| /* |
| * 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 |
| * |
| * http://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. |
| */ |
| package org.apache.commons.numbers.gamma; |
| |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Tests for {@link LanczosApproximation}. |
| */ |
| public class LanczosApproximationTest { |
| @Test |
| public void testG() { |
| Assertions.assertEquals(607d / 128d, LanczosApproximation.g(), 0d); |
| } |
| |
| @Test |
| public void testSomeValues() { |
| // Given that few values are checked, this test would only serve |
| // as early warning of unexpected changes to the current code. |
| Assertions.assertEquals(29.020294557631818d, LanczosApproximation.value(0.1d), 0d); |
| Assertions.assertEquals(13.14778027539684d, LanczosApproximation.value(1.0d), 0d); |
| Assertions.assertEquals(7.897828855157814d, LanczosApproximation.value(2.0d), 0d); |
| } |
| } |