/*
    * 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.distribution.continuous;
  
  import org.hipparchus.util.Precision;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Test cases for GumbelDistribution.
   */
  public class GumbelDistributionTest extends RealDistributionAbstractTest {
  
      @Test
      public void testParameters() {
          GumbelDistribution d = makeDistribution();
          Assert.assertEquals(0.5, d.getLocation(), Precision.EPSILON);
          Assert.assertEquals(2, d.getScale(), Precision.EPSILON);
      }
  
      @Test
      public void testSupport() {
          GumbelDistribution d = makeDistribution();
          Assert.assertTrue(Double.isInfinite(d.getSupportLowerBound()));
          Assert.assertTrue(Double.isInfinite(d.getSupportUpperBound()));
          Assert.assertTrue(d.isSupportConnected());
      }
  
      @Override
      public GumbelDistribution makeDistribution() {
          return new GumbelDistribution(0.5, 2);
      }
  
      @Override
      public double[] makeCumulativeTestPoints() {
          return new double[] {
              -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
          };
      }
  
      @Override
      public double[] makeDensityTestValues() {
          return new double[] {
              1.258262e-06, 3.594689e-04, 9.115766e-03, 5.321100e-02, 1.274352e-01, 1.777864e-01,
              1.787177e-01, 1.472662e-01, 1.075659e-01, 7.302736e-02, 4.742782e-02
          };
      }
  
      @Override
      public double[] makeCumulativeTestValues() {
          return new double[] {
              1.608760e-07, 7.577548e-05, 3.168165e-03, 3.049041e-02, 1.203923e-01, 2.769203e-01,
              4.589561e-01, 6.235249e-01, 7.508835e-01, 8.404869e-01, 8.999652e-01
          };
      }
  
  }