author | smarks |
Thu, 21 Jun 2018 08:45:57 -0700 | |
changeset 50698 | c1f7ece09b84 |
parent 49283 | a14ede52a278 |
child 50809 | 6ff774d73176 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 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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import java.io.ByteArrayInputStream; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.ObjectInputStream; |
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import java.io.ObjectOutputStream; |
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import java.io.Serializable; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.testng.annotations.DataProvider; |
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import org.testng.annotations.Test; |
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import static java.util.Arrays.asList; |
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import static org.testng.Assert.assertEquals; |
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import static org.testng.Assert.assertFalse; |
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import static org.testng.Assert.assertNotEquals; |
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import static org.testng.Assert.assertNotSame; |
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import static org.testng.Assert.assertSame; |
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import static org.testng.Assert.assertTrue; |
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import static org.testng.Assert.fail; |
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/* |
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* @test |
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* @bug 8048330 8203184 |
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* @summary Test convenience static factory methods on List. |
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* @run testng ListFactories |
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*/ |
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public class ListFactories { |
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static final int NUM_STRINGS = 20; // should be larger than the largest fixed-arg overload |
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static final String[] stringArray; |
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static { |
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String[] sa = new String[NUM_STRINGS]; |
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for (int i = 0; i < NUM_STRINGS; i++) { |
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sa[i] = String.valueOf((char)('a' + i)); |
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} |
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stringArray = sa; |
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} |
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// returns array of [actual, expected] |
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static Object[] a(List<String> act, List<String> exp) { |
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return new Object[] { act, exp }; |
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} |
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@DataProvider(name="empty") |
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public Iterator<Object[]> empty() { |
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return Collections.singletonList( |
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a(List.of(), asList()) |
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).iterator(); |
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} |
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@DataProvider(name="nonempty") |
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public Iterator<Object[]> nonempty() { |
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return asList( |
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a(List.of("a"), |
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asList("a")), |
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a(List.of("a", "b"), |
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asList("a", "b")), |
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a(List.of("a", "b", "c"), |
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asList("a", "b", "c")), |
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a(List.of("a", "b", "c", "d"), |
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asList("a", "b", "c", "d")), |
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a(List.of("a", "b", "c", "d", "e"), |
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asList("a", "b", "c", "d", "e")), |
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a(List.of("a", "b", "c", "d", "e", "f"), |
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asList("a", "b", "c", "d", "e", "f")), |
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a(List.of("a", "b", "c", "d", "e", "f", "g"), |
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asList("a", "b", "c", "d", "e", "f", "g")), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h"), |
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asList("a", "b", "c", "d", "e", "f", "g", "h")), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i"), |
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asList("a", "b", "c", "d", "e", "f", "g", "h", "i")), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j"), |
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asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j")), |
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a(List.of(stringArray), |
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asList(stringArray)) |
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).iterator(); |
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} |
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@DataProvider(name="sublists") |
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public Iterator<Object[]> sublists() { |
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return asList( |
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a(List.<String>of().subList(0,0), |
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asList()), |
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a(List.of("a").subList(0,0), |
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asList("a").subList(0,0)), |
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a(List.of("a", "b").subList(0,1), |
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asList("a", "b").subList(0,1)), |
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a(List.of("a", "b", "c").subList(1,3), |
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asList("a", "b", "c").subList(1,3)), |
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a(List.of("a", "b", "c", "d").subList(0,4), |
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asList("a", "b", "c", "d").subList(0,4)), |
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a(List.of("a", "b", "c", "d", "e").subList(0,3), |
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asList("a", "b", "c", "d", "e").subList(0,3)), |
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a(List.of("a", "b", "c", "d", "e", "f").subList(3, 5), |
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asList("a", "b", "c", "d", "e", "f").subList(3, 5)), |
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a(List.of("a", "b", "c", "d", "e", "f", "g").subList(0, 7), |
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asList("a", "b", "c", "d", "e", "f", "g").subList(0, 7)), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h").subList(0, 0), |
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asList("a", "b", "c", "d", "e", "f", "g", "h").subList(0, 0)), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i").subList(4, 5), |
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asList("a", "b", "c", "d", "e", "f", "g", "h", "i").subList(4, 5)), |
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a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j").subList(1,10), |
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asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j").subList(1,10)), |
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a(List.of(stringArray).subList(5, NUM_STRINGS), |
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asList(Arrays.copyOfRange(stringArray, 5, NUM_STRINGS))) |
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).iterator(); |
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} |
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|
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@DataProvider(name="all") |
