/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF 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.
   */
  
  /*
   * This is not the original file distributed by the Apache Software Foundation
   * It has been modified by the Hipparchus project
   */
  package org.hipparchus.analysis.solvers;
  
  import org.hipparchus.analysis.QuinticFunction;
  import org.hipparchus.analysis.UnivariateFunction;
  import org.hipparchus.analysis.function.Sin;
  import org.hipparchus.exception.MathIllegalArgumentException;
  import org.hipparchus.util.FastMath;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  /**
   */
  final class BisectionSolverTest {
      @Test
      void testSinZero() {
          UnivariateFunction f = new Sin();
          double result;
  
          BisectionSolver solver = new BisectionSolver();
          result = solver.solve(100, f, 3, 4);
          assertEquals(FastMath.PI, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 1, 4);
          assertEquals(FastMath.PI, result, solver.getAbsoluteAccuracy());
      }
  
      @Test
      void testQuinticZero() {
          UnivariateFunction f = new QuinticFunction();
          double result;
  
          BisectionSolver solver = new BisectionSolver();
          result = solver.solve(100, f, -0.2, 0.2);
          assertEquals(0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, -0.1, 0.3);
          assertEquals(0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, -0.3, 0.45);
          assertEquals(0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.3, 0.7);
          assertEquals(0.5, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.2, 0.6);
          assertEquals(0.5, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.05, 0.95);
          assertEquals(0.5, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.85, 1.25);
          assertEquals(1.0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.8, 1.2);
          assertEquals(1.0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.85, 1.75);
          assertEquals(1.0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.55, 1.45);
          assertEquals(1.0, result, solver.getAbsoluteAccuracy());
  
          result = solver.solve(100, f, 0.85, 5);
          assertEquals(1.0, result, solver.getAbsoluteAccuracy());
  
          assertTrue(solver.getEvaluations() > 0);
      }
  
      @Test
      void testMath369() {
          UnivariateFunction f = new Sin();
          BisectionSolver solver = new BisectionSolver();
          assertEquals(FastMath.PI, solver.solve(100, f, 3.0, 3.2, 3.1), solver.getAbsoluteAccuracy());
      }
  
     @Test
     void testHipparchusGithub40() {
         assertThrows(MathIllegalArgumentException.class, () -> {
             new BisectionSolver().solve(100, x -> Math.cos(x) + 2, 0.0, 5.0);
         });
     }
 
 }