392 lines
15 KiB
Java
392 lines
15 KiB
Java
/*
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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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* @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 org.testng.Assert;
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import org.testng.Assert.ThrowingRunnable;
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import org.testng.annotations.DataProvider;
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import org.testng.annotations.Test;
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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.NavigableSet;
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import java.util.NoSuchElementException;
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import java.util.SortedSet;
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import java.util.TreeSet;
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import static org.testng.Assert.assertFalse;
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import static org.testng.Assert.assertNull;
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import static org.testng.Assert.assertSame;
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import static org.testng.Assert.assertTrue;
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public class EmptyNavigableSet {
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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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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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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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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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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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private void assertThrowsCCE(ThrowingRunnable r, String s) {
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assertThrows(ClassCastException.class, r, s);
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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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private void assertThrowsIAE(ThrowingRunnable r, String s) {
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assertThrows(IllegalArgumentException.class, r, s);
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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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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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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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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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throw new IllegalStateException("can't determine ordering for " + set);
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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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assertTrue(comparator == null || comparator == Collections.reverseOrder(), description + ": Comparator (" + comparator + ") is not null.");
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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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description + ": Comparable should be required");
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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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* 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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assertFalse(navigableSet.containsAll(treeSet), "Should not contain any elements.");
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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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assertFalse(navigableSet.iterator().hasNext(), "The iterator is not empty.");
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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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* 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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* 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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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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NavigableSet ns = navigableSet.headSet("1", false);
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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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* 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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* 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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* 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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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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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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Object obj1 = new Object();
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Object obj2 = new Object();
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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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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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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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// 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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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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assertThrowsIAE(
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() -> navigableSet.subSet(last, true, first, false),
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description
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+ ": Must throw IllegalArgumentException when fromElement is not less than toElement.");
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navigableSet.subSet(first, true, last, false);
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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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NavigableSet subSet = navigableSet.subSet(first, true, last, true);
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// same subset
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subSet.subSet(first, true, last, true);
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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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description + ": Expansion should not be allowed");
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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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@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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// same subset
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subSet.headSet(BigInteger.ONE, true);
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// slightly smaller
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NavigableSet ns = subSet.headSet(BigInteger.ONE, false);
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// slight expansion
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assertThrowsIAE(
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() -> ns.headSet(BigInteger.ONE, true),
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description + ": Expansion should not be allowed");
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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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@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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// same subset
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subSet.tailSet(BigInteger.ONE, true);
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// slightly smaller
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NavigableSet ns = subSet.tailSet(BigInteger.ONE, false);
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// slight expansion
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assertThrowsIAE(
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() -> ns.tailSet(BigInteger.ONE, true),
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description + ": Expansion should not be allowed");
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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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* 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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description + ": Must throw NullPointerException for null element");
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assertThrowsCCE(
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() -> navigableSet.tailSet(new Object()),
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description);
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NavigableSet ss = navigableSet.tailSet("1", true);
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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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* 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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assertTrue(emptyNavigableSetArray.length == 0, "Returned non-empty Array.");
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emptyNavigableSetArray = new Object[20];
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Object[] result = navigableSet.toArray(emptyNavigableSetArray);
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assertSame(emptyNavigableSetArray, result);
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assertNull(result[0]);
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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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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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}
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