/*
    * 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.fraction;
  
  import org.hipparchus.Field;
  import org.hipparchus.UnitTestUtils;
  import org.junit.jupiter.api.Test;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotEquals;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class FractionFieldTest {
  
      @Test
      void testZero() {
          assertEquals(Fraction.ZERO, FractionField.getInstance().getZero());
      }
  
      @Test
      void testOne() {
          assertEquals(Fraction.ONE, FractionField.getInstance().getOne());
      }
  
      @SuppressWarnings("unlikely-arg-type")
      @Test
      void testMap() {
          Map<Field<?>, Integer> map = new HashMap<>();
          for (int i = 1; i < 100; ++i) {
              for (int j = 1; j < 100; ++j) {
                  map.put(new Fraction(i, j).getField(), 0);
              }
          }
          // there should be only one field for all fractions
          assertEquals(1, map.size());
          assertEquals(FractionField.getInstance(), map.entrySet().iterator().next().getKey());
          assertNotEquals(FractionField.getInstance(), BigFractionField.getInstance());
      }
  
      @Test
      void testRunTImeClass() {
          assertEquals(Fraction.class, FractionField.getInstance().getRuntimeClass());
      }
  
      @Test
      void testSerial() {
          // deserializing the singleton should give the singleton itself back
          FractionField field = FractionField.getInstance();
          assertTrue(field == UnitTestUtils.serializeAndRecover(field));
      }
  
  }