tests/vectors/vectors.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/vectors/vectors.cpp
   3 // Purpose:     wxVector<T> unit test
   4 // Author:      Vaclav Slavik
   5 // Created:     2007-07-07
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2007 Vaclav Slavik
   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/vector.h"
  25
  26 // ----------------------------------------------------------------------------
  27 // simple class capable of detecting leaks of its objects
  28 // ----------------------------------------------------------------------------
  29
  30 class CountedObject
  31 {
  32 public:
  33     CountedObject(int n = 0) : m_n(n) { ms_count++; }
  34     CountedObject(const CountedObject& co) : m_n(co.m_n) { ms_count++; }
  35     ~CountedObject() { ms_count--; }
  36
  37     int GetValue() const { return m_n; }
  38
  39     static int GetCount() { return ms_count; }
  40
  41 private:
  42     static int ms_count;
  43
  44     int m_n;
  45 };
  46
  47 int CountedObject::ms_count = 0;
  48
  49 // ----------------------------------------------------------------------------
  50 // simple class capable of checking its "this" pointer validity
  51 // ----------------------------------------------------------------------------
  52
  53 class SelfPointingObject
  54 {
  55 public:
  56     SelfPointingObject() { m_self = this; }
  57     SelfPointingObject(const SelfPointingObject&) { m_self = this; }
  58     ~SelfPointingObject() { CPPUNIT_ASSERT( this == m_self ); }
  59
  60     // the assignment operator should not modify our "this" pointer so
  61     // implement it just to prevent the default version from doing it
  62     SelfPointingObject& operator=(const SelfPointingObject&) { return *this; }
  63
  64 private:
  65     SelfPointingObject *m_self;
  66 };
  67
  68 // ----------------------------------------------------------------------------
  69 // test class
  70 // ----------------------------------------------------------------------------
  71
  72 class VectorsTestCase : public CppUnit::TestCase
  73 {
  74 public:
  75     VectorsTestCase() {}
  76
  77 private:
  78     CPPUNIT_TEST_SUITE( VectorsTestCase );
  79         CPPUNIT_TEST( PushPopTest );
  80         CPPUNIT_TEST( Insert );
  81         CPPUNIT_TEST( Erase );
  82         CPPUNIT_TEST( Iterators );
  83         CPPUNIT_TEST( Objects );
  84         CPPUNIT_TEST( NonPODs );
  85         CPPUNIT_TEST( Resize );
  86     CPPUNIT_TEST_SUITE_END();
  87
  88     void PushPopTest();
  89     void Insert();
  90     void Erase();
  91     void Iterators();
  92     void Objects();
  93     void NonPODs();
  94     void Resize();
  95
  96     DECLARE_NO_COPY_CLASS(VectorsTestCase)
  97 };
  98
  99 // register in the unnamed registry so that these tests are run by default
 100 CPPUNIT_TEST_SUITE_REGISTRATION( VectorsTestCase );
 101
 102 // also include in it's own registry so that these tests can be run alone
 103 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VectorsTestCase, "VectorsTestCase" );
 104
 105 void VectorsTestCase::PushPopTest()
 106 {
 107     wxVector<int> v;
 108
 109     CPPUNIT_ASSERT( v.size() == 0 );
 110     v.push_back(1);
 111     CPPUNIT_ASSERT( v.size() == 1 );
 112     v.push_back(2);
 113     CPPUNIT_ASSERT( v.size() == 2 );
 114     v.push_back(42);
 115     CPPUNIT_ASSERT( v.size() == 3 );
 116
 117     CPPUNIT_ASSERT( v[0] == 1 );
 118     CPPUNIT_ASSERT( v[1] == 2 );
 119     CPPUNIT_ASSERT( v[2] == 42 );
 120
 121     v.pop_back();
 122     CPPUNIT_ASSERT( v.size() == 2 );
 123     CPPUNIT_ASSERT( v[0] == 1 );
 124     CPPUNIT_ASSERT( v[1] == 2 );
 125
 126     v.pop_back();
 127     CPPUNIT_ASSERT( v.size() == 1 );
 128     CPPUNIT_ASSERT( v[0] == 1 );
 129
 130     v.pop_back();
 131     CPPUNIT_ASSERT( v.size() == 0 );
 132     CPPUNIT_ASSERT( v.empty() );
 133
 134     wxVector<char> vEmpty;
 135 }
 136
