1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @summary flat-map operations
  27  * @bug 8044047 8076458
  28  */
  29 
  30 package org.openjdk.tests.java.util.stream;
  31 
  32 import org.testng.annotations.Test;
  33 
  34 import java.util.Collection;
  35 import java.util.Collections;
  36 import java.util.concurrent.atomic.AtomicInteger;
  37 import java.util.stream.IntStream;
  38 import java.util.stream.IntStreamTestDataProvider;
  39 import java.util.stream.OpTestCase;
  40 import java.util.stream.TestData;
  41 
  42 import static java.util.stream.LambdaTestHelpers.*;
  43 
  44 @Test
  45 public class FlatMapIntOpTest extends OpTestCase {
  46 
  47     @Test
  48     public void testIntClose() {
  49         AtomicInteger before = new AtomicInteger();
  50         AtomicInteger onClose = new AtomicInteger();
  51 
  52         IntStream.of(1, 2).peek(e -> before.getAndIncrement()).
  53                 flatMap(i -> IntStream.of(i, i).onClose(onClose::getAndIncrement)).count();
  54         assertEquals(before.get(), onClose.get());
  55     }
  56 
  57     @Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class)
  58     public void testIntOps(String name, TestData.OfInt data) {
  59         Collection<Integer> result = exerciseOps(data, s -> s.flatMap(i -> Collections.singleton(i).stream().mapToInt(j -> j)));
  60         assertEquals(data.size(), result.size());
  61         assertContents(data, result);
  62 
  63         result = exerciseOps(data, s -> s.flatMap(i -> IntStream.empty()));
  64         assertEquals(0, result.size());
  65 
  66         exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e)));
  67         exerciseOps(data, s -> s.flatMap(e -> IntStream.range(0, e).limit(10)));
  68     }
  69 }