#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/Lines/Segment2.h"
#include <gtest/gtest.h>

namespace Nuclex { namespace Geometry { namespace Lines {

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

  TEST(Segment2Test, ParameterConstructorAssignsValues) {
    Segment2<float> segment(Point2<float>(1.2f, 3.4f), Point2<float>(5.6f, 7.8f));
    EXPECT_EQ(1.2f, segment.Start.X);
    EXPECT_EQ(3.4f, segment.Start.Y);
    EXPECT_EQ(5.6f, segment.End.X);
    EXPECT_EQ(7.8f, segment.End.Y);
  }

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

  TEST(Segment2Test, SquaredLengthCanBeCalculated) {
    Segment2<float> segment(Point2<float>(1.0f, 2.0f), Point2<float>(4.0f, 8.0f));
    EXPECT_EQ(3 * 3 + 6 * 6, segment.GetSquaredLength());
  }

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

  TEST(Segment2Test, SquaredLengthOfDegenerateSegmentIsZero) {
    Segment2<float> segment(Point2<float>(1.0f, 2.0f), Point2<float>(1.0f, 2.0f));
    EXPECT_EQ(0.0f, segment.GetSquaredLength());
  }

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

  TEST(Segment2Test, LengthCanBeCalculated) {
    Segment2<float> segment(Point2<float>(1.0f, 2.0f), Point2<float>(4.0f, 8.0f));
    EXPECT_EQ(sqrtf(3 * 3 + 6 * 6), segment.GetLength());
  }

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

  TEST(Segment2Test, LengthOfDegenerateSegmentIsZero) {
    Segment2<float> segment(Point2<float>(1.0f, 2.0f), Point2<float>(1.0f, 2.0f));
    EXPECT_EQ(0.0f, segment.GetLength());
  }

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

  TEST(Segment2Test, LineSegmentCanBeShiftedByCoordinates) {
    Segment2<float> segment(Point2<float>(1.2f, 3.4f), Point2<float>(5.6f, 7.8f));
    segment.ShiftBy(10.0f, 100.0f);

    EXPECT_EQ(11.2f, segment.Start.X);
    EXPECT_EQ(103.4f, segment.Start.Y);
    EXPECT_EQ(15.6f, segment.End.X);
    EXPECT_EQ(107.8f, segment.End.Y);
  }

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

  TEST(Segment2Test, LineSegmentCanBeShiftedByVectors) {
    Segment2<float> segment(Point2<float>(1.2f, 3.4f), Point2<float>(5.6f, 7.8f));
    segment.ShiftBy(Vector2<float>(100.0f, 10.0f));

    EXPECT_EQ(101.2f, segment.Start.X);
    EXPECT_EQ(13.4f, segment.Start.Y);
    EXPECT_EQ(105.6f, segment.End.X);
    EXPECT_EQ(17.8f, segment.End.Y);
  }

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

}}} // namespace Nuclex::Geometry::Lines