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