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() { return { 0.1, 0.5, 0.9 }; }
  36
  37 public:
  38     KeyStopLerpTest()
  39         : maKeyStops(getTestVector())
  40     {
  41     }
  42
  43     void test()
  44     {
  45         double fAlpha;
  46         std::ptrdiff_t nIndex;
  47
  48         std::tie(nIndex, fAlpha) = maKeyStops.lerp(-1.0);
  49         CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", std::ptrdiff_t(0), nIndex);
  50         CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", 0.0, fAlpha);
  51
  52         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.1);
  53         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", std::ptrdiff_t(0), nIndex);
  54         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", 0.0, fAlpha);
  55
  56         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.3);
  57         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.3", std::ptrdiff_t(0), nIndex);
  58         CPPUNIT_ASSERT_MESSAGE("0.3", fTools::equal(fAlpha, 0.5));
  59
  60         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.5);
  61         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.5", std::ptrdiff_t(0), nIndex);
  62         CPPUNIT_ASSERT_MESSAGE("0.5", fTools::equal(fAlpha, 1.0));
  63
  64         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.51);
  65         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  66         CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 0.025));
  67
  68         std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.9);
  69         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  70         CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 1.0));
  71
  72         std::tie(nIndex, fAlpha) = maKeyStops.lerp(1.0);
  73         CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
  74         CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE("0.51", 1.0, fAlpha, 1E-12);
  75     }
  76
  77     // Change the following lines only, if you add, remove or rename
  78     // member functions of the current class,
  79     // because these macros are need by auto register mechanism.
  80
  81     CPPUNIT_TEST_SUITE(KeyStopLerpTest);
  82     CPPUNIT_TEST(test);
  83     CPPUNIT_TEST_SUITE_END();
  84 };
  85
  86 CPPUNIT_TEST_SUITE_REGISTRATION(basegfxtools::KeyStopLerpTest);
  87 } // namespace basegfxtools
  88
  89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */