8160605: java/util/SplittableRandom/SplittableRandomTest.java failed with timeout
Reviewed-by: psandoz, darcy
This commit is contained in:
Martin Buchholz
parent
e2c37e40c6
commit
da7a66e347
@ -1,561 +0,0 @@
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/*
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* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import org.testng.Assert;
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import org.testng.annotations.Test;
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import java.util.SplittableRandom;
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import java.util.concurrent.ThreadLocalRandom;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.LongAdder;
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import java.util.function.BiConsumer;
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import static org.testng.Assert.assertEquals;
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import static org.testng.Assert.assertNotNull;
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import static org.testng.AssertJUnit.assertTrue;
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/**
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* @test
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* @run testng SplittableRandomTest
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* @run testng/othervm -Djava.util.secureRandomSeed=true SplittableRandomTest
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* @summary test methods on SplittableRandom
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* @key randomness
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*/
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@Test
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public class SplittableRandomTest {
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// Note: this test was copied from the 166 TCK SplittableRandomTest test
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// and modified to be a TestNG test
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/*
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* Testing coverage notes:
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*
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* 1. Many of the test methods are adapted from ThreadLocalRandomTest.
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*
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* 2. These tests do not check for random number generator quality.
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* But we check for minimal API compliance by requiring that
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* repeated calls to nextX methods, up to NCALLS tries, produce at
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* least two distinct results. (In some possible universe, a
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* "correct" implementation might fail, but the odds are vastly
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* less than that of encountering a hardware failure while running
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* the test.) For bounded nextX methods, we sample various
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* intervals across multiples of primes. In other tests, we repeat
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* under REPS different values.
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*/
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// max numbers of calls to detect getting stuck on one value
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static final int NCALLS = 10000;
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// max sampled int bound
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static final int MAX_INT_BOUND = (1 << 28);
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// max sampled long bound
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static final long MAX_LONG_BOUND = (1L << 42);
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// Number of replications for other checks
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static final int REPS = 20;
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/**
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* Repeated calls to nextInt produce at least two distinct results
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*/
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public void testNextInt() {
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SplittableRandom sr = new SplittableRandom();
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int f = sr.nextInt();
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int i = 0;
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while (i < NCALLS && sr.nextInt() == f)
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++i;
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assertTrue(i < NCALLS);
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}
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/**
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* Repeated calls to nextLong produce at least two distinct results
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*/
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public void testNextLong() {
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SplittableRandom sr = new SplittableRandom();
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long f = sr.nextLong();
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int i = 0;
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while (i < NCALLS && sr.nextLong() == f)
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++i;
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assertTrue(i < NCALLS);
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}
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/**
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* Repeated calls to nextDouble produce at least two distinct results
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*/
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public void testNextDouble() {
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SplittableRandom sr = new SplittableRandom();
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double f = sr.nextDouble();
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int i = 0;
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while (i < NCALLS && sr.nextDouble() == f)
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++i;
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assertTrue(i < NCALLS);
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}
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/**
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* Two SplittableRandoms created with the same seed produce the
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* same values for nextLong.
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*/
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public void testSeedConstructor() {
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for (long seed = 2; seed < MAX_LONG_BOUND; seed += 15485863) {
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SplittableRandom sr1 = new SplittableRandom(seed);
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SplittableRandom sr2 = new SplittableRandom(seed);
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for (int i = 0; i < REPS; ++i)
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assertEquals(sr1.nextLong(), sr2.nextLong());
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}
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}
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/**
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* A SplittableRandom produced by split() of a default-constructed
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* SplittableRandom generates a different sequence
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*/
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public void testSplit1() {
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SplittableRandom sr = new SplittableRandom();
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for (int reps = 0; reps < REPS; ++reps) {
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SplittableRandom sc = sr.split();
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int i = 0;
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while (i < NCALLS && sr.nextLong() == sc.nextLong())
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++i;
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assertTrue(i < NCALLS);
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}
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}
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/**
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* A SplittableRandom produced by split() of a seeded-constructed
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* SplittableRandom generates a different sequence
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*/
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public void testSplit2() {
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SplittableRandom sr = new SplittableRandom(12345);
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for (int reps = 0; reps < REPS; ++reps) {
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SplittableRandom sc = sr.split();
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int i = 0;
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while (i < NCALLS && sr.nextLong() == sc.nextLong())
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++i;
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assertTrue(i < NCALLS);
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}
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}
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/**
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* nextInt(negative) throws IllegalArgumentException
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*/
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testNextIntBoundedNeg() {
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SplittableRandom sr = new SplittableRandom();
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int f = sr.nextInt(-17);
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}
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/**
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* nextInt(least >= bound) throws IllegalArgumentException
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*/
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testNextIntBadBounds() {
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SplittableRandom sr = new SplittableRandom();
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int f = sr.nextInt(17, 2);
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}
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/**
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* nextInt(bound) returns 0 <= value < bound;
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* repeated calls produce at least two distinct results
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*/
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public void testNextIntBounded() {
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SplittableRandom sr = new SplittableRandom();
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// sample bound space across prime number increments
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for (int bound = 2; bound < MAX_INT_BOUND; bound += 524959) {
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int f = sr.nextInt(bound);
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assertTrue(0 <= f && f < bound);
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int i = 0;
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int j;
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while (i < NCALLS &&
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(j = sr.nextInt(bound)) == f) {
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assertTrue(0 <= j && j < bound);
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++i;
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}
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assertTrue(i < NCALLS);
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}
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}
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/**
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* nextInt(least, bound) returns least <= value < bound;
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* repeated calls produce at least two distinct results
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*/
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public void testNextIntBounded2() {
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SplittableRandom sr = new SplittableRandom();
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for (int least = -15485863; least < MAX_INT_BOUND; least += 524959) {
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for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 49979687) {
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int f = sr.nextInt(least, bound);
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assertTrue(least <= f && f < bound);
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int i = 0;
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int j;
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while (i < NCALLS &&
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(j = sr.nextInt(least, bound)) == f) {
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assertTrue(least <= j && j < bound);
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++i;
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}
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assertTrue(i < NCALLS);
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}
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}
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}
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/**
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* nextLong(negative) throws IllegalArgumentException
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*/
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testNextLongBoundedNeg() {
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SplittableRandom sr = new SplittableRandom();
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long f = sr.nextLong(-17);
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}
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/**
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* nextLong(least >= bound) throws IllegalArgumentException
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*/
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@Test(expectedExceptions = IllegalArgumentException.class)
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public void testNextLongBadBounds() {
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SplittableRandom sr = new SplittableRandom();
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long f = sr.nextLong(17, 2);
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}
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/**
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* nextLong(bound) returns 0 <= value < bound;
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* repeated calls produce at least two distinct results
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*/
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public void testNextLongBounded() {
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SplittableRandom sr = new SplittableRandom();
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for (long bound = 2; bound < MAX_LONG_BOUND; bound += 15485863) {
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long f = sr.nextLong(bound);
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assertTrue(0 <= f && f < bound);
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int i = 0;
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long j;
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while (i < NCALLS &&
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(j = sr.nextLong(bound)) == f) {
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assertTrue(0 <= j && j < bound);
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++i;
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}
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assertTrue(i < NCALLS);
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}
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}
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/**
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* nextLong(least, bound) returns least <= value < bound;
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* repeated calls produce at least two distinct results
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*/
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public void testNextLongBounded2() {
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SplittableRandom sr = new SplittableRandom();
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for (long least = -86028121; least < MAX_LONG_BOUND; least += 982451653L) {
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for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) {
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long f = sr.nextLong(least, bound);
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assertTrue(least <= f && f < bound);
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int i = 0;
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long j;
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while (i < NCALLS &&
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(j = sr.nextLong(least, bound)) == f) {
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assertTrue(least <= j && j < bound);
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++i;
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}
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assertTrue(i < NCALLS);
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}
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}
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}
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/**
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* nextDouble(bound) throws IllegalArgumentException
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*/
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public void testNextDoubleBadBound() {
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SplittableRandom sr = new SplittableRandom();
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executeAndCatchIAE(() -> sr.nextDouble(0.0));
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executeAndCatchIAE(() -> sr.nextDouble(-0.0));
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executeAndCatchIAE(() -> sr.nextDouble(+0.0));
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executeAndCatchIAE(() -> sr.nextDouble(-1.0));
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executeAndCatchIAE(() -> sr.nextDouble(Double.NaN));
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executeAndCatchIAE(() -> sr.nextDouble(Double.NEGATIVE_INFINITY));
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// Returns Double.MAX_VALUE
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// executeAndCatchIAE(() -> r.nextDouble(Double.POSITIVE_INFINITY));
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}
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/**
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* nextDouble(origin, bound) throws IllegalArgumentException
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*/
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public void testNextDoubleBadOriginBound() {
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testDoubleBadOriginBound(new SplittableRandom()::nextDouble);
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}
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// An arbitrary finite double value
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static final double FINITE = Math.PI;
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void testDoubleBadOriginBound(BiConsumer<Double, Double> bi) {
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executeAndCatchIAE(() -> bi.accept(17.0, 2.0));
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executeAndCatchIAE(() -> bi.accept(0.0, 0.0));
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executeAndCatchIAE(() -> bi.accept(Double.NaN, FINITE));
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executeAndCatchIAE(() -> bi.accept(FINITE, Double.NaN));
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executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
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// Returns NaN
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// executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, FINITE));
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// executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY));
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executeAndCatchIAE(() -> bi.accept(FINITE, Double.NEGATIVE_INFINITY));
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// Returns Double.MAX_VALUE
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// executeAndCatchIAE(() -> bi.accept(FINITE, Double.POSITIVE_INFINITY));
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executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
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executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, FINITE));
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executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
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}
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/**
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* nextDouble(least, bound) returns least <= value < bound;
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* repeated calls produce at least two distinct results
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*/
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public void testNextDoubleBounded2() {
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SplittableRandom sr = new SplittableRandom();
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for (double least = 0.0001; least < 1.0e20; least *= 8) {
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for (double bound = least * 1.001; bound < 1.0e20; bound *= 16) {
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double f = sr.nextDouble(least, bound);
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assertTrue(least <= f && f < bound);
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int i = 0;
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double j;
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while (i < NCALLS &&
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(j = sr.nextDouble(least, bound)) == f) {
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assertTrue(least <= j && j < bound);
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++i;
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}
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assertTrue(i < NCALLS);
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}
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}
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}
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/**
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* Invoking sized ints, long, doubles, with negative sizes throws
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* IllegalArgumentException
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*/
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public void testBadStreamSize() {
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SplittableRandom r = new SplittableRandom();
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executeAndCatchIAE(() -> r.ints(-1L));
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executeAndCatchIAE(() -> r.ints(-1L, 2, 3));
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executeAndCatchIAE(() -> r.longs(-1L));
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executeAndCatchIAE(() -> r.longs(-1L, -1L, 1L));
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executeAndCatchIAE(() -> r.doubles(-1L));
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executeAndCatchIAE(() -> r.doubles(-1L, .5, .6));
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}
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/**
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* Invoking bounded ints, long, doubles, with illegal bounds throws
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* IllegalArgumentException
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*/
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public void testBadStreamBounds() {
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SplittableRandom r = new SplittableRandom();
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executeAndCatchIAE(() -> r.ints(2, 1));
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executeAndCatchIAE(() -> r.ints(10, 42, 42));
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executeAndCatchIAE(() -> r.longs(-1L, -1L));
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executeAndCatchIAE(() -> r.longs(10, 1L, -2L));
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testDoubleBadOriginBound((o, b) -> r.doubles(10, o, b));
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}
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private void executeAndCatchIAE(Runnable r) {
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executeAndCatch(IllegalArgumentException.class, r);
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}
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private void executeAndCatch(Class<? extends Exception> expected, Runnable r) {
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Exception caught = null;
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try {
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r.run();
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}
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catch (Exception e) {
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caught = e;
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}
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assertNotNull(caught,
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String.format("No Exception was thrown, expected an Exception of %s to be thrown",
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expected.getName()));
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Assert.assertTrue(expected.isInstance(caught),
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String.format("Exception thrown %s not an instance of %s",
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caught.getClass().getName(), expected.getName()));
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}
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/**
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* A parallel sized stream of ints generates the given number of values
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*/
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public void testIntsCount() {
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LongAdder counter = new LongAdder();
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SplittableRandom r = new SplittableRandom();
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long size = 0;
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for (int reps = 0; reps < REPS; ++reps) {
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counter.reset();
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r.ints(size).parallel().forEach(x -> {counter.increment();});
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assertEquals(counter.sum(), size);
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size += 524959;
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}
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}
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/**
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* A parallel sized stream of longs generates the given number of values
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*/
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public void testLongsCount() {
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LongAdder counter = new LongAdder();
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SplittableRandom r = new SplittableRandom();
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long size = 0;
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for (int reps = 0; reps < REPS; ++reps) {
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counter.reset();
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r.longs(size).parallel().forEach(x -> {counter.increment();});
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assertEquals(counter.sum(), size);
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size += 524959;
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}
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}
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/**
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* A parallel sized stream of doubles generates the given number of values
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*/
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public void testDoublesCount() {
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LongAdder counter = new LongAdder();
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SplittableRandom r = new SplittableRandom();
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long size = 0;
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for (int reps = 0; reps < REPS; ++reps) {
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counter.reset();
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r.doubles(size).parallel().forEach(x -> {counter.increment();});
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assertEquals(counter.sum(), size);
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size += 524959;
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}
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}
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/**
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* Each of a parallel sized stream of bounded ints is within bounds
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*/
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public void testBoundedInts() {
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AtomicInteger fails = new AtomicInteger(0);
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SplittableRandom r = new SplittableRandom();
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long size = 12345L;
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for (int least = -15485867; least < MAX_INT_BOUND; least += 524959) {
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for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 67867967) {
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final int lo = least, hi = bound;
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r.ints(size, lo, hi).parallel().
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forEach(x -> {if (x < lo || x >= hi)
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fails.getAndIncrement(); });
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}
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}
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assertEquals(fails.get(), 0);
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}
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/**
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* Each of a parallel sized stream of bounded longs is within bounds
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*/
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public void testBoundedLongs() {
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AtomicInteger fails = new AtomicInteger(0);
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SplittableRandom r = new SplittableRandom();
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long size = 123L;
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for (long least = -86028121; least < MAX_LONG_BOUND; least += 1982451653L) {
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for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) {
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final long lo = least, hi = bound;
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r.longs(size, lo, hi).parallel().
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forEach(x -> {if (x < lo || x >= hi)
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fails.getAndIncrement(); });
|
||||
}
|
||||
}
|
||||
assertEquals(fails.get(), 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each of a parallel sized stream of bounded doubles is within bounds
|
||||
*/
|
||||
public void testBoundedDoubles() {
|
||||
AtomicInteger fails = new AtomicInteger(0);
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 456;
|
||||
for (double least = 0.00011; least < 1.0e20; least *= 9) {
|
||||
for (double bound = least * 1.0011; bound < 1.0e20; bound *= 17) {
|
||||
final double lo = least, hi = bound;
|
||||
r.doubles(size, lo, hi).parallel().
|
||||
forEach(x -> {if (x < lo || x >= hi)
|
||||
fails.getAndIncrement(); });
|
||||
}
|
||||
}
|
||||
assertEquals(fails.get(), 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of ints generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedIntsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.ints().limit(size).parallel().forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of longs generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedLongsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.longs().limit(size).parallel().forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of doubles generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedDoublesCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.doubles().limit(size).parallel().forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of ints generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedIntsCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.ints().limit(size).forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of longs generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedLongsCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.longs().limit(size).forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of doubles generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedDoublesCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
SplittableRandom r = new SplittableRandom();
|
||||
long size = 100;
|
||||
r.doubles().limit(size).forEach(x -> {counter.increment();});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,561 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2012, 2013, 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.
|
||||
*
|
||||
* This code is distributed in the hope that it will be useful, but WITHOUT
|
||||
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* version 2 for more details (a copy is included in the LICENSE file that
|
||||
* accompanied this code).
