src/cpml/tests/test-extents.c

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2011  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #include "test-internal.h"
  22
  23
  24 static void
  25 _cpml_test_basic(void)
  26 {
  27     CpmlExtents extents = { 0 };
  28     CpmlExtents extents2 = { 0 };
  29     cairo_bool_t equals;
  30
  31     extents.is_defined = 0;
  32     extents2.is_defined = 0;
  33
  34     g_test_message("By convention, undefined extents are not equal to invalid extents");
  35     equals = cpml_extents_equal(&extents, &extents2);
  36     g_assert(equals);
  37     equals = cpml_extents_equal(&extents, NULL);
  38     g_assert(! equals);
  39     equals = cpml_extents_equal(NULL, &extents);
  40     g_assert(! equals);
  41     equals = cpml_extents_equal(NULL, NULL);
  42     g_assert(equals);
  43
  44     extents.is_defined = 1;
  45     equals = cpml_extents_equal(&extents, &extents2);
  46     g_assert(! equals);
  47
  48     cpml_extents_copy(&extents2, &extents);
  49     equals = cpml_extents_equal(&extents, &extents2);
  50     g_assert(equals);
  51 }
  52
  53 static void
  54 _cpml_test_add(void)
  55 {
  56     CpmlPair org = { 0, 0 };
  57     CpmlPair pair1 = { 1, 2 };
  58     CpmlPair pair2 = { 3, 4 };
  59     CpmlExtents extents = { 0 };
  60     CpmlExtents extents2 = { 0 };
  61     cairo_bool_t equals, is_inside;
  62
  63     extents.is_defined = 0;
  64     extents2.is_defined = 0;
  65
  66     g_test_message("By convention, nothing is inside undefined extents...");
  67     is_inside = cpml_extents_is_inside(&extents, &extents2);
  68     g_assert(! is_inside);
  69     is_inside = cpml_extents_pair_is_inside(&extents, &org);
  70     g_assert(! is_inside);
  71
  72     cpml_extents_pair_add(&extents, &pair1);
  73     equals = cpml_extents_equal(&extents, &extents2);
  74     g_assert(! equals);
  75
  76     g_test_message("...but undefined extents are always inside defined extents");
  77     is_inside = cpml_extents_is_inside(&extents, &extents2);
  78     g_assert(is_inside);
  79
  80     is_inside = cpml_extents_pair_is_inside(&extents, &pair1);
  81     g_assert(is_inside);
  82     is_inside = cpml_extents_pair_is_inside(&extents, &pair2);
  83     g_assert(! is_inside);
  84
  85     cpml_extents_pair_add(&extents2, &pair1);
  86     equals = cpml_extents_equal(&extents, &extents2);
  87     g_assert(equals);
  88     is_inside = cpml_extents_is_inside(&extents, &extents2);
  89     g_assert(is_inside);
  90
  91     cpml_extents_pair_add(&extents, &pair2);
  92     is_inside = cpml_extents_is_inside(&extents, &extents2);
  93     g_assert(is_inside);
  94     is_inside = cpml_extents_pair_is_inside(&extents, &pair1);
  95     g_assert(is_inside);
  96     is_inside = cpml_extents_pair_is_inside(&extents, &pair2);
  97     g_assert(is_inside);
  98
  99     cpml_extents_pair_add(&extents2, &pair2);
 100     is_inside = cpml_extents_is_inside(&extents, &extents2);
 101     g_assert(is_inside);
 102
 103     is_inside = cpml_extents_is_inside(&extents2, &extents);
 104     g_assert(is_inside);
 105
 106     cpml_extents_pair_add(&extents2, &org);
 107     is_inside = cpml_extents_is_inside(&extents, &extents2);
 108     g_assert(! is_inside);
 109
 110     /* The following test fails on FreeBSD 8.2, probably due
 111      * to rounding problems:
 112      *
 113      * is_inside = cpml_extents_is_inside(&extents2, &extents);
 114      * g_assert(is_inside);
 115      */
 116 }
 117
 118 static void
 119 _cpml_test_transform(void)
 120 {
 121     CpmlExtents extents;
 122     cairo_matrix_t matrix;
 123     CpmlPair nord = { 1, 0 };
 124     cairo_bool_t equals, is_inside;
 125
 126     extents.is_defined = 1;
 127     extents.org.x = 2;
 128     extents.org.y = 3;
 129     extents.size.x = 4;
 130     extents.size.y = 5;
 131
 132     is_inside = cpml_extents_pair_is_inside(&extents, &nord);
 133     g_assert(! is_inside);
 134
 135     cairo_matrix_init_translate(&matrix, -extents.org.x - 1, -extents.org.y - 1);
 136     cpml_extents_transform(&extents, &matrix);
 137
 138     is_inside = cpml_extents_pair_is_inside(&extents, &nord);
 139     g_assert(is_inside);
 140
 141     cairo_matrix_init_scale(&matrix, 0.01, 0.01);
 142     cpml_extents_transform(&extents, &matrix);
 143
 144     is_inside = cpml_extents_pair_is_inside(&extents, &nord);
 145     g_assert(! is_inside);
 146 }
 147
 148
 149 int
 150 main(int argc, char *argv[])
 151 {
 152     cpml_test_init(&argc, &argv);
 153
 154     cpml_test_add_func("/cpml/extents/basic", _cpml_test_basic);
 155     cpml_test_add_func("/cpml/extents/add", _cpml_test_add);
 156     cpml_test_add_func("/cpml/extents/transform", _cpml_test_transform);
 157
 158     return g_test_run();
 159 }