tests/graphics/ellipsization.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        tests/graphics/ellipsization.cpp
   3 // Purpose:     wxControlBase::*Ellipsize* unit test
   4 // Author:      Francesco Montorsi
   5 // Created:     2010-03-10
   6 // Copyright:   (c) 2010 Francesco Montorsi
   7 ///////////////////////////////////////////////////////////////////////////////
   8
   9 // ----------------------------------------------------------------------------
  10 // headers
  11 // ----------------------------------------------------------------------------
  12
  13 #include "testprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #include "wx/control.h"
  20 #include "wx/dcmemory.h"
  21
  22 // ----------------------------------------------------------------------------
  23 // test class
  24 // ----------------------------------------------------------------------------
  25
  26 class EllipsizationTestCase : public CppUnit::TestCase
  27 {
  28 public:
  29     EllipsizationTestCase() { }
  30
  31 private:
  32     CPPUNIT_TEST_SUITE( EllipsizationTestCase );
  33         CPPUNIT_TEST( NormalCase );
  34         CPPUNIT_TEST( EnoughSpace );
  35         CPPUNIT_TEST( VeryLittleSpace );
  36         CPPUNIT_TEST( HasThreeDots );
  37     CPPUNIT_TEST_SUITE_END();
  38
  39     void NormalCase();
  40     void EnoughSpace();
  41     void VeryLittleSpace();
  42     void HasThreeDots();
  43
  44     DECLARE_NO_COPY_CLASS(EllipsizationTestCase)
  45 };
  46
  47 // register in the unnamed registry so that these tests are run by default
  48 CPPUNIT_TEST_SUITE_REGISTRATION( EllipsizationTestCase );
  49
  50 // also include in its own registry so that these tests can be run alone
  51 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( EllipsizationTestCase, "EllipsizationTestCase" );
  52
  53 void EllipsizationTestCase::NormalCase()
  54 {
  55     wxMemoryDC dc;
  56
  57     static const char *stringsToTest[] =
  58     {
  59         "N",
  60         ".",
  61         "x",
  62         "foobar",
  63         "\xCE\xB1", // U03B1 (GREEK SMALL LETTER ALPHA)
  64         "Another test",
  65         "a very very very very very very very long string",
  66         // alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
  67         "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9",
  68         "\t", "\t\t\t\t\t", "a\tstring\twith\ttabs",
  69         "\n", "\n\n\n\n\n", "a\nstring\nwith\nnewlines",
  70         "&", "&&&&&&&", "a&string&with&newlines",
  71         "\t\n&", "a\t\n&string\t\n&with\t\n&many\t\n&chars"
  72     };
  73
  74     static const int flagsToTest[] =
  75     {
  76         0,
  77         wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS,
  78         wxELLIPSIZE_FLAGS_EXPAND_TABS,
  79         wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS | wxELLIPSIZE_FLAGS_EXPAND_TABS
  80     };
  81
  82     static const wxEllipsizeMode modesToTest[] =
  83     {
  84         wxELLIPSIZE_START,
  85         wxELLIPSIZE_MIDDLE,
  86         wxELLIPSIZE_END
  87     };
  88
  89     int widthsToTest[] = { 50, 100, 150 };
  90
  91     for ( unsigned int s = 0; s < WXSIZEOF(stringsToTest); s++ )
  92     {
  93         const wxString str = wxString::FromUTF8(stringsToTest[s]);
  94
  95         for ( unsigned int  f = 0; f < WXSIZEOF(flagsToTest); f++ )
  96         {
  97             for ( unsigned int m = 0; m < WXSIZEOF(modesToTest); m++ )
  98             {
  99                 for ( unsigned int w = 0; w < WXSIZEOF(widthsToTest); w++ )
 100                 {
 101                     wxString ret = wxControl::Ellipsize
 102                                    (
 103                                     str,
 104                                     dc,
 105                                     modesToTest[m],
 106                                     widthsToTest[w],
 107                                     flagsToTest[f]
 108                                    );
 109
 110                     WX_ASSERT_MESSAGE
 111                     (
 112                      (
 113                         "invalid ellipsization for \"%s\" (%dpx, should be <=%dpx)",
 114                         str,
 115                         dc.GetMultiLineTextExtent(ret).GetWidth(),
 116                         widthsToTest[w]
 117                      ),
 118                      dc.GetMultiLineTextExtent(ret).GetWidth() <= widthsToTest[w]
 119                     );
 120                 }
 121             }
 122         }
 123     }
 124 }
 125
 126
 127 void EllipsizationTestCase::EnoughSpace()
 128 {
 129     // No ellipsization should occur if there's plenty of space.
 130
 131     wxMemoryDC dc;
 132
 133     CPPUNIT_ASSERT_EQUAL("some label",
 134                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_START, 200));
 135     CPPUNIT_ASSERT_EQUAL("some label",
 136                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_MIDDLE, 200));
 137     CPPUNIT_ASSERT_EQUAL("some label",
 138                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_END, 200));
 139 }
 140
 141
 142 void EllipsizationTestCase::VeryLittleSpace()
 143 {
 144     // If there's not enough space, the shortened label should still contain "..." and one character
 145
 146     wxMemoryDC dc;
 147
 148     CPPUNIT_ASSERT_EQUAL("...l",
 149                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_START, 5));
 150     CPPUNIT_ASSERT_EQUAL("s...",
 151                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_MIDDLE, 5));
 152     CPPUNIT_ASSERT_EQUAL("s...",
 153                          wxControl::Ellipsize("some label1", dc, wxELLIPSIZE_MIDDLE, 5));
 154     CPPUNIT_ASSERT_EQUAL("s...",
 155                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_END, 5));
 156 }
 157
 158
 159 void EllipsizationTestCase::HasThreeDots()
 160 {
 161     wxMemoryDC dc;
 162
 163     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_START, 80).StartsWith("...") );
 164     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_START, 80).EndsWith("...") );
 165
 166     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_END, 80).EndsWith("...") );
 167
 168     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).Contains("...") );
 169     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).StartsWith("...") );
 170     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).EndsWith("...") );
 171 }