tests/graphics/colour.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/graphics/colour.cpp
   3 // Purpose:     wxColour unit test
   4 // Author:      Vadim Zeitlin
   5 // Created:     2009-09-19
   6 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #include "wx/colour.h"
  21
  22 // ----------------------------------------------------------------------------
  23 // helper functions
  24 // ----------------------------------------------------------------------------
  25
  26 namespace
  27 {
  28     // by default colour components values are output incorrectly because they
  29     // are unsigned chars, define a small helper struct which formats them in
  30     // a more useful way
  31     struct ColourChannel
  32     {
  33         ColourChannel(unsigned char value) : m_value(value) { }
  34
  35         unsigned char m_value;
  36     };
  37
  38     std::ostream& operator<<(std::ostream& os, const ColourChannel& cc)
  39     {
  40         os.width(2);
  41         os.fill('0');
  42         os << static_cast<int>(cc.m_value);
  43         return os;
  44     }
  45 } // anonymous namespace
  46
  47 // this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxColour objects
  48 std::ostream& operator<<(std::ostream& os, const wxColour& c)
  49 {
  50     os << std::hex << std::noshowbase
  51        << "("
  52        << ColourChannel(c.Red()) << ", "
  53        << ColourChannel(c.Green()) << ", "
  54        << ColourChannel(c.Blue());
  55
  56     if ( const unsigned char a = c.Alpha() )
  57     {
  58         os << ", " << ColourChannel(a);
  59     }
  60
  61     os << ")";
  62
  63     return os;
  64 }
  65
  66 // ----------------------------------------------------------------------------
  67 // test class
  68 // ----------------------------------------------------------------------------
  69
  70 class ColourTestCase : public CppUnit::TestCase
  71 {
  72 public:
  73     ColourTestCase() { }
  74
  75 private:
  76     CPPUNIT_TEST_SUITE( ColourTestCase );
  77         CPPUNIT_TEST( GetSetRGB );
  78     CPPUNIT_TEST_SUITE_END();
  79
  80     void GetSetRGB();
  81
  82     DECLARE_NO_COPY_CLASS(ColourTestCase)
  83 };
  84
  85 // register in the unnamed registry so that these tests are run by default
  86 CPPUNIT_TEST_SUITE_REGISTRATION( ColourTestCase );
  87
  88 // also include in it's own registry so that these tests can be run alone
  89 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( ColourTestCase, "ColourTestCase" );
  90
  91 void ColourTestCase::GetSetRGB()
  92 {
  93     wxColour c;
  94     c.SetRGB(0x123456);
  95
  96     CPPUNIT_ASSERT_EQUAL( 0x56, (int)c.Red() );
  97     CPPUNIT_ASSERT_EQUAL( 0x34, (int)c.Green() );
  98     CPPUNIT_ASSERT_EQUAL( 0x12, (int)c.Blue() );
  99     CPPUNIT_ASSERT_EQUAL( wxALPHA_OPAQUE, c.Alpha() );
 100
 101     CPPUNIT_ASSERT_EQUAL( wxColour(0x123456), c );
 102     CPPUNIT_ASSERT_EQUAL( 0x123456, c.GetRGB() );
 103
 104     c.SetRGBA(0xaabbccdd);
 105
 106     CPPUNIT_ASSERT_EQUAL( 0xdd, (int)c.Red() );
 107     CPPUNIT_ASSERT_EQUAL( 0xcc, (int)c.Green() );
 108     CPPUNIT_ASSERT_EQUAL( 0xbb, (int)c.Blue() );
 109     CPPUNIT_ASSERT_EQUAL( 0xaa, (int)c.Alpha() );
 110
 111     // FIXME: at least under wxGTK wxColour ctor doesn't take alpha channel
 112     //        into account: bug or feature?
 113     //CPPUNIT_ASSERT_EQUAL( wxColour(0xaabbccdd), c );
 114     CPPUNIT_ASSERT_EQUAL( 0xbbccdd, c.GetRGB() );
 115     CPPUNIT_ASSERT_EQUAL( 0xaabbccdd, c.GetRGBA() );
 116 }
 117