tests/misc/metatest.cpp

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