/*
    * Licensed to the Hipparchus project under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The Hipparchus project 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
    *
    *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  
  package org.hipparchus.analysis.differentiation;
  
  import org.hipparchus.Field;
  import org.hipparchus.analysis.differentiation.DerivativeTest.TestDerivative;
  import org.hipparchus.exception.MathIllegalArgumentException;
  import org.hipparchus.exception.MathRuntimeException;
  import org.hipparchus.exception.NullArgumentException;
  import org.hipparchus.util.FastMath;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  class FieldDerivativeTest {
  
      private static final double TOLERANCE = 1e-10;
  
      @Test
      void testGetReal() {
          // GIVEN
          final double expectedOperation = 0.5;
          final TestDerivative testDerivative = new TestDerivative(expectedOperation);
          final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
          // WHEN
          final double actualOperation = testFieldDerivative.getReal();
          // THEN
          assertEquals(expectedOperation, actualOperation, 0.);
      }
  
      @Test
      void testPow() {
          // GIVEN
          final TestDerivative testDerivative = new TestDerivative(2.);
          final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
          final TestDerivative testDerivative2 = new TestDerivative(3.);
          final TestFieldDerivative testFieldDerivative2 = new TestFieldDerivative(testDerivative2);
          // WHEN
          final TestFieldDerivative actualOperation = testFieldDerivative.pow(testFieldDerivative2);
          // THEN
          final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                  .pow(testDerivative.getValue(), testDerivative2.getValue())));
          assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
      }
  
      @Test
      void testLog10() {
          // GIVEN
          final TestDerivative testDerivative = new TestDerivative(0.5);
          final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
          // WHEN
          final TestFieldDerivative actualOperation = testFieldDerivative.log10();
          // THEN
          final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                  .log10(testDerivative.getValue())));
          assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
      }
  
      @Test
      void testCosh() {
          // GIVEN
          final TestDerivative testDerivative = new TestDerivative(0.5);
          final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
          // WHEN
          final TestFieldDerivative actualOperation = testFieldDerivative.cosh();
          // THEN
          final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                  .cosh(testDerivative.getValue())));
          assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
      }
  
      @Test
      void testSinh() {
          // GIVEN
          final TestDerivative testDerivative = new TestDerivative(0.5);
          final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
          // WHEN
          final TestFieldDerivative actualOperation = testFieldDerivative.sinh();
          // THEN
          final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                  .sinh(testDerivative.getValue())));
          assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
      }
  
     @Test
     void testAcos() {
         // GIVEN
         final TestDerivative testDerivative = new TestDerivative(0.5);
         final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
         // WHEN
         final TestFieldDerivative actualOperation = testFieldDerivative.acos();
         // THEN
         final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                 .acos(testDerivative.getValue())));
         assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
     }
 
     @Test
     void testFloor() {
         // GIVEN
         final TestDerivative testDerivative = new TestDerivative(0.5);
         final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
         // WHEN
         final TestFieldDerivative actualOperation = testFieldDerivative.floor();
         // THEN
         final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                 .floor(testDerivative.getValue())));
         assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
     }
 
     @Test
     void testCeil() {
         // GIVEN
         final TestDerivative testDerivative = new TestDerivative(0.5);
         final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
         // WHEN
         final TestFieldDerivative actualOperation = testFieldDerivative.ceil();
         // THEN
         final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                 .ceil(testDerivative.getValue())));
         assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
     }
 
     @Test
     void testRint() {
         // GIVEN
         final TestDerivative testDerivative = new TestDerivative(0.5);
         final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
         // WHEN
         final TestFieldDerivative actualOperation = testFieldDerivative.rint();
         // THEN
         final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                 .rint(testDerivative.getValue())));
         assertEquals(expectedOperation.getValue().getValue(), actualOperation.getValue().getValue(), TOLERANCE);
     }
 
     @Test
     void testSign() {
         // GIVEN
         final TestDerivative testDerivative = new TestDerivative(0.5);
         final TestFieldDerivative testFieldDerivative = new TestFieldDerivative(testDerivative);
         // WHEN
         final TestFieldDerivative actualOperation = testFieldDerivative.sign();
         // THEN
         final TestFieldDerivative expectedOperation = new TestFieldDerivative(new TestDerivative(FastMath
                 .signum(testDerivative.getValue())));
         assertEquals(expectedOperation, actualOperation);
     }
 
     private static class TestFieldDerivative implements FieldDerivative<TestDerivative, TestFieldDerivative> {
 
         private final TestDerivative value;
 