 137 void VectorsTestCase::Insert()
 138 {
 139     wxVector<char> v;
 140
 141     v.insert(v.end(), 'a');
 142     CPPUNIT_ASSERT( v.size() == 1 );
 143     CPPUNIT_ASSERT( v[0] == 'a' );
 144
 145     v.insert(v.end(), 'b');
 146     CPPUNIT_ASSERT( v.size() == 2 );
 147     CPPUNIT_ASSERT( v[0] == 'a' );
 148     CPPUNIT_ASSERT( v[1] == 'b' );
 149
 150     v.insert(v.begin(), '0');
 151     CPPUNIT_ASSERT( v.size() == 3 );
 152     CPPUNIT_ASSERT( v[0] == '0' );
 153     CPPUNIT_ASSERT( v[1] == 'a' );
 154     CPPUNIT_ASSERT( v[2] == 'b' );
 155
 156     v.insert(v.begin() + 2, 'X');
 157     CPPUNIT_ASSERT( v.size() == 4 );
 158     CPPUNIT_ASSERT( v[0] == '0' );
 159     CPPUNIT_ASSERT( v[1] == 'a' );
 160     CPPUNIT_ASSERT( v[2] == 'X' );
 161     CPPUNIT_ASSERT( v[3] == 'b' );
 162 }
 163
 164 void VectorsTestCase::Erase()
 165 {
 166     wxVector<int> v;
 167
 168     v.push_back(1);
 169     v.push_back(2);
 170     v.push_back(3);
 171     v.push_back(4);
 172     CPPUNIT_ASSERT( v.size() == 4 );
 173
 174     v.erase(v.begin(), v.end()-1);
 175     CPPUNIT_ASSERT( v.size() == 1 );
 176     CPPUNIT_ASSERT( v[0] == 4 );
 177
 178     v.clear();
 179     v.push_back(1);
 180     v.push_back(2);
 181     v.push_back(3);
 182     v.push_back(4);
 183     CPPUNIT_ASSERT( v.size() == 4 );
 184
 185     v.erase(v.begin());
 186     CPPUNIT_ASSERT( v.size() == 3 );
 187     CPPUNIT_ASSERT( v[0] == 2 );
 188     CPPUNIT_ASSERT( v[1] == 3 );
 189     CPPUNIT_ASSERT( v[2] == 4 );
 190 }
 191
 192 void VectorsTestCase::Iterators()
 193 {
 194     wxVector<int> v;
 195     v.push_back(1);
 196     v.push_back(2);
 197     v.push_back(3);
 198     v.push_back(4);
 199
 200     int value = 1;
 201     for ( wxVector<int>::iterator i = v.begin(); i != v.end(); ++i, ++value )
 202     {
 203         CPPUNIT_ASSERT_EQUAL( value, *i );
 204     }
 205 }
 206
 207 void VectorsTestCase::Objects()
 208 {
 209     wxVector<CountedObject> v;
 210     v.push_back(CountedObject(1));
 211     v.push_back(CountedObject(2));
 212     v.push_back(CountedObject(3));
 213
 214     v.erase(v.begin());
 215     CPPUNIT_ASSERT_EQUAL( 2, v.size() );
 216     CPPUNIT_ASSERT_EQUAL( 2, CountedObject::GetCount() );
 217
 218     v.clear();
 219     CPPUNIT_ASSERT_EQUAL( 0, CountedObject::GetCount() );
 220 }
 221
 222 void VectorsTestCase::NonPODs()
 223 {
 224     wxVector<SelfPointingObject> v;
 225     v.push_back(SelfPointingObject());
 226     v.push_back(SelfPointingObject());
 227     v.push_back(SelfPointingObject());
 228
 229     v.erase(v.begin());
 230     v.clear();
 231
 232     // try the same with wxString, which is not POD, but is implemented in
 233     // a movable way (this won't assert, but would crash or show some memory
 234     // problems under Valgrind if wxString couldn't be safely moved with
 235     // memmove()):
 236     wxVector<wxString> vs;
 237     vs.push_back("one");
 238     vs.push_back("two");
 239     vs.push_back("three");
 240
 241     vs.erase(vs.begin());
 242     vs.clear();
 243 }
 244
 245 void VectorsTestCase::Resize()
 246 {
 247     wxVector<CountedObject> v;
 248     v.resize(3);
 249
 250     CPPUNIT_ASSERT_EQUAL( 3, v.size() );
 251     CPPUNIT_ASSERT_EQUAL( 3, CountedObject::GetCount() );
 252     CPPUNIT_ASSERT_EQUAL( 0, v[0].GetValue() );
 253     CPPUNIT_ASSERT_EQUAL( 0, v[1].GetValue() );
 254     CPPUNIT_ASSERT_EQUAL( 0, v[2].GetValue() );
 255
 256     v.resize(1);
 257     CPPUNIT_ASSERT_EQUAL( 1, v.size() );
 258     CPPUNIT_ASSERT_EQUAL( 1, CountedObject::GetCount() );
 259
 260     v.resize(4, CountedObject(17));
 261     CPPUNIT_ASSERT_EQUAL( 4, v.size() );
 262     CPPUNIT_ASSERT_EQUAL( 4, CountedObject::GetCount() );
 263     CPPUNIT_ASSERT_EQUAL( 0, v[0].GetValue() );
 264     CPPUNIT_ASSERT_EQUAL( 17, v[1].GetValue() );
 265     CPPUNIT_ASSERT_EQUAL( 17, v[2].GetValue() );
 266     CPPUNIT_ASSERT_EQUAL( 17, v[3].GetValue() );
 267 }
 268