basegfx/test/basegfxtools.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  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/utils/keystoplerp.hxx>
  25 #include <basegfx/numeric/ftools.hxx>
  26
  27 using namespace ::basegfx;
  28
  29 namespace basegfxtools
  30 {
  31 class KeyStopLerpTest : public CppUnit::TestFixture
  32 {
  33     utils::KeyStopLerp maKeyStops;
  34
  35     static std::vector<double> getTestVector()
  36     {
  37         std::vector<double> aStops(3);
  38         aStops[0] = 0.1;
  39         aStops[1] = 0.5;
  40         aStops[2] = 0.9;
  41         return aStops;
  42     }
  43
  44 public:
  45     KeyStopLerpTest()
  46         : maKeyStops(getTestVector())
  47     {
  48     }
  49
  50     void test()
  51     {
  52         double fAlpha;
  53         std::ptrdiff_t nIndex;
  54
  55         std::tie(nIndex, fAlpha) = maKeyStops.lerp(-1.0);
  56         CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", std::ptrdiff_t(0), nIndex);
  57         CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", 0.0, fAlpha);
  58
  59         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.1);
  60         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", std::ptrdiff_t(0), nIndex);
  61         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", 0.0, fAlpha);
  62
  63         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.3);
  64         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.3", std::ptrdiff_t(0), nIndex);
  65         CPPUNIT_ASSERT_MESSAGE("0.3", fTools::equal(fAlpha, 0.5));
  66
  67         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.5);
  68         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.5", std::ptrdiff_t(0), nIndex);
  69         CPPUNIT_ASSERT_MESSAGE("0.5", fTools::equal(fAlpha, 1.0));
  70
  71         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.51);
  72         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  73         CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 0.025));
  74
  75         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.9);
  76         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  77         CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 1.0));
  78
  79         std::tie(nIndex, fAlpha) = maKeyStops.lerp(1.0);
  80         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  81         CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE("0.51", 1.0, fAlpha, 1E-12);
  82     }
  83
  84     // Change the following lines only, if you add, remove or rename
  85     // member functions of the current class,
  86     // because these macros are need by auto register mechanism.
  87
  88     CPPUNIT_TEST_SUITE(KeyStopLerpTest);
  89     CPPUNIT_TEST(test);
  90     CPPUNIT_TEST_SUITE_END();
  91 };
  92
  93 CPPUNIT_TEST_SUITE_REGISTRATION(basegfxtools::KeyStopLerpTest);
  94 } // namespace basegfxtools
  95
  96 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */