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 java.util.stream.IntStream;
20 import org.junit.jupiter.api.Assertions;
21 import org.junit.jupiter.params.ParameterizedTest;
22 import org.junit.jupiter.params.provider.MethodSource;
23
24 /**
25 * Tests for the {@link ByteArray2LongArray} converter.
26 */
27 class ByteArray2LongArrayTest {
28 /**
29 * Gets the lengths for the byte[] seeds to convert.
30 *
31 * @return the lengths
32 */
33 static IntStream getLengths() {
34 return IntStream.rangeClosed(0, Long.BYTES * 2);
35 }
36
37 /**
38 * Gets the expected output length.
39 *
40 * @param bytes Number of bytes
41 * @return the output length
42 */
43 private static int getOutputLength(int bytes) {
44 return (int) Math.ceil((double) bytes / Long.BYTES);
45 }
46
47 @ParameterizedTest
48 @MethodSource(value = {"getLengths"})
49 void testSeedSizeIsMultipleOfIntSize(int bytes) {
50 final byte[] seed = new byte[bytes];
51
52 final long[] out = new ByteArray2LongArray().convert(seed);
53 Assertions.assertEquals(getOutputLength(bytes), out.length);
54 }
55 }