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 * https://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
18 /*
19 * This is not the original file distributed by the Apache Software Foundation
20 * It has been modified by the Hipparchus project
21 */
22 package org.hipparchus.analysis.integration.gauss;
23
24 import org.junit.jupiter.params.ParameterizedTest;
25 import org.junit.jupiter.params.provider.MethodSource;
26
27 import java.util.ArrayList;
28 import java.util.Collection;
29
30 /**
31 * Test of the {@link FieldLegendreRuleFactory}.
32 * This parameterized test extends the standard test for Gaussian quadrature
33 * rule, where each monomial is tested in turn.
34 * Parametrization allows to test automatically 0, 1, ... , {@link #MAX_NUM_POINTS}
35 * quadrature rules.
36 *
37 */
38 public class LegendreHighPrecisionParametricTest extends GaussianQuadratureAbstractTest {
39 private static GaussIntegratorFactory factory = new GaussIntegratorFactory();
40
41 /**
42 * The highest order quadrature rule to be tested.
43 */
44 public static final int MAX_NUM_POINTS = 30;
45
46 /**
47 * Returns the collection of parameters to be passed to the constructor of
48 * this class.
49 * Gauss-Legendre quadrature rules of order 1, ..., {@link #MAX_NUM_POINTS}
50 * will be constructed.
51 *
52 * @return the collection of parameters for this parameterized test.
53 */
54 public static Collection<Object[]> getParameters() {
55 final ArrayList<Object[]> parameters = new ArrayList<>();
56 for (int k = 1; k <= MAX_NUM_POINTS; k++) {
57 parameters.add(new Object[] { k, 2 * k - 1, Math.ulp(1d), 13d });
58 }
59 return parameters;
60 }
61
62 @Override
63 public double getExpectedValue(final int n) {
64 if (n % 2 == 1) {
65 return 0;
66 }
67 return 2d / (n + 1);
68 }
69
70 @ParameterizedTest
71 @MethodSource("getParameters")
72 void testAllMonomials(int numberOfPoints,
73 int maxDegree,
74 double eps,
75 double numUlps) {
76 super.testAllMonomials(factory.legendreHighPrecision(numberOfPoints),
77 maxDegree, eps, numUlps);
78 }
79 }