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/* |
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* Copyright (c) 2011, 2017, 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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|
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/* |
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* @test |
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* @bug 4533691 7129185 |
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* @summary Unit test for Collections.emptyNavigableSet |
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* @run testng EmptyNavigableSet |
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*/ |
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import java.math.BigInteger; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Comparator; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.NavigableSet; |
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import java.util.SortedSet; |
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import java.util.TreeSet; |
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|
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import org.testng.Assert; |
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import org.testng.Assert.ThrowingRunnable; |
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import org.testng.annotations.Test; |
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import org.testng.annotations.DataProvider; |
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|
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import static org.testng.Assert.assertFalse; |
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import static org.testng.Assert.assertSame; |
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import static org.testng.Assert.assertTrue; |
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|
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public class EmptyNavigableSet { |
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|
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public static <T> void assertInstance(T actual, Class<? extends T> expected) { |
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assertInstance(actual, expected, null); |
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} |
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|
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public static <T> void assertInstance(T actual, Class<? extends T> expected, String message) { |
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assertTrue(expected.isInstance(actual), ((null != message) ? message : "") |
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+ " " + (actual == null ? "<null>" : actual.getClass().getSimpleName()) + " != " + expected.getSimpleName() + ". "); |
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} |
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|
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public static <T extends Throwable> void assertEmptyNavigableSet(Object obj) { |
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assertInstance(obj, NavigableSet.class); |
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assertTrue(((NavigableSet)obj).isEmpty() && (((NavigableSet)obj).size() == 0)); |
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} |
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|
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public static <T extends Throwable> void assertEmptyNavigableSet(Object obj, String message) { |
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assertInstance(obj, NavigableSet.class, message); |
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assertTrue(((NavigableSet)obj).isEmpty() && (((NavigableSet)obj).size() == 0), |
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((null != message) ? message : "") + " Not empty. "); |
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} |
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|
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private <T extends Throwable> void assertThrows(Class<T> throwableClass, |
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ThrowingRunnable runnable, |
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String message) { |
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try { |
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Assert.assertThrows(throwableClass, runnable); |
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} catch (AssertionError e) { |
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throw new AssertionError(String.format("%s%n%s", |
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((null != message) ? message : ""), e.getMessage()), e); |
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} |
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} |
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|
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private void assertThrowsCCE(ThrowingRunnable r, String s) { |
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assertThrows(ClassCastException.class, r, s); |
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} |
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|
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private void assertThrowsNPE(ThrowingRunnable r, String s) { |
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assertThrows(NullPointerException.class, r, s); |
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} |
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|
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private void assertThrowsIAE(ThrowingRunnable r, String s) { |
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assertThrows(IllegalArgumentException.class, r, s); |
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} |
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|
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private void assertThrowsNSEE(ThrowingRunnable r, String s) { |
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assertThrows(NoSuchElementException.class, r, s); |
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} |
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|
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public static final boolean isDescending(SortedSet<?> set) { |
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if (null == set.comparator()) { |
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// natural order |
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return false; |
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} |
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|
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if (Collections.reverseOrder() == set.comparator()) { |
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// reverse natural order. |
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return true; |
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} |
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|
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if (set.comparator().equals(Collections.reverseOrder(Collections.reverseOrder(set.comparator())))) { |
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// it's a Collections.reverseOrder(Comparator). |
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return true; |
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} |
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|
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throw new IllegalStateException("can't determine ordering for " + set); |
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} |
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|
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/** |
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* Tests that the comparator is {@code null}. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testComparatorIsNull(String description, NavigableSet<?> navigableSet) { |
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Comparator comparator = navigableSet.comparator(); |
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|
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assertTrue(comparator == null || comparator == Collections.reverseOrder(), description + ": Comparator (" + comparator + ") is not null."); |
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} |
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|
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/** |
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* Tests that contains requires Comparable |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testContainsRequiresComparable(String description, NavigableSet<?> navigableSet) { |
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assertThrowsCCE(() -> { |
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navigableSet.contains(new Object()); |
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}, |
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description + ": Compareable should be required"); |
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} |
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|
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/** |
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* Tests that the contains method returns {@code false}. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testContains(String description, NavigableSet<?> navigableSet) { |
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assertFalse(navigableSet.contains(new Integer(1)), |
