8012645: Stream methods on BitSet, Random, ThreadLocalRandom, ZipFile
Reviewed-by: mduigou, henryjen, alanb, martin, psandoz
Contributed-by: akhil.arora@oracle.com, brian.goetz@oracle.com
diff --git a/test/java/util/Random/RandomStreamTest.java b/test/java/util/Random/RandomStreamTest.java
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+/*
+ * 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.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+import java.security.SecureRandom;
+import java.util.Arrays;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Random;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
+import java.util.stream.IntStream;
+import java.util.stream.LongStream;
+import java.util.stream.DoubleStream;
+import java.util.stream.Stream;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+/**
+ * @test
+ * @run testng RandomStreamTest
+ * @summary test stream methods on Random
+ * @author Brian Goetz
+ */
+public class RandomStreamTest {
+
+ private static final int SIZE = 1000;
+
+ @DataProvider(name = "suppliers")
+ public Object[][] randomSuppliers() {
+ return new Object[][] {
+ {new Random(), SIZE},
+ {new SecureRandom(), SIZE}
+ };
+ }
+
+ @Test(dataProvider = "suppliers")
+ public void testRandomIntStream(final Random random, final int count) {
+ final List<Integer> destination = new ArrayList<>(count);
+ random.ints().limit(count).forEach(destination::add);
+ assertEquals(destination.size(), count);
+ }
+
+ @Test(dataProvider = "suppliers")
+ public void testRandomLongStream(final Random random, final int count) {
+ final List<Long> destination = new ArrayList<>(count);
+ random.longs().limit(count).forEach(destination::add);
+ assertEquals(destination.size(), count);
+ }
+
+ @Test(dataProvider = "suppliers")
+ public void testRandomDoubleStream(final Random random, final int count) {
+ final List<Double> destination = new ArrayList<>(count);
+ random.doubles().limit(count).forEach(destination::add);
+ random.doubles().limit(count).forEach(d -> assertTrue(d >= 0.0 && d < 1.0));
+ assertEquals(destination.size(), count);
+ }
+
+ @Test(dataProvider = "suppliers")
+ public void testRandomGaussianStream(final Random random, final int count) {
+ final List<Double> destination = new ArrayList<>(count);
+ random.gaussians().limit(count).forEach(destination::add);
+ assertEquals(destination.size(), count);
+ }
+
+ @Test
+ public void testIntStream() {
+ final long seed = System.currentTimeMillis();
+ final Random r1 = new Random(seed);
+ final int[] a = new int[SIZE];
+ for (int i=0; i < SIZE; i++) {
+ a[i] = r1.nextInt();
+ }
+
+ final Random r2 = new Random(seed); // same seed
+ final int[] b = r2.ints().limit(SIZE).toArray();
+ assertEquals(a, b);
+ }
+
+ @Test
+ public void testLongStream() {
+ final long seed = System.currentTimeMillis();
+ final Random r1 = new Random(seed);
+ final long[] a = new long[SIZE];
+ for (int i=0; i < SIZE; i++) {
+ a[i] = r1.nextLong();
+ }
+
+ final Random r2 = new Random(seed); // same seed
+ final long[] b = r2.longs().limit(SIZE).toArray();
+ assertEquals(a, b);
+ }
+
+ @Test
+ public void testDoubleStream() {
+ final long seed = System.currentTimeMillis();
+ final Random r1 = new Random(seed);
+ final double[] a = new double[SIZE];
+ for (int i=0; i < SIZE; i++) {
+ a[i] = r1.nextDouble();
+ }
+
+ final Random r2 = new Random(seed); // same seed
+ final double[] b = r2.doubles().limit(SIZE).toArray();
+ assertEquals(a, b);
+ }
+
+ @Test
+ public void testGaussianStream() {
+ final long seed = System.currentTimeMillis();
+ final Random r1 = new Random(seed);
+ final double[] a = new double[SIZE];
+ for (int i=0; i < SIZE; i++) {
+ a[i] = r1.nextGaussian();
+ }
+
+ final Random r2 = new Random(seed); // same seed
+ final double[] b = r2.gaussians().limit(SIZE).toArray();
+ assertEquals(a, b);
+ }
+
+ @Test
+ public void testThreadLocalIntStream() throws InterruptedException {
+ final ExecutorService e = Executors.newFixedThreadPool(10);
+ final ThreadLocalRandom tlr = ThreadLocalRandom.current();
+
+ final class RandomTask implements Runnable {
+ int[] randoms;
+
+ @Override
+ public void run() {
+ randoms = tlr.ints().limit(SIZE).toArray();
+ }
+ }
+ final RandomTask[] tasks = new RandomTask[10];
+ for (int i=0; i < tasks.length; i++) {
+ tasks[i] = new RandomTask();
+ }
+ for (int i=0; i < tasks.length; i++) {
+ e.submit(tasks[i]);
+ }
+ e.shutdown();
+ e.awaitTermination(3, TimeUnit.SECONDS);
+ for (int i=1; i < tasks.length; i++) {
+ assertFalse(Arrays.equals(tasks[0].randoms, tasks[i].randoms));
+ }
+ }
+
+ @Test
+ public void testThreadLocalLongStream() throws InterruptedException {
+ final ExecutorService e = Executors.newFixedThreadPool(10);
+ final ThreadLocalRandom tlr = ThreadLocalRandom.current();
+
+ final class RandomTask implements Runnable {
+ long[] randoms;
+
+ @Override
+ public void run() {
+ randoms = tlr.longs().limit(SIZE).toArray();
+ }
+ }
+ final RandomTask[] tasks = new RandomTask[10];
+ for (int i=0; i < tasks.length; i++) {
+ tasks[i] = new RandomTask();
+ }
+ for (int i=0; i < tasks.length; i++) {
+ e.submit(tasks[i]);
+ }
+ e.shutdown();
+ e.awaitTermination(3, TimeUnit.SECONDS);
+ for (int i=1; i < tasks.length; i++) {
+ assertFalse(Arrays.equals(tasks[0].randoms, tasks[i].randoms));
+ }
+ }
+
+ @Test
+ public void testThreadLocalDoubleStream() throws InterruptedException {
+ final ExecutorService e = Executors.newFixedThreadPool(10);
+ final ThreadLocalRandom tlr = ThreadLocalRandom.current();
+
+ final class RandomTask implements Runnable {
+ double[] randoms;
+
+ @Override
+ public void run() {
+ randoms = tlr.doubles().limit(SIZE).toArray();
+ }
+ }
+ final RandomTask[] tasks = new RandomTask[10];
+ for (int i=0; i < tasks.length; i++) {
+ tasks[i] = new RandomTask();
+ }
+ for (int i=0; i < tasks.length; i++) {
+ e.submit(tasks[i]);
+ }
+ e.shutdown();
+ e.awaitTermination(3, TimeUnit.SECONDS);
+ for (int i=1; i < tasks.length; i++) {
+ assertFalse(Arrays.equals(tasks[0].randoms, tasks[i].randoms));
+ }
+ }
+
+ @Test
+ public void testThreadLocalGaussianStream() throws InterruptedException {
+ final ExecutorService e = Executors.newFixedThreadPool(10);
+ final ThreadLocalRandom tlr = ThreadLocalRandom.current();
+
+ final class RandomTask implements Runnable {
+ double[] randoms;
+
+ @Override
+ public void run() {
+ randoms = tlr.gaussians().limit(SIZE).toArray();
+ }
+ }
+ final RandomTask[] tasks = new RandomTask[10];
+ for (int i=0; i < tasks.length; i++) {
+ tasks[i] = new RandomTask();
+ }
+ for (int i=0; i < tasks.length; i++) {
+ e.submit(tasks[i]);
+ }
+ e.shutdown();
+ e.awaitTermination(3, TimeUnit.SECONDS);
+ for (int i=1; i < tasks.length; i++) {
+ assertFalse(Arrays.equals(tasks[0].randoms, tasks[i].randoms));
+ }
+ }
+
+}