/*
    * 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.spherical.oned;
  
  import org.hipparchus.exception.MathRuntimeException;
  import org.hipparchus.util.FastMath;
  import org.hipparchus.util.MathUtils;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertInstanceOf;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  import static org.junit.jupiter.api.Assertions.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  import static org.junit.jupiter.api.Assertions.fail;
  
  class S1PointTest {
  
      @Test
      void testS1Point() {
          for (int k = -2; k < 3; ++k) {
              S1Point p = new S1Point(1.0 + k * MathUtils.TWO_PI);
              assertEquals(FastMath.cos(1.0), p.getVector().getX(), 1.0e-10);
              assertEquals(FastMath.sin(1.0), p.getVector().getY(), 1.0e-10);
              assertFalse(p.isNaN());
          }
      }
  
      @Test
      void testNaN() {
          assertTrue(S1Point.NaN.isNaN());
          assertEquals(S1Point.NaN, new S1Point(Double.NaN));
          assertNotEquals(S1Point.NaN, new S1Point(1.0));
      }
  
      @SuppressWarnings("unlikely-arg-type")
      @Test
      void testEquals() {
          S1Point a = new S1Point(1.0);
          S1Point b = new S1Point(1.0);
          assertEquals(a.hashCode(), b.hashCode());
          assertNotSame(a, b);
          assertEquals(a, b);
          assertEquals(a, a);
          assertNotEquals('a', a);
          assertEquals(S1Point.NaN, S1Point.NaN);
          assertEquals(S1Point.NaN, new S1Point(Double.NaN));
      }
  
      @Test
      void testEqualsIeee754() {
          S1Point a = new S1Point(1.0);
          S1Point b = new S1Point(1.0);
          assertEquals(a.hashCode(), b.hashCode());
          assertNotSame(a, b);
          assertTrue(a.equalsIeee754(b));
          assertTrue(a.equalsIeee754(a));
          assertFalse(a.equalsIeee754('a'));
          assertFalse(S1Point.NaN.equalsIeee754(S1Point.NaN));
          assertFalse(S1Point.NaN.equalsIeee754(new S1Point(Double.NaN)));
      }
  
      @Test
      void testDistance() {
          S1Point a = new S1Point(1.0);
          S1Point b = new S1Point(a.getAlpha() + MathUtils.SEMI_PI);
          assertEquals(MathUtils.SEMI_PI, a.distance(b), 1.0e-10);
      }
  
      @Test
      void testSpace() {
          S1Point a = new S1Point(1.0);
          assertInstanceOf(Sphere1D.class, a.getSpace());
          assertEquals(1, a.getSpace().getDimension());
          try {
              a.getSpace().getSubSpace();
              fail("an exception should have been thrown");
          } catch (MathRuntimeException muoe) {
              // expected
         }
     }
 
     @Test
     void testMoveTowards() {
         final S1Point s1 = new S1Point(2.0);
         final S1Point s2 = new S1Point(4.0);
         for (double r = 0.0; r <= 1.0; r += FastMath.scalb(1.0, -10)) {
             // motion should be linear according to angles
             assertEquals(r * s1.distance(s2), s1.distance(s1.moveTowards(s2, r)), 1.0e-14);
         }
     }
 
 }