| /* |
| * Copyright (c) 2015, 2018, 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. |
| */ |
| package test.java.util.List; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.testng.annotations.DataProvider; |
| import org.testng.annotations.Test; |
| |
| import static java.util.Arrays.asList; |
| |
| import static org.testng.Assert.assertEquals; |
| import static org.testng.Assert.assertFalse; |
| import static org.testng.Assert.assertNotEquals; |
| import static org.testng.Assert.assertNotSame; |
| import static org.testng.Assert.assertSame; |
| import static org.testng.Assert.assertTrue; |
| import static org.testng.Assert.fail; |
| |
| /* |
| * @test |
| * @bug 8048330 8203184 |
| * @summary Test convenience static factory methods on List. |
| * @run testng ListFactories |
| */ |
| @Test |
| public class ListFactories { |
| |
| static final int NUM_STRINGS = 20; // should be larger than the largest fixed-arg overload |
| static final String[] stringArray; |
| static { |
| String[] sa = new String[NUM_STRINGS]; |
| for (int i = 0; i < NUM_STRINGS; i++) { |
| sa[i] = String.valueOf((char)('a' + i)); |
| } |
| stringArray = sa; |
| } |
| |
| // returns array of [actual, expected] |
| static Object[] a(List<String> act, List<String> exp) { |
| return new Object[] { act, exp }; |
| } |
| |
| @DataProvider(name="empty") |
| public Iterator<Object[]> empty() { |
| return Collections.singletonList( |
| a(List.of(), asList()) |
| ).iterator(); |
| } |
| |
| @DataProvider(name="nonempty") |
| public Iterator<Object[]> nonempty() { |
| return asList( |
| a(List.of("a"), |
| asList("a")), |
| a(List.of("a", "b"), |
| asList("a", "b")), |
| a(List.of("a", "b", "c"), |
| asList("a", "b", "c")), |
| a(List.of("a", "b", "c", "d"), |
| asList("a", "b", "c", "d")), |
| a(List.of("a", "b", "c", "d", "e"), |
| asList("a", "b", "c", "d", "e")), |
| a(List.of("a", "b", "c", "d", "e", "f"), |
| asList("a", "b", "c", "d", "e", "f")), |
| a(List.of("a", "b", "c", "d", "e", "f", "g"), |
| asList("a", "b", "c", "d", "e", "f", "g")), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h"), |
| asList("a", "b", "c", "d", "e", "f", "g", "h")), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i"), |
| asList("a", "b", "c", "d", "e", "f", "g", "h", "i")), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j"), |
| asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j")), |
| a(List.of(stringArray), |
| asList(stringArray)) |
| ).iterator(); |
| } |
| |
| @DataProvider(name="sublists") |
| public Iterator<Object[]> sublists() { |
| return asList( |
| a(List.<String>of().subList(0,0), |
| asList()), |
| a(List.of("a").subList(0,0), |
| asList("a").subList(0,0)), |
| a(List.of("a", "b").subList(0,1), |
| asList("a", "b").subList(0,1)), |
| a(List.of("a", "b", "c").subList(1,3), |
| asList("a", "b", "c").subList(1,3)), |
| a(List.of("a", "b", "c", "d").subList(0,4), |
| asList("a", "b", "c", "d").subList(0,4)), |
| a(List.of("a", "b", "c", "d", "e").subList(0,3), |
| asList("a", "b", "c", "d", "e").subList(0,3)), |
| a(List.of("a", "b", "c", "d", "e", "f").subList(3, 5), |
| asList("a", "b", "c", "d", "e", "f").subList(3, 5)), |
| a(List.of("a", "b", "c", "d", "e", "f", "g").subList(0, 7), |
| asList("a", "b", "c", "d", "e", "f", "g").subList(0, 7)), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h").subList(0, 0), |
| asList("a", "b", "c", "d", "e", "f", "g", "h").subList(0, 0)), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i").subList(4, 5), |
| asList("a", "b", "c", "d", "e", "f", "g", "h", "i").subList(4, 5)), |
| a(List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", "j").subList(1,10), |
| asList("a", "b", "c", "d", "e", "f", "g", "h", "i", "j").subList(1,10)), |
| a(List.of(stringArray).subList(5, NUM_STRINGS), |
| asList(Arrays.copyOfRange(stringArray, 5, NUM_STRINGS))) |
| ).iterator(); |
| } |
| |
| @DataProvider(name="all") |
| public Iterator<Object[]> all() { |
| List<Object[]> all = new ArrayList<>(); |
| empty().forEachRemaining(all::add); |
| nonempty().forEachRemaining(all::add); |
| sublists().forEachRemaining(all::add); |
| return all.iterator(); |
| } |
| |
| @DataProvider(name="nonsublists") |
| public Iterator<Object[]> nonsublists() { |
| List<Object[]> all = new ArrayList<>(); |
| empty().forEachRemaining(all::add); |
| nonempty().forEachRemaining(all::add); |
| return all.iterator(); |
| } |
| |
| @Test(dataProvider="all", expectedExceptions=UnsupportedOperationException.class) |
| public void cannotAddLast(List<String> act, List<String> exp) { |
| act.add("x"); |
| } |
| |
| @Test(dataProvider="all", expectedExceptions=UnsupportedOperationException.class) |
| public void cannotAddFirst(List<String> act, List<String> exp) { |
| act.add(0, "x"); |
| } |
| |
| @Test(dataProvider="nonempty", expectedExceptions=UnsupportedOperationException.class) |
| public void cannotRemove(List<String> act, List<String> exp) { |
| act.remove(0); |
| } |
| |
| @Test(dataProvider="nonempty", expectedExceptions=UnsupportedOperationException.class) |
| public void cannotSet(List<String> act, List<String> exp) { |
| act.set(0, "x"); |
| } |
| |