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public Iterator<Object[]> all() { |
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List<Object[]> all = new ArrayList<>(); |
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empty().forEachRemaining(all::add); |
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nonempty().forEachRemaining(all::add); |
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sublists().forEachRemaining(all::add); |
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return all.iterator(); |
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} |
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146 |
|
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@DataProvider(name="nonsublists") |
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public Iterator<Object[]> nonsublists() { |
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List<Object[]> all = new ArrayList<>(); |
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empty().forEachRemaining(all::add); |
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nonempty().forEachRemaining(all::add); |
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return all.iterator(); |
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} |
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|
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@Test(dataProvider="all", expectedExceptions=UnsupportedOperationException.class) |
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public void cannotAddLast(List<String> act, List<String> exp) { |
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act.add("x"); |
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} |
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|
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@Test(dataProvider="all", expectedExceptions=UnsupportedOperationException.class) |
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public void cannotAddFirst(List<String> act, List<String> exp) { |
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act.add(0, "x"); |
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} |
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|
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@Test(dataProvider="nonempty", expectedExceptions=UnsupportedOperationException.class) |
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public void cannotRemove(List<String> act, List<String> exp) { |
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act.remove(0); |
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} |
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|
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@Test(dataProvider="nonempty", expectedExceptions=UnsupportedOperationException.class) |
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public void cannotSet(List<String> act, List<String> exp) { |
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act.set(0, "x"); |
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} |
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|
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@Test(dataProvider="all") |
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public void contentsMatch(List<String> act, List<String> exp) { |
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assertEquals(act, exp); |
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} |
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|
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@Test(expectedExceptions=NullPointerException.class) |
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public void nullDisallowed1() { |
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List.of((Object)null); // force one-arg overload |
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} |
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184 |
|
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@Test(expectedExceptions=NullPointerException.class) |
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public void nullDisallowed2a() { |
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List.of("a", null); |
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188 |
} |
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189 |
|
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@Test(expectedExceptions=NullPointerException.class) |
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public void nullDisallowed2b() { |
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List.of(null, "b"); |
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193 |
} |
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194 |
|
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195 |
@Test(expectedExceptions=NullPointerException.class) |
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public void nullDisallowed3() { |
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List.of("a", "b", null); |
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198 |
} |
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199 |
|
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@Test(expectedExceptions=NullPointerException.class) |
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201 |
public void nullDisallowed4() { |
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List.of("a", "b", "c", null); |
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203 |
} |
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204 |
|
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@Test(expectedExceptions=NullPointerException.class) |
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public void nullDisallowed5() { |
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List.of("a", "b", "c", "d", null); |
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208 |
} |
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209 |
|
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210 |
@Test(expectedExceptions=NullPointerException.class) |
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211 |
public void nullDisallowed6() { |
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List.of("a", "b", "c", "d", "e", null); |
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213 |
} |
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214 |
|
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215 |
@Test(expectedExceptions=NullPointerException.class) |
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216 |
public void nullDisallowed7() { |
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List.of("a", "b", "c", "d", "e", "f", null); |
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218 |
} |
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219 |
|
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220 |
@Test(expectedExceptions=NullPointerException.class) |
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221 |
public void nullDisallowed8() { |
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List.of("a", "b", "c", "d", "e", "f", "g", null); |
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223 |
} |
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224 |
|
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225 |
@Test(expectedExceptions=NullPointerException.class) |
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226 |
public void nullDisallowed9() { |
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227 |
List.of("a", "b", "c", "d", "e", "f", "g", "h", null); |
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228 |
} |
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229 |
|
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230 |
@Test(expectedExceptions=NullPointerException.class) |
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231 |
public void nullDisallowed10() { |
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232 |
List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", null); |
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233 |
} |
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234 |
|
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235 |
@Test(expectedExceptions=NullPointerException.class) |
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236 |
public void nullDisallowedN() { |
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237 |
String[] array = stringArray.clone(); |
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238 |
array[0] = null; |
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239 |
List.of(array); |
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240 |
} |
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241 |
|
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242 |
