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.rng.simple.internal;
18
19 import org.junit.jupiter.api.Assertions;
20 import org.junit.jupiter.api.Test;
21
22 /**
23 * Tests for the {@link Long2IntArray} converter.
24 */
25 class Long2IntArrayTest {
26 @Test
27 void testFixedLengthConversion() {
28 for (int length = 0; length < 10; length++) {
29 testFixedLengthConversion(length);
30 }
31 }
32
33 private static void testFixedLengthConversion(int length) {
34 final Long seed = 567L;
35 final int[] out = new Long2IntArray(length).convert(seed);
36 Assertions.assertEquals(length, out.length);
37 // This very seed dependent but the algorithm
38 // should only produce 0 about 1 in 2^32 times.
39 for (int i = 0; i < length; i++) {
40 Assertions.assertNotEquals(0, out[i]);
41 }
42 }
43 }