         TestFieldDerivative (TestDerivative value) {
             this.value = value;
         }
 
         @Override
         public TestFieldDerivative getAddendum() {
             return subtract(getReal());
         }
 
         @Override
         public TestFieldDerivative newInstance(double value) {
             return newInstance(new TestDerivative(value));
         }
 
         @Override
         public TestFieldDerivative scalb(int n) {
             return null;
         }
 
         @Override
         public TestFieldDerivative hypot(TestFieldDerivative y) throws MathIllegalArgumentException {
             return null;
         }
 
         @Override
         public TestFieldDerivative exp() {
             return newInstance(value.exp());
         }
 
         @Override
         public TestFieldDerivative expm1() {
             return null;
         }
 
         @Override
         public TestFieldDerivative log() {
             return newInstance(value.log());
         }
 
         @Override
         public TestFieldDerivative log1p() {
             return null;
         }
 
         @Override
         public TestFieldDerivative cos() {
             return null;
         }
 
         @Override
         public TestFieldDerivative sin() {
             return null;
         }
 
         @Override
         public TestFieldDerivative asin() {
             return newInstance(value.asin());
         }
 
         @Override
         public TestFieldDerivative atan() {
             return null;
         }
 
         @Override
         public TestFieldDerivative atan2(TestFieldDerivative x) throws MathIllegalArgumentException {
             return null;
         }
 
         @Override
         public TestFieldDerivative acosh() {
             return null;
         }
 
         @Override
         public TestFieldDerivative asinh() {
             return null;
         }
 
         @Override
         public TestFieldDerivative atanh() {
             return null;
         }
 
         @Override
         public TestFieldDerivative linearCombination(TestFieldDerivative[] a, TestFieldDerivative[] b) throws MathIllegalArgumentException {
             return null;
         }
 
         @Override
         public TestFieldDerivative linearCombination(TestFieldDerivative a1, TestFieldDerivative b1, TestFieldDerivative a2, TestFieldDerivative b2) {
             return null;
         }
 
         @Override
         public TestFieldDerivative linearCombination(TestFieldDerivative a1, TestFieldDerivative b1, TestFieldDerivative a2, TestFieldDerivative b2, TestFieldDerivative a3, TestFieldDerivative b3) {
             return null;
         }
 
         @Override
         public TestFieldDerivative linearCombination(TestFieldDerivative a1, TestFieldDerivative b1, TestFieldDerivative a2, TestFieldDerivative b2, TestFieldDerivative a3, TestFieldDerivative b3, TestFieldDerivative a4, TestFieldDerivative b4) {
             return null;
         }
 
         @Override
         public TestFieldDerivative remainder(double a) {
             return null;
         }
 
         @Override
         public TestFieldDerivative remainder(TestFieldDerivative a) {
             return null;
         }
 
         @Override
         public TestFieldDerivative copySign(TestFieldDerivative sign) {
             return null;
         }
 
         @Override
         public TestFieldDerivative abs() {
             return null;
         }
 
         @Override
         public TestFieldDerivative add(TestFieldDerivative a) throws NullArgumentException {
             return new TestFieldDerivative(value.add(a.value));
         }
 
         @Override
         public TestFieldDerivative negate() {
             return new TestFieldDerivative(value.negate());
         }
 
         @Override
         public TestFieldDerivative multiply(TestFieldDerivative a) throws NullArgumentException {
             return new TestFieldDerivative(value.multiply(a.value));
         }
 
         @Override
         public TestFieldDerivative reciprocal() throws MathRuntimeException {
             return new TestFieldDerivative(value.reciprocal());
         }
 
         @Override
         public Field<TestFieldDerivative> getField() {
             return null;
         }
 
         @Override
         public int getFreeParameters() {
             return 0;
         }
 
         @Override
         public int getOrder() {
             return 0;
         }
 
         @Override
         public TestDerivative getValue() {
             return value;
         }
 
         @Override
         public TestDerivative getPartialDerivative(int... orders) throws MathIllegalArgumentException {
             return null;
         }
 
         @Override
         public TestFieldDerivative newInstance(TestDerivative value) {
             return new TestFieldDerivative(value);
         }
 
         @Override
         public boolean equals(Object obj) {
             if (obj instanceof TestFieldDerivative) {
                 return value.equals(((TestFieldDerivative) obj).value);
             } else {
                 return false;
             }
         }
     }
 
 }