test/java/math/BigInteger/SymmetricRangeTests.java

rev 11823 : 8078672: Print and allow setting by Java property seeds used to initialize Random instances in java.lang numerics tests
Summary: Add ability to initial the random number generator from the system property "seed" and print to STDOUT the seed value actually used.
Reviewed-by: XXX

*** 1,7 ****
  /*
!  * Copyright (c) 2013, 1025, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 22,34 ****
   */
  
  /*
   * @test
   * @ignore This test has huge memory requirements
!  * @library ..
   * @run main/timeout=180/othervm -Xmx8g SymmetricRangeTests
!  * @bug 6910473 8021204 8021203 9005933 8074460
   * @summary Test range of BigInteger values (use -Dseed=X to set PRNG seed)
   * @author Dmitry Nadezhin
   * @key randomness
   */
  import java.io.ByteArrayInputStream;
--- 22,35 ----
   */
  
  /*
   * @test
   * @ignore This test has huge memory requirements
!  * @library /lib/testlibrary/
!  * @build jdk.testlibrary.*
   * @run main/timeout=180/othervm -Xmx8g SymmetricRangeTests
!  * @bug 6910473 8021204 8021203 9005933 8074460 8078672
   * @summary Test range of BigInteger values (use -Dseed=X to set PRNG seed)
   * @author Dmitry Nadezhin
   * @key randomness
   */
  import java.io.ByteArrayInputStream;
*** 36,45 ****
--- 37,47 ----
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.util.Arrays;
  import java.math.BigInteger;
+ import java.util.Random;
  
  public class SymmetricRangeTests {
  
      private static final BigInteger MAX_VALUE = makeMaxValue();
      private static final BigInteger MIN_VALUE = MAX_VALUE.negate();
*** 113,125 ****
  
      private static void testOverflowInBitSieve() {
          System.out.println("Testing overflow in BitSieve.sieveSingle");
          int bitLength = (5 << 27) - 1;
          try {
!             RandomSeed rndSeed = new RandomSeed(false);
!             System.out.println("Random number generator seed = " + rndSeed.getSeed());
!             BigInteger actual = new BigInteger(bitLength, 0, rndSeed.getRandom());
              throw new RuntimeException("new BigInteger(bitLength, 0, null).bitLength()=" + actual.bitLength());
          } catch (ArithmeticException e) {
              // expected
          }
          try {
--- 115,126 ----
  
      private static void testOverflowInBitSieve() {
          System.out.println("Testing overflow in BitSieve.sieveSingle");
          int bitLength = (5 << 27) - 1;
          try {
!             Random random = RandomFactory.getRandom();
!             BigInteger actual = new BigInteger(bitLength, 0, random);
              throw new RuntimeException("new BigInteger(bitLength, 0, null).bitLength()=" + actual.bitLength());
          } catch (ArithmeticException e) {
              // expected
          }
          try {