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.hipparchus.util.Binary64;
25 import org.hipparchus.util.Binary64Field;
26 import org.junit.jupiter.params.ParameterizedTest;
27 import org.junit.jupiter.params.provider.MethodSource;
28
29 import java.util.ArrayList;
30 import java.util.Collection;
31
32 /**
33 * Test of the {@link FieldLegendreRuleFactory}.
34 * This parameterized test extends the standard test for Gaussian quadrature
35 * rule, where each monomial is tested in turn.
36 * Parametrization allows to test automatically 0, 1, ... , {@link #MAX_NUM_POINTS}
37 * quadrature rules.
38 *
39 */
40 public class FieldLegendreParametricTest extends FieldGaussianQuadratureAbstractTest {
41 private static final FieldGaussIntegratorFactory<Binary64> factory = new FieldGaussIntegratorFactory<>(Binary64Field.getInstance());
42
43 /**
44 * The highest order quadrature rule to be tested.
45 */
46 public static final int MAX_NUM_POINTS = 30;
47
48 /**
49 * Returns the collection of parameters to be passed to the constructor of
50 * this class.
51 * Gauss-Legendre quadrature rules of order 1, ..., {@link #MAX_NUM_POINTS}
52 * will be constructed.
53 *
54 * @return the collection of parameters for this parameterized test.
55 */
56 public static Collection<Object[]> getParameters() {
57 final ArrayList<Object[]> parameters = new ArrayList<Object[]>();
58 for (int k = 1; k <= MAX_NUM_POINTS; k++) {
59 parameters.add(new Object[] { k, 2 * k - 1, Math.ulp(1d), 91d });
60 }
61 return parameters;
62 }
63
64 @Override
65 public double getExpectedValue(final int n) {
66 if (n % 2 == 1) {
67 return 0;
68 }
69 return 2d / (n + 1);
70 }
71
72 @ParameterizedTest
73 @MethodSource("getParameters")
74 void testAllMonomials(int numberOfPoints, int maxDegree, double eps,
75 double numUlps) {
76 super.testAllMonomials(factory.legendre(numberOfPoints), maxDegree, eps,
77 numUlps);
78 }
79 }