@Test(expectedExceptions=NullPointerException.class) |
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243 |
public void nullArrayDisallowed() { |
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244 |
List.of((Object[])null); |
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245 |
} |
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246 |
|
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247 |
@Test |
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248 |
public void ensureArrayCannotModifyList() { |
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249 |
String[] array = stringArray.clone(); |
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250 |
List<String> list = List.of(array); |
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251 |
array[0] = "xyzzy"; |
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252 |
assertEquals(list, Arrays.asList(stringArray)); |
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253 |
} |
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254 |
|
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255 |
@Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
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256 |
public void containsNullShouldThrowNPE(List<String> act, List<String> exp) { |
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257 |
act.contains(null); |
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} |
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|
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@Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
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public void indexOfNullShouldThrowNPE(List<String> act, List<String> exp) { |
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act.indexOf(null); |
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} |
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|
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@Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
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public void lastIndexOfNullShouldThrowNPE(List<String> act, List<String> exp) { |
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act.lastIndexOf(null); |
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} |
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|
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// List.of().subList views should not be Serializable |
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@Test(dataProvider="sublists") |
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public void isNotSerializable(List<String> act, List<String> exp) { |
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assertFalse(act instanceof Serializable); |
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} |
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|
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// ... but List.of() should be |
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@Test(dataProvider="nonsublists") |
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public void serialEquality(List<String> act, List<String> exp) { |
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// assume that act.equals(exp) tested elsewhere |
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List<String> copy = serialClone(act); |
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assertEquals(act, copy); |
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assertEquals(copy, exp); |
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} |
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|
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@SuppressWarnings("unchecked") |
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static <T> T serialClone(T obj) { |
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try { |
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ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
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try (ObjectOutputStream oos = new ObjectOutputStream(baos)) { |
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oos.writeObject(obj); |
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} |
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ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); |
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ObjectInputStream ois = new ObjectInputStream(bais); |
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return (T) ois.readObject(); |
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} catch (IOException | ClassNotFoundException e) { |
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throw new AssertionError(e); |
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} |
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} |
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|
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List<Integer> genList() { |
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return new ArrayList<>(Arrays.asList(1, 2, 3)); |
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} |
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|
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@Test |
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public void copyOfResultsEqual() { |
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List<Integer> orig = genList(); |
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List<Integer> copy = List.copyOf(orig); |
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|
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assertEquals(orig, copy); |
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assertEquals(copy, orig); |
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} |
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|
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@Test |
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public void copyOfModifiedUnequal() { |
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List<Integer> orig = genList(); |
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List<Integer> copy = List.copyOf(orig); |
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orig.add(4); |
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|
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assertNotEquals(orig, copy); |
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assertNotEquals(copy, orig); |
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} |
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|
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@Test |
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public void copyOfIdentity() { |
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List<Integer> orig = genList(); |
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List<Integer> copy1 = List.copyOf(orig); |
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List<Integer> copy2 = List.copyOf(copy1); |
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|
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assertNotSame(orig, copy1); |
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assertSame(copy1, copy2); |
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} |
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|
50698 | 333 |
@Test |
334 |
public void copyOfSubList() { |
|
335 |
List<Integer> orig = List.of(0, 1, 2, 3); |
|
336 |
List<Integer> sub = orig.subList(0, 3); |
|
337 |
List<Integer> copy = List.copyOf(sub); |
|
338 |
||
339 |
assertNotSame(sub, copy); |
|
340 |
} |
|
341 |
||
342 |
@Test |
|
343 |
public void copyOfSubSubList() { |
|
344 |
List<Integer> orig = List.of(0, 1, 2, 3); |
|
345 |
List<Integer> sub = orig.subList(0, 3).subList(0, 2); |
|
346 |
List<Integer> copy = List.copyOf(sub); |
|
347 |
||
348 |
assertNotSame(sub, copy); |
|
349 |
} |
|
350 |
||
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@Test(expectedExceptions=NullPointerException.class) |
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public void copyOfRejectsNullCollection() { |
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List<Integer> list = List.copyOf(null); |
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} |
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355 |
|
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356 |
@Test(expectedExceptions=NullPointerException.class) |
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public void copyOfRejectsNullElements() { |
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List<Integer> list = List.copyOf(Arrays.asList(1, null, 3)); |
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} |
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} |