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description + ": Should not contain any elements."); |
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} |
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|
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/** |
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* Tests that the containsAll method returns {@code false}. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testContainsAll(String description, NavigableSet<?> navigableSet) { |
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TreeSet treeSet = new TreeSet(); |
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treeSet.add("1"); |
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treeSet.add("2"); |
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treeSet.add("3"); |
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|
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assertFalse(navigableSet.containsAll(treeSet), "Should not contain any elements."); |
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} |
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|
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/** |
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* Tests that the iterator is empty. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testEmptyIterator(String description, NavigableSet<?> navigableSet) { |
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Iterator emptyIterator = navigableSet.iterator(); |
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|
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assertFalse((emptyIterator != null) && (emptyIterator.hasNext()), |
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"The iterator is not empty."); |
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} |
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|
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/** |
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* Tests that the set is empty. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testIsEmpty(String description, NavigableSet<?> navigableSet) { |
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assertTrue(navigableSet.isEmpty(), "The set is not empty."); |
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} |
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|
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/** |
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* Tests that the first() method throws NoSuchElementException |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testFirst(String description, NavigableSet<?> navigableSet) { |
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assertThrowsNSEE(navigableSet::first, description); |
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} |
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|
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/** |
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* Tests the headSet() method. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testHeadSet(String description, NavigableSet navigableSet) { |
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assertThrowsNPE( |
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() -> { NavigableSet ns = navigableSet.headSet(null, false); }, |
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description + ": Must throw NullPointerException for null element"); |
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|
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assertThrowsCCE( |
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() -> { NavigableSet ns = navigableSet.headSet(new Object(), true); }, |
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description + ": Must throw ClassCastException for non-Comparable element"); |
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|
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NavigableSet ns = navigableSet.headSet("1", false); |
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|
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assertEmptyNavigableSet(ns, description + ": Returned value is not empty navigable set."); |
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} |
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|
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/** |
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* Tests that the last() method throws NoSuchElementException |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testLast(String description, NavigableSet<?> navigableSet) { |
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assertThrowsNSEE(navigableSet::last, description); |
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} |
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|
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/** |
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* Tests that the size is 0. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testSizeIsZero(String description, NavigableSet<?> navigableSet) { |
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assertTrue(0 == navigableSet.size(), "The size of the set is not 0."); |
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} |
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|
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/** |
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* Tests the subSet() method. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testSubSet(String description, NavigableSet navigableSet) { |
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assertThrowsNPE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(null, BigInteger.TEN); |
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}, |
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description + ": Must throw NullPointerException for null element"); |
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|
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assertThrowsNPE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(BigInteger.ZERO, null); |
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}, |
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description + ": Must throw NullPointerException for null element"); |
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|
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assertThrowsNPE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(null, null); |
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}, |
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description + ": Must throw NullPointerException for null element"); |
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|
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Object obj1 = new Object(); |
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Object obj2 = new Object(); |
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|
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assertThrowsCCE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(obj1, BigInteger.TEN); |
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}, |
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description + ": Must throw ClassCastException for parameter which is not Comparable."); |
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|
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assertThrowsCCE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(BigInteger.ZERO, obj2); |
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}, |
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description + ": Must throw ClassCastException for parameter which is not Comparable."); |
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|
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assertThrowsCCE( |
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() -> { |
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SortedSet ss = navigableSet.subSet(obj1, obj2); |
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}, |
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description + ": Must throw ClassCastException for parameter which is not Comparable."); |
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|
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// minimal range |
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navigableSet.subSet(BigInteger.ZERO, false, BigInteger.ZERO, false); |
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navigableSet.subSet(BigInteger.ZERO, false, BigInteger.ZERO, true); |
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navigableSet.subSet(BigInteger.ZERO, true, BigInteger.ZERO, false); |
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navigableSet.subSet(BigInteger.ZERO, true, BigInteger.ZERO, true); |
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|
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Object first = isDescending(navigableSet) ? BigInteger.TEN : BigInteger.ZERO; |
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Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO; |
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|
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assertThrowsIAE( |
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() -> { |
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navigableSet.subSet(last, true, first, false); |
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}, |
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description |
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+ ": Must throw IllegalArgumentException when fromElement is not less than toElement."); |
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|
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navigableSet.subSet(first, true, last, false); |
