CPPUNIT_ASSERT( c1 == c );
 182
 183 #if wxUSE_LONGLONG_WX
 184         wxLongLongWx a2(a.GetHi(), a.GetLo());
 185         wxLongLongWx b2(b.GetHi(), b.GetLo());
 186         wxLongLongWx c2 = a2*b2;
 187         CPPUNIT_ASSERT( c2 == c );
 188 #endif
 189
 190 #if wxUSE_LONGLONG_NATIVE
 191         wxLongLongNative a3(a.GetHi(), a.GetLo());
 192         wxLongLongNative b3(b.GetHi(), b.GetLo());
 193         wxLongLongNative c3 = a3*b3;
 194         CPPUNIT_ASSERT( c3 == c );
 195 #endif
 196     }
 197 }
 198
 199 void LongLongTestCase::Division()
 200 {
 201     for ( size_t n = 0; n < ITEMS; n++ )
 202     {
 203         // get a random wxLongLong (shifting by 12 the MSB ensures that the
 204         // multiplication will not overflow)
 205         wxLongLong a = MAKE_LL((rand() >> 12), rand(), rand(), rand());
 206
 207         // get a random (but non null) long (not wxLongLong for now) divider
 208         long l;
 209         do
 210         {
 211            l = rand();
 212         }
 213         while ( !l );
 214
 215         wxLongLong q = a / l;
 216         wxLongLong r = a % l;
 217
 218         CPPUNIT_ASSERT( a == ( q * l + r ) );
 219
 220 #if wxUSE_LONGLONG_WX
 221         wxLongLongWx a1(a.GetHi(), a.GetLo());
 222         wxLongLongWx q1 = a1 / l;
 223         wxLongLongWx r1 = a1 % l;
 224         CPPUNIT_ASSERT( q == q1 );
 225         CPPUNIT_ASSERT( r == r1 );
 226         CPPUNIT_ASSERT( a1 == ( q1 * l + r1 ) );
 227 #endif
 228
 229 #if wxUSE_LONGLONG_NATIVE
 230         wxLongLongNative a2(a.GetHi(), a.GetLo());
 231         wxLongLongNative q2 = a2 / l;
 232         wxLongLongNative r2 = a2 % l;
 233         CPPUNIT_ASSERT( q == q2 );
 234         CPPUNIT_ASSERT( r == r2 );
 235         CPPUNIT_ASSERT( a2 == ( q2 * l + r2 ) );
 236 #endif
 237     }
 238 }
 239
 240 void LongLongTestCase::BitOperations()
 241 {
 242     for ( size_t m = 0; m < ITEMS; m++ )
 243     {
 244         wxLongLong a = RAND_LL();
 245
 246         for ( size_t n = 0; n < 33; n++ )
 247         {
 248             wxLongLong b(a.GetHi(), a.GetLo()), c, d = b, e;
 249             d >>= n;
 250             c = b >> n;
 251             CPPUNIT_ASSERT( c == d );
 252             d <<= n;
 253             e = c << n;
 254             CPPUNIT_ASSERT( d == e );
 255
 256 #if wxUSE_LONGLONG_WX
 257             wxLongLongWx b1(a.GetHi(), a.GetLo()), c1, d1 = b1, e1;
 258             d1 >>= n;
 259             c1 = b1 >> n;
 260             CPPUNIT_ASSERT( c1 == d1 );
 261             d1 <<= n;
 262             e1 = c1 << n;
 263             CPPUNIT_ASSERT( d1 == e1 );
 264 #endif
 265
 266 #if wxUSE_LONGLONG_NATIVE
 267             wxLongLongNative b2(a.GetHi(), a.GetLo()), c2, d2 = b2, e2;
 268             d2 >>= n;
 269             c2 = b2 >> n;
 270             CPPUNIT_ASSERT( c2 == d2 );
 271             d2 <<= n;
 272             e2 = c2 << n;
 273             CPPUNIT_ASSERT( d2 == e2 );
 274 #endif
 275         }
 276     }
 277 }
 278
 279 void LongLongTestCase::ToString()
 280 {
 281     wxString s1, s2;
 282
 283     for ( size_t n = 0; n < WXSIZEOF(testLongs); n++ )
 284     {
 285         wxLongLong a = testLongs[n];
 286         s1 = wxString::Format(wxT("%ld"), testLongs[n]);
 287         s2 = a.ToString();
 288         CPPUNIT_ASSERT( s1 == s2 );
 289
 290         s2 = wxEmptyString;
 291         s2 << a;
 292         CPPUNIT_ASSERT( s1 == s2 );
 293
 294 #if wxUSE_LONGLONG_WX
 295         wxLongLongWx a1 = testLongs[n];
 296         s2 = a1.ToString();
 297         CPPUNIT_ASSERT( s1 == s2 );
 298 #endif
 299
 300 #if wxUSE_LONGLONG_NATIVE
 301         wxLongLongNative a2 = testLongs[n];
 302         s2 = a2.ToString();
 303         CPPUNIT_ASSERT( s1 == s2 );
 304 #endif
 305     }
 306
 307     wxLongLong a(0x12345678, 0x87654321);
 308     CPPUNIT_ASSERT( a.ToString() == wxT("1311768467139281697") );
 309     a.Negate();
 310     CPPUNIT_ASSERT( a.ToString() == wxT("-1311768467139281697") );
 311
 312     wxLongLong llMin(-2147483647L - 1L, 0);
 313     CPPUNIT_ASSERT( llMin.ToString() == wxT("-9223372036854775808") );
 314
 315 #if wxUSE_LONGLONG_WX
 316     wxLongLongWx a1(a.GetHi(), a.GetLo());
 317     CPPUNIT_ASSERT( a1.ToString() == wxT("-1311768467139281697") );
 318     a1.Negate();
 319     CPPUNIT_ASSERT( a1.ToString() == wxT("1311768467139281697") );
 320 #endif
 321
 322 #if wxUSE_LONGLONG_NATIVE
 323     wxLongLongNative a2(a.GetHi(), a.GetLo());
 324     CPPUNIT_ASSERT( a2.ToString() == wxT("-1311768467139281697") );
 325     a2.Negate();
 326     CPPUNIT_ASSERT( a2.ToString() == wxT("1311768467139281697") );
 327 #endif
 328
 329 }
 330
 331 void LongLongTestCase::LoHi()
 332 {
 333     wxLongLong ll(123, 456);
 334     CPPUNIT_ASSERT_EQUAL( 456u, ll.GetLo() );
 335     CPPUNIT_ASSERT_EQUAL( 123, ll.GetHi() );
 336
 337     wxULongLong ull(987, 654);
 338     CPPUNIT_ASSERT_EQUAL( 654u, ull.GetLo() );
 339     CPPUNIT_ASSERT_EQUAL( 987u, ull.GetHi() );
 340 }
 341
 342 void LongLongTestCase::Limits()
 343 {
 344     // VC6 doesn't specialize numeric_limits<> for __int64 so skip this test
 345     // for it.
 346 #ifndef __VISUALC6__
 347 #if wxUSE_LONGLONG_NATIVE
 348     CPPUNIT_ASSERT( std::numeric_limits<wxLongLong>::is_specialized );
 349     CPPUNIT_ASSERT( std::numeric_limits<wxULongLong>::is_specialized );
 350
 351     wxULongLong maxval = std::numeric_limits<wxULongLong>::max();
 352     CPPUNIT_ASSERT( maxval.ToDouble() > 0 );
 353 #endif // wxUSE_LONGLONG_NATIVE
 354 #endif // !__VISUALC6__
 355 }
 356
 357 #endif // wxUSE_LONGLONG