Java Random Long getLongSpecialCases()

Description

Testing helper method.

License

Apache License

Return

an array of long numbers containing corner cases:

• values near the beginning of long range,
• values near the end of long range,
• values near the beginning of int range,
• values near the end of int range,
• values near zero
• and some randomly distributed values.

Declaration

private static long[] getLongSpecialCases() 

Method Source Code

//package com.java2s;
/*/*from   w w w. ja v  a  2s  .co m*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * Testing helper method.
     * @return an array of long numbers containing corner cases:<ul>
     * <li>values near the beginning of long range,</li>
     * <li>values near the end of long range,</li>
     * <li>values near the beginning of int range,</li>
     * <li>values near the end of int range,</li>
     * <li>values near zero</li>
     * <li>and some randomly distributed values.</li>
     * </ul>
     */
    private static long[] getLongSpecialCases() {
        long longs[] = new long[100];
        int i = 0;
        longs[i++] = Long.MAX_VALUE;
        longs[i++] = Long.MAX_VALUE - 1L;
        longs[i++] = (long) Integer.MAX_VALUE + 1L;
        longs[i++] = Integer.MAX_VALUE;
        longs[i++] = Integer.MAX_VALUE - 1;
        longs[i++] = 100L;
        longs[i++] = 101L;
        longs[i++] = 102L;
        longs[i++] = 300L;
        longs[i++] = 567L;
        for (int j = 0; j < 20; j++) {
            longs[i++] = j;
        }
        for (int j = i - 1; j >= 0; j--) {
            longs[i++] = longs[j] > 0L ? -longs[j] : Long.MIN_VALUE;
        }
        java.util.Random r = new java.util.Random(System.nanoTime());
        for (; i < longs.length;) {
            longs[i++] = r.nextLong();
        }
        return longs;
    }
}

Related

1. getLong()
2. getLong()
3. getLongBetween(long n, long m)
4. getLongInRange(long minValue, long maxValue)
5. getLongSpecial()
6. getRandomLong()
7. nextLong()
8. nextLong()
9. nextLong()