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License version
|
||||
* 2 along with this work; if not, write to the Free Software Foundation,
|
||||
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*
|
||||
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||||
* or visit www.oracle.com if you need additional information or have any
|
||||
* questions.
|
||||
*/
|
||||
|
||||
import org.testng.Assert;
|
||||
import org.testng.annotations.Test;
|
||||
|
||||
import java.util.concurrent.ThreadLocalRandom;
|
||||
import java.util.concurrent.atomic.AtomicInteger;
|
||||
import java.util.concurrent.atomic.LongAdder;
|
||||
import java.util.function.BiConsumer;
|
||||
|
||||
import static org.testng.Assert.*;
|
||||
|
||||
/**
|
||||
* @test
|
||||
* @bug 8024253
|
||||
* @run testng ThreadLocalRandomTest
|
||||
* @run testng/othervm -Djava.util.secureRandomSeed=true ThreadLocalRandomTest
|
||||
* @summary test methods on ThreadLocalRandom
|
||||
*/
|
||||
@Test
|
||||
public class ThreadLocalRandomTest {
|
||||
|
||||
// Note: this test was copied from the 166 TCK ThreadLocalRandomTest test
|
||||
// and modified to be a TestNG test
|
||||
|
||||
/*
|
||||
* Testing coverage notes:
|
||||
*
|
||||
* We don't test randomness properties, but only that repeated
|
||||
* calls, up to NCALLS tries, produce at least one different
|
||||
* result. For bounded versions, we sample various intervals
|
||||
* across multiples of primes.
|
||||
*/
|
||||
|
||||
// max numbers of calls to detect getting stuck on one value
|
||||
static final int NCALLS = 10000;
|
||||
|
||||
// max sampled int bound
|
||||
static final int MAX_INT_BOUND = (1 << 28);
|
||||
|
||||
// max sampled long bound
|
||||
static final long MAX_LONG_BOUND = (1L << 42);
|
||||
|
||||
// Number of replications for other checks
|
||||
static final int REPS = 20;
|
||||
|
||||
/**
|
||||
* setSeed throws UnsupportedOperationException
|
||||
*/
|
||||
@Test(expectedExceptions = UnsupportedOperationException.class)
|
||||
public void testSetSeed() {
|
||||
ThreadLocalRandom.current().setSeed(17);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextInt produce at least two distinct results
|
||||
*/
|
||||
public void testNextInt() {
|
||||
int f = ThreadLocalRandom.current().nextInt();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextInt() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextLong produce at least two distinct results
|
||||
*/
|
||||
public void testNextLong() {
|
||||
long f = ThreadLocalRandom.current().nextLong();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextLong() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextBoolean produce at least two distinct results
|
||||
*/
|
||||
public void testNextBoolean() {
|
||||
boolean f = ThreadLocalRandom.current().nextBoolean();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextBoolean() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextFloat produce at least two distinct results
|
||||
*/
|
||||
public void testNextFloat() {
|
||||
float f = ThreadLocalRandom.current().nextFloat();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextFloat() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextDouble produce at least two distinct results
|
||||
*/
|
||||
public void testNextDouble() {
|
||||
double f = ThreadLocalRandom.current().nextDouble();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextDouble() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* Repeated calls to nextGaussian produce at least two distinct results
|
||||
*/
|
||||
public void testNextGaussian() {
|
||||
double f = ThreadLocalRandom.current().nextGaussian();
|
||||
int i = 0;
|
||||
while (i < NCALLS && ThreadLocalRandom.current().nextGaussian() == f)
|
||||
++i;
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
|
||||
/**
|
||||
* nextInt(negative) throws IllegalArgumentException
|
||||
*/
|
||||
@Test(expectedExceptions = IllegalArgumentException.class)
|
||||
public void testNextIntBoundedNeg() {
|
||||
int f = ThreadLocalRandom.current().nextInt(-17);
|
||||
}
|
||||
|
||||
/**
|
||||
* nextInt(least >= bound) throws IllegalArgumentException
|
||||
*/
|
||||
@Test(expectedExceptions = IllegalArgumentException.class)
|
||||
