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.numbers.complex;
18
19 import org.junit.jupiter.api.Assertions;
20 import org.junit.jupiter.api.Test;
21
22 /**
23 * Tests for examples contained in the user guide.
24 */
25 class UserGuideTest {
26
27 @Test
28 void testComplex1() {
29 double x = 3;
30 double y = 4;
31 Complex c1 = Complex.ofCartesian(x, y);
32 // c1 == x + iy
33
34 double rho = 1.23;
35 double theta = Math.PI / 2;
36 Complex c2 = Complex.ofPolar(rho, theta);
37
38 // This is a compilation test. Objects must be valid.
39 Assertions.assertNotNull(c1);
40 Assertions.assertNotNull(c2);
41 }
42
43 @Test
44 void testComplex2() {
45 Complex c1 = Complex.ofCartesian(3, 4);
46 Complex c2 = Complex.ofCartesian(5, 6);
47 Complex c3 = c1.multiply(c2).sqrt();
48
49 double magnitude = c3.abs();
50 double argument = c3.arg();
51
52 boolean finite = c3.isFinite();
53
54 // This is a compilation test. Objects must be valid.
55 Assertions.assertTrue(Double.isFinite(magnitude));
56 Assertions.assertTrue(Double.isFinite(argument));
57 Assertions.assertTrue(finite);
58 }
59 }