/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed 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
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/

#include <gtest/gtest.h>

#include "itkArithmeticOpsFunctors.h"

TEST(ArithmeticOpsTest, DivFloorFloat)
{
  using OpType = itk::Functor::DivFloor<float, float, float>;

  OpType           op1;
  constexpr OpType op2;

  EXPECT_EQ(op1, op1);
  EXPECT_EQ(op1, op2);

  op1 = op2;

  EXPECT_EQ(2.0, op1(5.0f, 2.0f));
  EXPECT_EQ(-3.0, op1(-5.0f, 2.0f));
  EXPECT_NO_THROW(op1(5.0f, 0.0f));
}

TEST(ArithmeticOpsTest, DivFloorShort)
{
  using OpType = itk::Functor::DivFloor<short, short, short>;

  OpType           op1;
  constexpr OpType op2;

  EXPECT_EQ(op1, op1);
  EXPECT_EQ(op1, op2);

  op1 = op2;

  EXPECT_EQ(2, op1(5, 2));
  EXPECT_EQ(-3, op1(-5, 2));
  EXPECT_NO_THROW(op1(5, 0));
}

TEST(ArithmeticOpsTest, DivReal)
{

  using OpType = itk::Functor::DivReal<float, float, float>;

  OpType           op1;
  constexpr OpType op2;

  EXPECT_EQ(op1, op1);
  EXPECT_EQ(op1, op2);

  op1 = op2;

  EXPECT_EQ(2.5f, op1(5.0f, 2.0f));
  EXPECT_EQ(-2.5f, op1(-5.0f, 2.0f));
  EXPECT_NO_THROW(op1(5.0f, 0.0f));
}


TEST(ArithmeticOpsTest, UnaryMinus)
{

  using OpType = itk::Functor::UnaryMinus<short, short>;

  OpType           op1;
  constexpr OpType op2;

  EXPECT_EQ(op1, op1);
  EXPECT_EQ(op1, op2);

  op1 = op2;

  EXPECT_EQ(-1, op1(1));
  EXPECT_EQ(2, op1(-2));
}