public void testNextIntBadBounds() {
|
||||
int f = ThreadLocalRandom.current().nextInt(17, 2);
|
||||
}
|
||||
|
||||
/**
|
||||
* nextInt(bound) returns 0 <= value < bound; repeated calls produce at
|
||||
* least two distinct results
|
||||
*/
|
||||
public void testNextIntBounded() {
|
||||
// sample bound space across prime number increments
|
||||
for (int bound = 2; bound < MAX_INT_BOUND; bound += 524959) {
|
||||
int f = ThreadLocalRandom.current().nextInt(bound);
|
||||
assertTrue(0 <= f && f < bound);
|
||||
int i = 0;
|
||||
int j;
|
||||
while (i < NCALLS &&
|
||||
(j = ThreadLocalRandom.current().nextInt(bound)) == f) {
|
||||
assertTrue(0 <= j && j < bound);
|
||||
++i;
|
||||
}
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* nextInt(least, bound) returns least <= value < bound; repeated calls
|
||||
* produce at least two distinct results
|
||||
*/
|
||||
public void testNextIntBounded2() {
|
||||
for (int least = -15485863; least < MAX_INT_BOUND; least += 524959) {
|
||||
for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 49979687) {
|
||||
int f = ThreadLocalRandom.current().nextInt(least, bound);
|
||||
assertTrue(least <= f && f < bound);
|
||||
int i = 0;
|
||||
int j;
|
||||
while (i < NCALLS &&
|
||||
(j = ThreadLocalRandom.current().nextInt(least, bound)) == f) {
|
||||
assertTrue(least <= j && j < bound);
|
||||
++i;
|
||||
}
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* nextLong(negative) throws IllegalArgumentException
|
||||
*/
|
||||
@Test(expectedExceptions = IllegalArgumentException.class)
|
||||
public void testNextLongBoundedNeg() {
|
||||
long f = ThreadLocalRandom.current().nextLong(-17);
|
||||
}
|
||||
|
||||
/**
|
||||
* nextLong(least >= bound) throws IllegalArgumentException
|
||||
*/
|
||||
@Test(expectedExceptions = IllegalArgumentException.class)
|
||||
public void testNextLongBadBounds() {
|
||||
long f = ThreadLocalRandom.current().nextLong(17, 2);
|
||||
}
|
||||
|
||||
/**
|
||||
* nextLong(bound) returns 0 <= value < bound; repeated calls produce at
|
||||
* least two distinct results
|
||||
*/
|
||||
public void testNextLongBounded() {
|
||||
for (long bound = 2; bound < MAX_LONG_BOUND; bound += 15485863) {
|
||||
long f = ThreadLocalRandom.current().nextLong(bound);
|
||||
assertTrue(0 <= f && f < bound);
|
||||
int i = 0;
|
||||
long j;
|
||||
while (i < NCALLS &&
|
||||
(j = ThreadLocalRandom.current().nextLong(bound)) == f) {
|
||||
assertTrue(0 <= j && j < bound);
|
||||
++i;
|
||||
}
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* nextLong(least, bound) returns least <= value < bound; repeated calls
|
||||
* produce at least two distinct results
|
||||
*/
|
||||
public void testNextLongBounded2() {
|
||||
for (long least = -86028121; least < MAX_LONG_BOUND; least += 982451653L) {
|
||||
for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) {
|
||||
long f = ThreadLocalRandom.current().nextLong(least, bound);
|
||||
assertTrue(least <= f && f < bound);
|
||||
int i = 0;
|
||||
long j;
|
||||
while (i < NCALLS &&
|
||||
(j = ThreadLocalRandom.current().nextLong(least, bound)) == f) {
|
||||
assertTrue(least <= j && j < bound);
|
||||
++i;
|
||||
}
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* nextDouble(bound) throws IllegalArgumentException
|
||||
*/
|
||||
public void testNextDoubleBadBound() {
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
executeAndCatchIAE(() -> r.nextDouble(0.0));
|
||||
executeAndCatchIAE(() -> r.nextDouble(-0.0));
|
||||
executeAndCatchIAE(() -> r.nextDouble(+0.0));
|
||||
executeAndCatchIAE(() -> r.nextDouble(-1.0));
|
||||
executeAndCatchIAE(() -> r.nextDouble(Double.NaN));
|
||||
executeAndCatchIAE(() -> r.nextDouble(Double.NEGATIVE_INFINITY));
|
||||
|
||||
// Returns Double.MAX_VALUE
|
||||
// executeAndCatchIAE(() -> r.nextDouble(Double.POSITIVE_INFINITY));
|
||||
}
|
||||
|
||||
/**
|
||||
* nextDouble(origin, bound) throws IllegalArgumentException
|
||||
*/
|
||||
public void testNextDoubleBadOriginBound() {
|
||||
testDoubleBadOriginBound(ThreadLocalRandom.current()::nextDouble);
|
||||
}
|
||||
|
||||
// An arbitrary finite double value
|
||||
static final double FINITE = Math.PI;
|
||||
|
||||
void testDoubleBadOriginBound(BiConsumer<Double, Double> bi) {
|
||||
executeAndCatchIAE(() -> bi.accept(17.0, 2.0));
|
||||
executeAndCatchIAE(() -> bi.accept(0.0, 0.0));
|
||||
executeAndCatchIAE(() -> bi.accept(Double.NaN, FINITE));
|
||||
executeAndCatchIAE(() -> bi.accept(FINITE, Double.NaN));
|
||||
executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY));
|
||||
|
||||
// Returns NaN
|
||||
// executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, FINITE));
|
||||
// executeAndCatchIAE(() -> bi.accept(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY));
|
||||
|
||||
executeAndCatchIAE(() -> bi.accept(FINITE, Double.NEGATIVE_INFINITY));
|
||||
|
||||
// Returns Double.MAX_VALUE
|
||||
// executeAndCatchIAE(() -> bi.accept(FINITE, Double.POSITIVE_INFINITY));
|
||||
|
||||
executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY));
|
||||
executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, FINITE));
|
||||
executeAndCatchIAE(() -> bi.accept(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY));
|
||||
}
|
||||
|
||||
/**
|
||||
* nextDouble(least, bound) returns least <= value < bound; repeated calls
|
||||
* produce at least two distinct results
|
||||
*/
|
||||
public void testNextDoubleBounded2() {
|
||||
for (double least = 0.0001; least < 1.0e20; least *= 8) {
|
||||
for (double bound = least * 1.001; bound < 1.0e20; bound *= 16) {
|
||||
double f = ThreadLocalRandom.current().nextDouble(least, bound);
|
||||
assertTrue(least <= f && f < bound);
|
||||
int i = 0;
|
||||
double j;
|
||||
while (i < NCALLS &&
|
||||
(j = ThreadLocalRandom.current().nextDouble(least, bound)) == f) {
|
||||
assertTrue(least <= j && j < bound);
|
||||
++i;
|
||||
}
|
||||
assertTrue(i < NCALLS);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoking sized ints, long, doubles, with negative sizes throws
|
||||
* IllegalArgumentException
|
||||
*/
|
||||
public void testBadStreamSize() {
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
executeAndCatchIAE(() -> r.ints(-1L));
|
||||
executeAndCatchIAE(() -> r.ints(-1L, 2, 3));
|
||||
executeAndCatchIAE(() -> r.longs(-1L));
|
||||
executeAndCatchIAE(() -> r.longs(-1L, -1L, 1L));
|
||||
executeAndCatchIAE(() -> r.doubles(-1L));
|
||||
executeAndCatchIAE(() -> r.doubles(-1L, .5, .6));
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoking bounded ints, long, doubles, with illegal bounds throws
|
||||
* IllegalArgumentException
|
||||
*/
|
||||
public void testBadStreamBounds() {
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
executeAndCatchIAE(() -> r.ints(2, 1));
|
||||
executeAndCatchIAE(() -> r.ints(10, 42, 42));
|
||||
executeAndCatchIAE(() -> r.longs(-1L, -1L));
|
||||
executeAndCatchIAE(() -> r.longs(10, 1L, -2L));
|
||||
|
||||
testDoubleBadOriginBound((o, b) -> r.doubles(10, o, b));
|
||||
}
|
||||
|
||||
private void executeAndCatchIAE(Runnable r) {
|
||||
executeAndCatch(IllegalArgumentException.class, r);
|
||||
}
|
||||
|
||||
private void executeAndCatch(Class<? extends Exception> expected, Runnable r) {
|
||||
Exception caught = null;
|
||||
try {
|
||||
r.run();
|
||||
}
|
||||
catch (Exception e) {
|
||||
caught = e;
|
||||
}
|
||||
|
||||
assertNotNull(caught,
|
||||
String.format("No Exception was thrown, expected an Exception of %s to be thrown",
|
||||
expected.getName()));
|
||||
Assert.assertTrue(expected.isInstance(caught),
|
||||
String.format("Exception thrown %s not an instance of %s",
|
||||
caught.getClass().getName(), expected.getName()));
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel sized stream of ints generates the given number of values
|
||||
*/
|
||||
public void testIntsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 0;
|
||||
for (int reps = 0; reps < REPS; ++reps) {
|
||||
counter.reset();
|
||||
r.ints(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
size += 524959;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel sized stream of longs generates the given number of values
|
||||
*/
|
||||
public void testLongsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 0;
|
||||
for (int reps = 0; reps < REPS; ++reps) {
|
||||
counter.reset();
|
||||
r.longs(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
