tests/misc/metatest.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/misc/metatest.cpp
   3 // Purpose:     Test template meta-programming constructs
   4 // Author:      Jaakko Salli
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) the wxWidgets team
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #include "testprec.h"
  11
  12 #ifdef __BORLANDC__
  13 #   pragma hdrstop
  14 #endif
  15
  16 #include "wx/object.h"
  17 #include "wx/utils.h"
  18 #include "wx/meta/pod.h"
  19 #include "wx/meta/movable.h"
  20
  21 #ifndef wxNO_RTTI
  22 #include <typeinfo>
  23 #endif
  24
  25 // ----------------------------------------------------------------------------
  26 // test class
  27 // ----------------------------------------------------------------------------
  28
  29 class MetaProgrammingTestCase : public CppUnit::TestCase
  30 {
  31 public:
  32     MetaProgrammingTestCase() { }
  33
  34 private:
  35     CPPUNIT_TEST_SUITE( MetaProgrammingTestCase );
  36         CPPUNIT_TEST( IsPod );
  37         CPPUNIT_TEST( IsMovable );
  38         CPPUNIT_TEST( ImplicitConversion );
  39         CPPUNIT_TEST( MinMax );
  40     CPPUNIT_TEST_SUITE_END();
  41
  42     void IsPod();
  43     void IsMovable();
  44     void ImplicitConversion();
  45     void MinMax();
  46
  47     DECLARE_NO_COPY_CLASS(MetaProgrammingTestCase)
  48 };
  49
  50 // register in the unnamed registry so that these tests are run by default
  51 CPPUNIT_TEST_SUITE_REGISTRATION( MetaProgrammingTestCase );
  52
  53 // also include in its own registry so that these tests can be run alone
  54 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( MetaProgrammingTestCase,
  55                                        "MetaProgrammingTestCase" );
  56
  57
  58 void MetaProgrammingTestCase::IsPod()
  59 {
  60     CPPUNIT_ASSERT(wxIsPod<bool>::value);
  61     CPPUNIT_ASSERT(wxIsPod<signed int>::value);
  62     CPPUNIT_ASSERT(wxIsPod<double>::value);
  63 #if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
  64     CPPUNIT_ASSERT(wxIsPod<wxObject*>::value);
  65 #endif
  66     CPPUNIT_ASSERT(!wxIsPod<wxObject>::value);
  67 }
  68
  69 void MetaProgrammingTestCase::IsMovable()
  70 {
  71     CPPUNIT_ASSERT(wxIsMovable<bool>::value);
  72     CPPUNIT_ASSERT(wxIsMovable<signed int>::value);
  73     CPPUNIT_ASSERT(wxIsMovable<double>::value);
  74 #if !defined(__VISUALC__) || wxCHECK_VISUALC_VERSION(7)
  75     CPPUNIT_ASSERT(wxIsMovable<wxObject*>::value);
  76 #endif
  77     CPPUNIT_ASSERT(!wxIsMovable<wxObject>::value);
  78 }
  79
  80 void MetaProgrammingTestCase::ImplicitConversion()
  81 {
  82 #ifndef wxNO_RTTI
  83     CPPUNIT_ASSERT(typeid(wxImplicitConversionType<char,int>::value) == typeid(int));
  84     CPPUNIT_ASSERT(typeid(wxImplicitConversionType<int,unsigned>::value) == typeid(unsigned));
  85 #ifdef wxLongLong_t
  86     CPPUNIT_ASSERT(typeid(wxImplicitConversionType<wxLongLong_t,float>::value) == typeid(float));
  87 #endif
  88 #endif // !wxNO_RTTI
  89 }
  90
  91 void MetaProgrammingTestCase::MinMax()
  92 {
  93     // test that wxMax(1.1,1) returns float, not long int
  94     float f = wxMax(1.1f, 1l);
  95     CPPUNIT_ASSERT_EQUAL( 1.1f, f);
  96
  97     // test that comparing signed and unsigned correctly returns unsigned: this
  98     // may seem counterintuitive in this case but this is consistent with the
  99     // standard C conversions
 100     CPPUNIT_ASSERT_EQUAL( 1, wxMin(-1, 1u) );
 101
 102     CPPUNIT_ASSERT_EQUAL( -1., wxClip(-1.5, -1, 1) );
 103     CPPUNIT_ASSERT_EQUAL( 0, wxClip(0, -1, 1) );
 104     CPPUNIT_ASSERT_EQUAL( 1, wxClip(2l, -1, 1) );
 105 }