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} |
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|
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testSubSetRanges(String description, NavigableSet navigableSet) { |
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Object first = isDescending(navigableSet) ? BigInteger.TEN : BigInteger.ZERO; |
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Object last = (BigInteger.ZERO == first) ? BigInteger.TEN : BigInteger.ZERO; |
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|
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NavigableSet subSet = navigableSet.subSet(first, true, last, true); |
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|
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// same subset |
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subSet.subSet(first, true, last, true); |
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|
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// slightly smaller |
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NavigableSet ns = subSet.subSet(first, false, last, false); |
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// slight expansion |
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assertThrowsIAE(() -> { |
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ns.subSet(first, true, last, true); |
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}, |
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description + ": Expansion should not be allowed"); |
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|
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// much smaller |
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subSet.subSet(first, false, BigInteger.ONE, false); |
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} |
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|
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testheadSetRanges(String description, NavigableSet navigableSet) { |
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NavigableSet subSet = navigableSet.headSet(BigInteger.ONE, true); |
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|
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// same subset |
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subSet.headSet(BigInteger.ONE, true); |
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|
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// slightly smaller |
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NavigableSet ns = subSet.headSet(BigInteger.ONE, false); |
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|
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// slight expansion |
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assertThrowsIAE(() -> { |
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ns.headSet(BigInteger.ONE, true); |
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}, |
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description + ": Expansion should not be allowed"); |
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|
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// much smaller |
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subSet.headSet(isDescending(subSet) ? BigInteger.TEN : BigInteger.ZERO, true); |
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} |
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|
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testTailSetRanges(String description, NavigableSet navigableSet) { |
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NavigableSet subSet = navigableSet.tailSet(BigInteger.ONE, true); |
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|
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// same subset |
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subSet.tailSet(BigInteger.ONE, true); |
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|
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// slightly smaller |
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NavigableSet ns = subSet.tailSet(BigInteger.ONE, false); |
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|
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// slight expansion |
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assertThrowsIAE(() -> { |
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ns.tailSet(BigInteger.ONE, true); |
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}, |
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description + ": Expansion should not be allowed"); |
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|
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// much smaller |
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subSet.tailSet(isDescending(subSet) ? BigInteger.ZERO : BigInteger.TEN, false); |
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} |
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|
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/** |
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* Tests the tailSet() method. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testTailSet(String description, NavigableSet navigableSet) { |
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assertThrowsNPE(() -> { |
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navigableSet.tailSet(null); |
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}, |
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description + ": Must throw NullPointerException for null element"); |
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|
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assertThrowsCCE(() -> { |
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navigableSet.tailSet(new Object()); |
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}, description); |
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|
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NavigableSet ss = navigableSet.tailSet("1", true); |
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|
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assertEmptyNavigableSet(ss, description + ": Returned value is not empty navigable set."); |
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} |
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|
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/** |
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* Tests that the array has a size of 0. |
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*/ |
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@Test(dataProvider = "NavigableSet<?>", dataProviderClass = EmptyNavigableSet.class) |
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public void testToArray(String description, NavigableSet<?> navigableSet) { |
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Object[] emptyNavigableSetArray = navigableSet.toArray(); |
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|
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assertTrue(emptyNavigableSetArray.length == 0, "Returned non-empty Array."); |
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|
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emptyNavigableSetArray = new Object[20]; |
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|
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Object[] result = navigableSet.toArray(emptyNavigableSetArray); |
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|
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assertSame(emptyNavigableSetArray, result); |
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|
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assertTrue(result[0] == null); |
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} |
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|
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@DataProvider(name = "NavigableSet<?>", parallel = true) |
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public static Iterator<Object[]> navigableSetsProvider() { |
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return makeNavigableSets().iterator(); |
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} |
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|
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public static Collection<Object[]> makeNavigableSets() { |
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return Arrays.asList( |
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new Object[]{"UnmodifiableNavigableSet(TreeSet)", Collections.unmodifiableNavigableSet(new TreeSet())}, |
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new Object[]{"UnmodifiableNavigableSet(TreeSet.descendingSet()", Collections.unmodifiableNavigableSet(new TreeSet().descendingSet())}, |
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new Object[]{"UnmodifiableNavigableSet(TreeSet.descendingSet().descendingSet()", Collections.unmodifiableNavigableSet(new TreeSet().descendingSet().descendingSet())}, |
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new Object[]{"emptyNavigableSet()", Collections.emptyNavigableSet()}, |
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new Object[]{"emptyNavigableSet().descendingSet()", Collections.emptyNavigableSet().descendingSet()}, |
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new Object[]{"emptyNavigableSet().descendingSet().descendingSet()", Collections.emptyNavigableSet().descendingSet().descendingSet()} |
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); |
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} |
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} |
