/*
    * 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.geometry.euclidean.oned;
  
  import org.hipparchus.exception.MathIllegalArgumentException;
  import org.hipparchus.geometry.partitioning.Region;
  import org.hipparchus.util.FastMath;
  import org.hipparchus.util.Precision;
  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;
  
  class IntervalTest {
  
      @Test
      void testInterval() {
          Interval interval = new Interval(2.3, 5.7);
          assertEquals(3.4, interval.getSize(), 1.0e-10);
          assertEquals(4.0, interval.getBarycenter(), 1.0e-10);
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(2.3, 1.0e-10));
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(5.7, 1.0e-10));
          assertEquals(Region.Location.OUTSIDE,  interval.checkPoint(1.2, 1.0e-10));
          assertEquals(Region.Location.OUTSIDE,  interval.checkPoint(8.7, 1.0e-10));
          assertEquals(Region.Location.INSIDE,   interval.checkPoint(3.0, 1.0e-10));
          assertEquals(2.3, interval.getInf(), 1.0e-10);
          assertEquals(5.7, interval.getSup(), 1.0e-10);
      }
  
      @Test
      void testTolerance() {
          Interval interval = new Interval(2.3, 5.7);
          assertEquals(Region.Location.OUTSIDE,  interval.checkPoint(1.2, 1.0));
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(1.2, 1.2));
          assertEquals(Region.Location.OUTSIDE,  interval.checkPoint(8.7, 2.9));
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(8.7, 3.1));
          assertEquals(Region.Location.INSIDE,   interval.checkPoint(3.0, 0.6));
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(3.0, 0.8));
      }
  
      @Test
      void testInfinite() {
          Interval interval = new Interval(9.0, Double.POSITIVE_INFINITY);
          assertEquals(Region.Location.BOUNDARY, interval.checkPoint(9.0, 1.0e-10));
          assertEquals(Region.Location.OUTSIDE,  interval.checkPoint(8.4, 1.0e-10));
          for (double e = 1.0; e <= 6.0; e += 1.0) {
              assertEquals(Region.Location.INSIDE,
                                  interval.checkPoint(FastMath.pow(10.0, e), 1.0e-10));
          }
          assertTrue(Double.isInfinite(interval.getSize()));
          assertEquals(9.0, interval.getInf(), 1.0e-10);
          assertTrue(Double.isInfinite(interval.getSup()));
  
      }
  
      @Test
      void testWholeLine() {
          Interval interval = new Interval(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY);
          assertTrue(Double.isInfinite(interval.getSize()));
          assertEquals(Region.Location.INSIDE, interval.checkPoint(-Double.MAX_VALUE, 1.0e-10));
          assertEquals(Region.Location.INSIDE, interval.checkPoint(+Double.MAX_VALUE, 1.0e-10));
      }
  
      @Test
      void testSinglePoint() {
          Interval interval = new Interval(1.0, 1.0);
          assertEquals(0.0, interval.getSize(), Precision.SAFE_MIN);
          assertEquals(1.0, interval.getBarycenter(), Precision.EPSILON);
      }
  
      // MATH-1256
      @Test
      void testStrictOrdering() {
          assertThrows(MathIllegalArgumentException.class, () -> {
              new Interval(0, -1);
          });
      }
  }