basegfx/test/B1DRangeTest.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <cppunit/TestAssert.h>
  21 #include <cppunit/TestFixture.h>
  22 #include <cppunit/extensions/HelperMacros.h>
  23
  24 #include <basegfx/range/b1drange.hxx>
  25
  26 namespace basegfx
  27 {
  28 class B1DRangeTest : public CppUnit::TestFixture
  29 {
  30 public:
  31     void checkIntervalAxioms()
  32     {
  33         // test interval axioms
  34         // (http://en.wikipedia.org/wiki/Interval_%28mathematics%29)
  35         B1DRange aRange;
  36         CPPUNIT_ASSERT_MESSAGE("default ctor - empty range", aRange.isEmpty());
  37         CPPUNIT_ASSERT_EQUAL_MESSAGE("center - get cop-out value since range is empty", 0.0,
  38                                      aRange.getCenter());
  39
  40         // degenerate interval
  41         aRange.expand(1);
  42         CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 1.0), aRange);
  43         CPPUNIT_ASSERT_MESSAGE("degenerate range - still, not empty!", !aRange.isEmpty());
  44         CPPUNIT_ASSERT_EQUAL_MESSAGE("degenerate range - size of 0", 0.0, aRange.getRange());
  45         CPPUNIT_ASSERT_MESSAGE("same value as degenerate range - is inside range",
  46                                aRange.isInside(1.0));
  47         CPPUNIT_ASSERT_EQUAL_MESSAGE("center - must be the single range value", 1.0,
  48                                      aRange.getCenter());
  49
  50         // proper interval
  51         aRange.expand(2.0);
  52         CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 2.0), aRange);
  53         CPPUNIT_ASSERT_EQUAL_MESSAGE("proper range - size of 1", 1.0, aRange.getRange());
  54         CPPUNIT_ASSERT_MESSAGE("smaller value of range - is inside *closed* range",
  55                                aRange.isInside(1));
  56         CPPUNIT_ASSERT_MESSAGE("larger value of range - is inside *closed* range",
  57                                aRange.isInside(2));
  58
  59         // center for proper interval that works for ints, too
  60         aRange.expand(3.0);
  61         CPPUNIT_ASSERT_EQUAL(B1DRange(1.0, 3.0), aRange);
  62         CPPUNIT_ASSERT_EQUAL_MESSAGE("center - must be half of the range", 2.0, aRange.getCenter());
  63     }
  64
  65     void checkOverlap()
  66     {
  67         B1DRange aRange(1.0, 3.0);
  68         B1DRange aRange2(0.0, 1.0);
  69
  70         CPPUNIT_ASSERT_MESSAGE("range overlapping *includes* upper bound",
  71                                aRange.overlaps(aRange2));
  72         CPPUNIT_ASSERT_MESSAGE("range overlapping *includes* upper bound, but only barely",
  73                                !aRange.overlapsMore(aRange2));
  74
  75         B1DRange aRange3(0.0, 2.0);
  76         CPPUNIT_ASSERT_MESSAGE("range overlapping is fully overlapping now",
  77                                aRange.overlapsMore(aRange3));
  78     }
  79
  80     void checkIntersect()
  81     {
  82         B1DRange aRange(1.0, 3.0);
  83         B1DRange aRange2(3.0, 4.0);
  84         aRange.intersect(aRange2);
  85         CPPUNIT_ASSERT_MESSAGE("range intersection is yielding empty range!", !aRange.isEmpty());
  86
  87         B1DRange aRange3(5.0, 6.0);
  88         aRange.intersect(aRange3);
  89         CPPUNIT_ASSERT_MESSAGE("range intersection is yielding nonempty range!", aRange.isEmpty());
  90     }
  91
  92     CPPUNIT_TEST_SUITE(B1DRangeTest);
  93     CPPUNIT_TEST(checkIntervalAxioms);
  94     CPPUNIT_TEST(checkOverlap);
  95     CPPUNIT_TEST(checkIntersect);
  96     CPPUNIT_TEST_SUITE_END();
  97 };
  98
  99 } // namespace basegfx
 100
 101 CPPUNIT_TEST_SUITE_REGISTRATION(basegfx::B1DRangeTest);
 102
 103 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */