| /* |
| * Copyright (c) 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. |
| */ |
| |
| /** |
| * @test |
| * @run testng UnmodifiableMapEntrySet |
| * @summary Unit tests for wrapping classes should delegate to default methods |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Spliterator; |
| import java.util.TreeMap; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| |
| import org.testng.annotations.Test; |
| import org.testng.annotations.DataProvider; |
| |
| import static org.testng.Assert.assertEquals; |
| |
| @Test(groups = "unit") |
| public class UnmodifiableMapEntrySet { |
| static Object[][] collections; |
| |
| static <M extends Map<Integer, Integer>> M fillMap(int size, M m) { |
| for (int i = 0; i < size; i++) { |
| m.put(i, i); |
| } |
| return m; |
| } |
| |
| @DataProvider(name="maps") |
| static Object[][] mapCases() { |
| if (collections != null) { |
| return collections; |
| } |
| |
| List<Object[]> cases = new ArrayList<>(); |
| for (int size : new int[] {1, 2, 16}) { |
| cases.add(new Object[] { |
| String.format("new HashMap(%d)", size), |
| (Supplier<Map<Integer, Integer>>) |
| () -> Collections.unmodifiableMap(fillMap(size, new HashMap<>())) }); |
| cases.add(new Object[] { |
| String.format("new TreeMap(%d)", size), |
| (Supplier<Map<Integer, Integer>>) |
| () -> Collections.unmodifiableSortedMap(fillMap(size, new TreeMap<>())) }); |
| } |
| |
| return cases.toArray(new Object[0][]); |
| } |
| |
| static class EntryConsumer implements Consumer<Map.Entry<Integer, Integer>> { |
| int updates; |
| @Override |
| public void accept(Map.Entry<Integer, Integer> me) { |
| try { |
| me.setValue(Integer.MAX_VALUE); |
| updates++; |
| } catch (UnsupportedOperationException e) { |
| } |
| } |
| |
| void assertNoUpdates() { |
| assertEquals(updates, 0, "Updates to entries"); |
| } |
| } |
| |
| void testWithEntryConsumer(Consumer<EntryConsumer> c) { |
| EntryConsumer ec = new EntryConsumer(); |
| c.accept(ec); |
| ec.assertNoUpdates(); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testForEach(String d, Supplier<Map<Integer, Integer>> ms) { |
| testWithEntryConsumer( |
| ec -> ms.get().entrySet().forEach(ec)); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testIteratorForEachRemaining(String d, Supplier<Map<Integer, Integer>> ms) { |
| testWithEntryConsumer( |
| ec -> ms.get().entrySet().iterator().forEachRemaining(ec)); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testIteratorNext(String d, Supplier<Map<Integer, Integer>> ms) { |
| testWithEntryConsumer(ec -> { |
| for (Map.Entry<Integer, Integer> me : ms.get().entrySet()) { |
| ec.accept(me); |
| } |
| }); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testSpliteratorForEachRemaining(String d, Supplier<Map<Integer, Integer>> ms) { |
| testSpliterator( |
| ms.get().entrySet()::spliterator, |
| // Higher order function returning a consumer that |
| // traverses all spliterator elements using an EntryConsumer |
| s -> ec -> s.forEachRemaining(ec)); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testSpliteratorTryAdvance(String d, Supplier<Map<Integer, Integer>> ms) { |
| testSpliterator( |
| ms.get().entrySet()::spliterator, |
| // Higher order function returning a consumer that |
| // traverses all spliterator elements using an EntryConsumer |
| s -> ec -> { while (s.tryAdvance(ec)); }); |
| } |
| |
| void testSpliterator(Supplier<Spliterator<Map.Entry<Integer, Integer>>> ss, |
| // Higher order function that given a spliterator returns a |
| // consumer for that spliterator which traverses elements |
| // using an EntryConsumer |
| Function<Spliterator<Map.Entry<Integer, Integer>>, Consumer<EntryConsumer>> sc) { |
| testWithEntryConsumer(sc.apply(ss.get())); |
| |
| Spliterator<Map.Entry<Integer, Integer>> s = ss.get(); |
| Spliterator<Map.Entry<Integer, Integer>> split = s.trySplit(); |
| if (split != null) { |
| testWithEntryConsumer(sc.apply(split)); |
| testWithEntryConsumer(sc.apply(s)); |
| } |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testStreamForEach(String d, Supplier<Map<Integer, Integer>> ms) { |
| testWithEntryConsumer(ec -> ms.get().entrySet().stream().forEach(ec)); |
| } |
| |
| @Test(dataProvider = "maps") |
| public void testParallelStreamForEach(String d, Supplier<Map<Integer, Integer>> ms) { |
| testWithEntryConsumer(ec -> ms.get().entrySet().parallelStream().forEach(ec)); |
| } |
| } |
| |