| @Test(dataProvider="all") |
| public void contentsMatch(List<String> act, List<String> exp) { |
| assertEquals(act, exp); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed1() { |
| List.of((Object)null); // force one-arg overload |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed2a() { |
| List.of("a", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed2b() { |
| List.of(null, "b"); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed3() { |
| List.of("a", "b", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed4() { |
| List.of("a", "b", "c", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed5() { |
| List.of("a", "b", "c", "d", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed6() { |
| List.of("a", "b", "c", "d", "e", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed7() { |
| List.of("a", "b", "c", "d", "e", "f", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed8() { |
| List.of("a", "b", "c", "d", "e", "f", "g", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed9() { |
| List.of("a", "b", "c", "d", "e", "f", "g", "h", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowed10() { |
| List.of("a", "b", "c", "d", "e", "f", "g", "h", "i", null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullDisallowedN() { |
| String[] array = stringArray.clone(); |
| array[0] = null; |
| List.of(array); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void nullArrayDisallowed() { |
| List.of((Object[])null); |
| } |
| |
| @Test |
| public void ensureArrayCannotModifyList() { |
| String[] array = stringArray.clone(); |
| List<String> list = List.of(array); |
| array[0] = "xyzzy"; |
| assertEquals(list, Arrays.asList(stringArray)); |
| } |
| |
| @Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
| public void containsNullShouldThrowNPE(List<String> act, List<String> exp) { |
| act.contains(null); |
| } |
| |
| @Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
| public void indexOfNullShouldThrowNPE(List<String> act, List<String> exp) { |
| act.indexOf(null); |
| } |
| |
| @Test(dataProvider="all", expectedExceptions=NullPointerException.class) |
| public void lastIndexOfNullShouldThrowNPE(List<String> act, List<String> exp) { |
| act.lastIndexOf(null); |
| } |
| |
| // List.of().subList views should not be Serializable |
| @Test(dataProvider="sublists") |
| public void isNotSerializable(List<String> act, List<String> exp) { |
| assertFalse(act instanceof Serializable); |
| } |
| |
| // ... but List.of() should be |
| @Test(dataProvider="nonsublists") |
| public void serialEquality(List<String> act, List<String> exp) { |
| // assume that act.equals(exp) tested elsewhere |
| List<String> copy = serialClone(act); |
| assertEquals(act, copy); |
| assertEquals(copy, exp); |
| } |
| |
| @SuppressWarnings("unchecked") |
| static <T> T serialClone(T obj) { |
| try { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (ObjectOutputStream oos = new ObjectOutputStream(baos)) { |
| oos.writeObject(obj); |
| } |
| ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); |
| ObjectInputStream ois = new ObjectInputStream(bais); |
| return (T) ois.readObject(); |
| } catch (IOException | ClassNotFoundException e) { |
| throw new AssertionError(e); |
| } |
| } |
| |
| List<Integer> genList() { |
| return new ArrayList<>(Arrays.asList(1, 2, 3)); |
| } |
| |
| @Test |
| public void copyOfResultsEqual() { |
| List<Integer> orig = genList(); |
| List<Integer> copy = List.copyOf(orig); |
| |
| assertEquals(orig, copy); |
| assertEquals(copy, orig); |
| } |
| |
| @Test |
| public void copyOfModifiedUnequal() { |
| List<Integer> orig = genList(); |
| List<Integer> copy = List.copyOf(orig); |
| orig.add(4); |
| |
| assertNotEquals(orig, copy); |
| assertNotEquals(copy, orig); |
| } |
| |
| @Test |
| public void copyOfIdentity() { |
| List<Integer> orig = genList(); |
| List<Integer> copy1 = List.copyOf(orig); |
| List<Integer> copy2 = List.copyOf(copy1); |
| |
| assertNotSame(orig, copy1); |
| assertSame(copy1, copy2); |
| } |
| |
| @Test |
| public void copyOfSubList() { |
| List<Integer> orig = List.of(0, 1, 2, 3); |
| List<Integer> sub = orig.subList(0, 3); |
| List<Integer> copy = List.copyOf(sub); |
| |
| assertNotSame(sub, copy); |
| } |
| |
| @Test |
| public void copyOfSubSubList() { |
| List<Integer> orig = List.of(0, 1, 2, 3); |
| List<Integer> sub = orig.subList(0, 3).subList(0, 2); |
| List<Integer> copy = List.copyOf(sub); |
| |
| assertNotSame(sub, copy); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void copyOfRejectsNullCollection() { |
| List<Integer> list = List.copyOf(null); |
| } |
| |
| @Test(expectedExceptions=NullPointerException.class) |
| public void copyOfRejectsNullElements() { |
| List<Integer> list = List.copyOf(Arrays.asList(1, null, 3)); |
| } |
| |
| @Test |
| public void iteratorShouldNotBeListIterator() { |
| List<Integer> list = List.of(1, 2, 3, 4, 5); |
| Iterator<Integer> it = list.iterator(); |
| it.next(); |
| try { |
| ((ListIterator<Integer>) it).previous(); |
| fail("ListIterator operation succeeded on Iterator"); |
| } catch (ClassCastException|UnsupportedOperationException ignore) { } |
| } |
| } |