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 // RCS-ID:      $Id$
   7 // Copyright:   (c) 2010 Francesco Montorsi
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 // ----------------------------------------------------------------------------
  11 // headers
  12 // ----------------------------------------------------------------------------
  13
  14 #include "testprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #include "wx/control.h"
  21 #include "wx/dcmemory.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // test class
  25 // ----------------------------------------------------------------------------
  26
  27 class EllipsizationTestCase : public CppUnit::TestCase
  28 {
  29 public:
  30     EllipsizationTestCase() { }
  31
  32 private:
  33     CPPUNIT_TEST_SUITE( EllipsizationTestCase );
  34         CPPUNIT_TEST( NormalCase );
  35         CPPUNIT_TEST( EnoughSpace );
  36         CPPUNIT_TEST( VeryLittleSpace );
  37         CPPUNIT_TEST( HasThreeDots );
  38     CPPUNIT_TEST_SUITE_END();
  39
  40     void NormalCase();
  41     void EnoughSpace();
  42     void VeryLittleSpace();
  43     void HasThreeDots();
  44
  45     DECLARE_NO_COPY_CLASS(EllipsizationTestCase)
  46 };
  47
  48 // register in the unnamed registry so that these tests are run by default
  49 CPPUNIT_TEST_SUITE_REGISTRATION( EllipsizationTestCase );
  50
  51 // also include in its own registry so that these tests can be run alone
  52 CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( EllipsizationTestCase, "EllipsizationTestCase" );
  53
  54 void EllipsizationTestCase::NormalCase()
  55 {
  56     wxMemoryDC dc;
  57
  58     static const char *stringsToTest[] =
  59     {
  60         "N",
  61         ".",
  62         "x",
  63         "foobar",
  64         "\xCE\xB1", // U03B1 (GREEK SMALL LETTER ALPHA)
  65         "Another test",
  66         "a very very very very very very very long string",
  67         // alpha+beta+gamma+delta+epsilon+zeta+eta+theta+iota
  68         "\xCE\xB1\xCE\xB2\xCE\xB3\xCE\xB4\xCE\xB5\xCE\xB6\xCE\xB7\xCE\xB8\xCE\xB9",
  69         "\t", "\t\t\t\t\t", "a\tstring\twith\ttabs",
  70         "\n", "\n\n\n\n\n", "a\nstring\nwith\nnewlines",
  71         "&", "&&&&&&&", "a&string&with&newlines",
  72         "\t\n&", "a\t\n&string\t\n&with\t\n&many\t\n&chars"
  73     };
  74
  75     static const int flagsToTest[] =
  76     {
  77         0,
  78         wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS,
  79         wxELLIPSIZE_FLAGS_EXPAND_TABS,
  80         wxELLIPSIZE_FLAGS_PROCESS_MNEMONICS | wxELLIPSIZE_FLAGS_EXPAND_TABS
  81     };
  82
  83     static const wxEllipsizeMode modesToTest[] =
  84     {
  85         wxELLIPSIZE_START,
  86         wxELLIPSIZE_MIDDLE,
  87         wxELLIPSIZE_END
  88     };
  89
  90     int widthsToTest[] = { 50, 100, 150 };
  91
  92     for ( unsigned int s = 0; s < WXSIZEOF(stringsToTest); s++ )
  93     {
  94         const wxString str = wxString::FromUTF8(stringsToTest[s]);
  95
  96         for ( unsigned int  f = 0; f < WXSIZEOF(flagsToTest); f++ )
  97         {
  98             for ( unsigned int m = 0; m < WXSIZEOF(modesToTest); m++ )
  99             {
 100                 for ( unsigned int w = 0; w < WXSIZEOF(widthsToTest); w++ )
 101                 {
 102                     wxString ret = wxControl::Ellipsize
 103                                    (
 104                                     str,
 105                                     dc,
 106                                     modesToTest[m],
 107                                     widthsToTest[w],
 108                                     flagsToTest[f]
 109                                    );
 110
 111                     WX_ASSERT_MESSAGE
 112                     (
 113                      (
 114                         "invalid ellipsization for \"%s\" (%dpx, should be <=%dpx)",
 115                         str,
 116                         dc.GetMultiLineTextExtent(ret).GetWidth(),
 117                         widthsToTest[w]
 118                      ),
 119                      dc.GetMultiLineTextExtent(ret).GetWidth() <= widthsToTest[w]
 120                     );
 121                 }
 122             }
 123         }
 124     }
 125 }
 126
 127
 128 void EllipsizationTestCase::EnoughSpace()
 129 {
 130     // No ellipsization should occur if there's plenty of space.
 131
 132     wxMemoryDC dc;
 133
 134     CPPUNIT_ASSERT_EQUAL("some label",
 135                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_START, 200));
 136     CPPUNIT_ASSERT_EQUAL("some label",
 137                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_MIDDLE, 200));
 138     CPPUNIT_ASSERT_EQUAL("some label",
 139                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_END, 200));
 140 }
 141
 142
 143 void EllipsizationTestCase::VeryLittleSpace()
 144 {
 145     // If there's not enough space, the shortened label should still contain "..." and one character
 146
 147     wxMemoryDC dc;
 148
 149     CPPUNIT_ASSERT_EQUAL("...l",
 150                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_START, 5));
 151     CPPUNIT_ASSERT_EQUAL("s...",
 152                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_MIDDLE, 5));
 153     CPPUNIT_ASSERT_EQUAL("s...",
 154                          wxControl::Ellipsize("some label1", dc, wxELLIPSIZE_MIDDLE, 5));
 155     CPPUNIT_ASSERT_EQUAL("s...",
 156                          wxControl::Ellipsize("some label", dc, wxELLIPSIZE_END, 5));
 157 }
 158
 159
 160 void EllipsizationTestCase::HasThreeDots()
 161 {
 162     wxMemoryDC dc;
 163
 164     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_START, 80).StartsWith("...") );
 165     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_START, 80).EndsWith("...") );
 166
 167     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_END, 80).EndsWith("...") );
 168
 169     CPPUNIT_ASSERT( wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).Contains("...") );
 170     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).StartsWith("...") );
 171     CPPUNIT_ASSERT( !wxControl::Ellipsize("some longer text", dc, wxELLIPSIZE_MIDDLE, 80).EndsWith("...") );
 172 }