#if GTEST
#include <gtest/gtest.h>

#include <math.h>
#include <limits>

#include "Angle.h"

#define FLOAT_INFINITY std::numeric_limits<float>::infinity()

TEST(Angle, Normalize) {
	float r = 0;

	r = Angle::Normalize(90);
	EXPECT_FLOAT_EQ(r, 90) << "Normalize 90";

	r = Angle::Normalize(-90);
	EXPECT_FLOAT_EQ(r, -90) << "Normalize -90";

	r = Angle::Normalize(270);
	EXPECT_FLOAT_EQ(r, -90) << "Normalize 270";

	r = Angle::Normalize(270+360);
	EXPECT_FLOAT_EQ(r, -90) << "Normalize 270+360";

	r = Angle::Normalize(-270);
	EXPECT_FLOAT_EQ(r, 90) << "Normalize -270";

	r = Angle::Normalize(-270 - 360);
	EXPECT_FLOAT_EQ(r, 90) << "Normalize -270-360";

	r = Angle::Normalize(0);
	EXPECT_FLOAT_EQ(r, 0) << "Normalize 0";

	if (std::numeric_limits<float>::is_iec559) {
		r = Angle::Normalize(FLOAT_INFINITY);
		EXPECT_FLOAT_EQ(r, FLOAT_INFINITY) << "Normalize INFINITY";

		r = Angle::Normalize(-FLOAT_INFINITY);
		EXPECT_FLOAT_EQ(r, -FLOAT_INFINITY) << "Normalize INFINITY";
	}
}

TEST(Angle, Clamp) {
	float r = 0;

	r = Angle::Clamp(1, 0, 2);
	EXPECT_FLOAT_EQ(r, 1) << "Clamp 1 0 2";

	r = Angle::Clamp(-1, 0, 2);
	EXPECT_FLOAT_EQ(r, 0) << "Clamp -1 0 2";

	r = Angle::Clamp(3, 0, 2);
	EXPECT_FLOAT_EQ(r, 2) << "Clamp 3 0 2";

	r = Angle::Clamp(1, 0, 0);
	EXPECT_FLOAT_EQ(r, 0) << "Clamp 1 0 0";

	r = Angle::Clamp(0, 0, 0);
	EXPECT_FLOAT_EQ(r, 0) << "Clamp 0 0 0";

	r = Angle::Clamp(0, 1, -1);
	EXPECT_FLOAT_EQ(r, 1) << "Clamp 0 1 -1";

	if (std::numeric_limits<float>::is_iec559) {
		r = Angle::Clamp(1, 0, FLOAT_INFINITY);
		EXPECT_FLOAT_EQ(r, 1) << "Clamp 1 0 INFINITY";

		r = Angle::Clamp(1, -FLOAT_INFINITY, 1);
		EXPECT_FLOAT_EQ(r, 1) << "Clamp 1 -INFINITY 1";
	}
}

TEST(Angle, Difference) {
	float r = 0;

	r = Angle::Difference(0, 90);
	EXPECT_FLOAT_EQ(r, 90) << "Difference 0 90";

	r = Angle::Difference(0, -90);
	EXPECT_FLOAT_EQ(r, -90) << "Difference 0 -90";

	r = Angle::Difference(0, 270);
	EXPECT_FLOAT_EQ(r, -90) << "Difference 0 270";

	r = Angle::Difference(0, -270);
	EXPECT_FLOAT_EQ(r, 90) << "Difference 0 -270";

	r = Angle::Difference(90, 0);
	EXPECT_FLOAT_EQ(r, -90) << "Difference 90 0";

	r = Angle::Difference(-90, 0);
	EXPECT_FLOAT_EQ(r, 90) << "Difference -90 0";

	r = Angle::Difference(0, 0);
	EXPECT_FLOAT_EQ(r, 0) << "Difference 0 0";

	r = Angle::Difference(90, 90);
	EXPECT_FLOAT_EQ(r, 0) << "Difference 90 90";

	if (std::numeric_limits<float>::is_iec559) {
		r = Angle::Difference(0, INFINITY);
		EXPECT_FLOAT_EQ(r, INFINITY) << "Difference 0 INFINITY";

		r = Angle::Difference(0, -INFINITY);
		EXPECT_FLOAT_EQ(r, -INFINITY) << "Difference 0 -INFINITY";

		r = Angle::Difference(-INFINITY, INFINITY);
		EXPECT_FLOAT_EQ(r, INFINITY) << "Difference -INFINITY INFINITY";
	}
}

TEST(Angle, MoveTowards) {
	float r = 0;

	r = Angle::MoveTowards(0, 90, 30);
	EXPECT_FLOAT_EQ(r, 30) << "MoveTowards 0 90 30";

	r = Angle::MoveTowards(0, 90, 90);
	EXPECT_FLOAT_EQ(r, 90) << "MoveTowards 0 90 90";

	r = Angle::MoveTowards(0, 90, 180);
	EXPECT_FLOAT_EQ(r, 90) << "MoveTowards 0 90 180";

	r = Angle::MoveTowards(0, 90, 270);
	EXPECT_FLOAT_EQ(r, 90) << "MoveTowards 0 90 270";

	r = Angle::MoveTowards(0, 90, -30);
	EXPECT_FLOAT_EQ(r, -30) << "MoveTowards 0 90 -30";

	r = Angle::MoveTowards(0, -90, -30);
	EXPECT_FLOAT_EQ(r, 30) << "MoveTowards 0 -90 -30";

	r = Angle::MoveTowards(0, -90, -90);
	EXPECT_FLOAT_EQ(r, 90) << "MoveTowards 0 -90 -90";

	r = Angle::MoveTowards(0, -90, -180);
	EXPECT_FLOAT_EQ(r, 180) << "MoveTowards 0 -90 -180";

	r = Angle::MoveTowards(0, -90, -270);
	EXPECT_FLOAT_EQ(r, 270) << "MoveTowards 0 -90 -270";

	r = Angle::MoveTowards(0, 90, 0);
	EXPECT_FLOAT_EQ(r, 0) << "MoveTowards 0 90 0";

	r = Angle::MoveTowards(0, 0, 0);
	EXPECT_FLOAT_EQ(r, 0) << "MoveTowards 0 0 0";

	r = Angle::MoveTowards(0, 0, 30);
	EXPECT_FLOAT_EQ(r, 0) << "MoveTowards 0 0 30";

	if (std::numeric_limits<float>::is_iec559) {
		r = Angle::MoveTowards(0, 90, FLOAT_INFINITY);
		EXPECT_FLOAT_EQ(r, 90) << "MoveTowards 0 90 FLOAT_INFINITY";

		r = Angle::MoveTowards(0, FLOAT_INFINITY, 30);
		EXPECT_FLOAT_EQ(r, 30) << "MoveTowards 0 FLOAT_INFINITY 30";

		r = Angle::MoveTowards(0, -90, -FLOAT_INFINITY);
		EXPECT_FLOAT_EQ(r, FLOAT_INFINITY) << "MoveTowards 0 -90 -FLOAT_INFINITY";

		r = Angle::MoveTowards(0, -FLOAT_INFINITY, -30);
		EXPECT_FLOAT_EQ(r, 30) << "MoveTowards 0 -FLOAT_INFINITY -30";
	}
}

#endif