size += 524959;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel sized stream of doubles generates the given number of values
|
||||
*/
|
||||
public void testDoublesCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 0;
|
||||
for (int reps = 0; reps < REPS; ++reps) {
|
||||
counter.reset();
|
||||
r.doubles(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
size += 524959;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Each of a parallel sized stream of bounded ints is within bounds
|
||||
*/
|
||||
public void testBoundedInts() {
|
||||
AtomicInteger fails = new AtomicInteger(0);
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 12345L;
|
||||
for (int least = -15485867; least < MAX_INT_BOUND; least += 524959) {
|
||||
for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 67867967) {
|
||||
final int lo = least, hi = bound;
|
||||
r.ints(size, lo, hi).parallel().
|
||||
forEach(x -> {
|
||||
if (x < lo || x >= hi)
|
||||
fails.getAndIncrement();
|
||||
});
|
||||
}
|
||||
}
|
||||
assertEquals(fails.get(), 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each of a parallel sized stream of bounded longs is within bounds
|
||||
*/
|
||||
public void testBoundedLongs() {
|
||||
AtomicInteger fails = new AtomicInteger(0);
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 123L;
|
||||
for (long least = -86028121; least < MAX_LONG_BOUND; least += 1982451653L) {
|
||||
for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) {
|
||||
final long lo = least, hi = bound;
|
||||
r.longs(size, lo, hi).parallel().
|
||||
forEach(x -> {
|
||||
if (x < lo || x >= hi)
|
||||
fails.getAndIncrement();
|
||||
});
|
||||
}
|
||||
}
|
||||
assertEquals(fails.get(), 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* Each of a parallel sized stream of bounded doubles is within bounds
|
||||
*/
|
||||
public void testBoundedDoubles() {
|
||||
AtomicInteger fails = new AtomicInteger(0);
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 456;
|
||||
for (double least = 0.00011; least < 1.0e20; least *= 9) {
|
||||
for (double bound = least * 1.0011; bound < 1.0e20; bound *= 17) {
|
||||
final double lo = least, hi = bound;
|
||||
r.doubles(size, lo, hi).parallel().
|
||||
forEach(x -> {
|
||||
if (x < lo || x >= hi)
|
||||
fails.getAndIncrement();
|
||||
});
|
||||
}
|
||||
}
|
||||
assertEquals(fails.get(), 0);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of ints generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedIntsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.ints().limit(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of longs generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedLongsCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.longs().limit(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A parallel unsized stream of doubles generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedDoublesCount() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.doubles().limit(size).parallel().forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of ints generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedIntsCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.ints().limit(size).forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of longs generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedLongsCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.longs().limit(size).forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
/**
|
||||
* A sequential unsized stream of doubles generates at least 100 values
|
||||
*/
|
||||
public void testUnsizedDoublesCountSeq() {
|
||||
LongAdder counter = new LongAdder();
|
||||
ThreadLocalRandom r = ThreadLocalRandom.current();
|
||||
long size = 100;
|
||||
r.doubles().limit(size).forEach(x -> {
|
||||
counter.increment();
|
||||
});
|
||||
assertEquals(counter.sum(), size);
|
||||
}
|
||||
|
||||
}
|
||||
@ -40,6 +40,7 @@
|
||||
* @build *
|
||||
* @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
|
||||
* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
|
||||
* @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -Djava.util.secureRandomSeed=true JSR166TestCase
|
||||
*/
|
||||
|
||||
import static java.util.concurrent.TimeUnit.MILLISECONDS;
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user