#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2015 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

// If the library is compiled as a DLL, this ensures symbols are exported
#define NUCLEX_GEOMETRY_SOURCE 1

#include "Nuclex/Geometry/Point2.h"
#include <gtest/gtest.h>

namespace Nuclex { namespace Geometry {

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, PiConstantIsProvided) {
    EXPECT_FLOAT_EQ(3.1415926535897932384626433832795f, Math<float>::Pi);
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, PerigonConstantIsProvided) {
    EXPECT_FLOAT_EQ(Math<float>::Pi * 2.0f, Math<float>::Perigon);
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, SquareRootCanBeCalculated) {
    EXPECT_FLOAT_EQ(3.0f, Math<float>::SquareRoot(9.0f));
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, CanObtainMinimumOfTriad) {
    EXPECT_FLOAT_EQ(1.0f, Math<float>::Min(1.0f, 2.0f, 3.0f));
    EXPECT_FLOAT_EQ(1.0f, Math<float>::Min(3.0f, 1.0f, 2.0f));
    EXPECT_FLOAT_EQ(1.0f, Math<float>::Min(2.0f, 3.0f, 1.0f));
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, CanObtainMaximumOfTriad) {
    EXPECT_FLOAT_EQ(3.0f, Math<float>::Max(1.0f, 2.0f, 3.0f));
    EXPECT_FLOAT_EQ(3.0f, Math<float>::Max(3.0f, 1.0f, 2.0f));
    EXPECT_FLOAT_EQ(3.0f, Math<float>::Max(2.0f, 3.0f, 1.0f));
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, CanFindExtremesOfTriad) {
    std::pair<float, float> expected = std::make_pair(1.0f, 3.0f);

    EXPECT_EQ(expected, Math<float>::Extremes(1.0f, 2.0f, 3.0f));
    EXPECT_EQ(expected, Math<float>::Extremes(1.0f, 3.0f, 2.0f));
    EXPECT_EQ(expected, Math<float>::Extremes(2.0f, 1.0f, 3.0f));
    EXPECT_EQ(expected, Math<float>::Extremes(2.0f, 3.0f, 1.0f));
    EXPECT_EQ(expected, Math<float>::Extremes(3.0f, 1.0f, 2.0f));
    EXPECT_EQ(expected, Math<float>::Extremes(3.0f, 2.0f, 1.0f));
  }

  // ------------------------------------------------------------------------------------------- //

  TEST(MathTest, CanUnwind) {
    EXPECT_FLOAT_EQ(-90.0f, Math<float>::Unwind(270.0f, -180.0f, 180.0f));
    EXPECT_FLOAT_EQ(90.0f, Math<float>::Unwind(-270.0f, -180.0f, 180.0f));

    EXPECT_FLOAT_EQ(0.0f, Math<float>::Unwind(360.0f, -180.0f, 180.0f));
    EXPECT_FLOAT_EQ(0.0f, Math<float>::Unwind(-360.0f, -180.0f, 180.0f));

    EXPECT_FLOAT_EQ(0.0f, Math<float>::Unwind(0.0f, 0.0f, 360.0f));
    EXPECT_FLOAT_EQ(0.0f, Math<float>::Unwind(360.0f, 0.0f, 360.0f));

    EXPECT_FLOAT_EQ(350.0f, Math<float>::Unwind(-10.0f, 0.0f, 360.0f));
    EXPECT_FLOAT_EQ(350.0f, Math<float>::Unwind(-370.0f, 0.0f, 360.0f));
    EXPECT_FLOAT_EQ(-350.0f, Math<float>::Unwind(10.0f, -360.0f, 0.0f));
    EXPECT_FLOAT_EQ(-350.0f, Math<float>::Unwind(370.0f, -360.0f, 0.0f));
  }

  // ------------------------------------------------------------------------------------------- //

}} // namespace Nuclex::Geometry