1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.nabla.forward;
18  
19  import org.apache.commons.nabla.AbstractMathTest;
20  import org.junit.Test;
21  
22  public class AtanhGeneratorTest extends AbstractMathTest {
23  
24      @Test
25      public void testReference(){
26          checkReference(new ReferenceFunction() {
27              public double value(double t) { return MathExtensions.atanh(t); }
28              public double firstDerivative(double t) { return 1 / (1 - t * t); }
29          }, -5, 5, 30, 3.0e-16);
30      }
31  
32  }