1 files changed, 89 insertions, 0 deletions
diff --git a/basegfx/test/basegfxtools.cxx b/basegfx/test/basegfxtools.cxx
new file mode 100644
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+++ b/basegfx/test/basegfxtools.cxx
@@ -0,0 +1,89 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+#include <basegfx/utils/keystoplerp.hxx>
+#include <basegfx/numeric/ftools.hxx>
+
+using namespace ::basegfx;
+
+namespace basegfxtools
+{
+class KeyStopLerpTest : public CppUnit::TestFixture
+{
+    utils::KeyStopLerp maKeyStops;
+
+    static std::vector<double> getTestVector() { return { 0.1, 0.5, 0.9 }; }
+
+public:
+    KeyStopLerpTest()
+        : maKeyStops(getTestVector())
+    {
+    }
+
+    void test()
+    {
+        double fAlpha;
+        std::ptrdiff_t nIndex;
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(-1.0);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", std::ptrdiff_t(0), nIndex);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("-1.0", 0.0, fAlpha);
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.1);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", std::ptrdiff_t(0), nIndex);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.1", 0.0, fAlpha);
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.3);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.3", std::ptrdiff_t(0), nIndex);
+        CPPUNIT_ASSERT_MESSAGE("0.3", fTools::equal(fAlpha, 0.5));
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.5);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.5", std::ptrdiff_t(0), nIndex);
+        CPPUNIT_ASSERT_MESSAGE("0.5", fTools::equal(fAlpha, 1.0));
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.51);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
+        CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 0.025));
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(0.9);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
+        CPPUNIT_ASSERT_MESSAGE("0.51", fTools::equal(fAlpha, 1.0));
+
+        std::tie(nIndex, fAlpha) = maKeyStops.lerp(1.0);
+        CPPUNIT_ASSERT_EQUAL_MESSAGE("0.51", std::ptrdiff_t(1), nIndex);
+        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE("0.51", 1.0, fAlpha, 1E-12);
+    }
+
+    // Change the following lines only, if you add, remove or rename
+    // member functions of the current class,
+    // because these macros are need by auto register mechanism.
+
+    CPPUNIT_TEST_SUITE(KeyStopLerpTest);
+    CPPUNIT_TEST(test);
+    CPPUNIT_TEST_SUITE_END();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(basegfxtools::KeyStopLerpTest);
+} // namespace basegfxtools
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */