| 1 |
/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
| 3 |
* Expert Group and released to the public domain, as explained at |
| 4 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
| 6 |
* Pat Fisher, Mike Judd. |
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*/ |
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|
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import java.util.ArrayList; |
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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.Iterator; |
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import java.util.List; |
| 15 |
import java.util.ListIterator; |
| 16 |
import java.util.NoSuchElementException; |
| 17 |
import java.util.concurrent.CopyOnWriteArrayList; |
| 18 |
import java.util.concurrent.ThreadLocalRandom; |
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|
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import junit.framework.Test; |
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|
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public class CopyOnWriteArrayListTest extends JSR166TestCase { |
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|
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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class Implementation implements CollectionImplementation { |
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public Class<?> klazz() { return CopyOnWriteArrayList.class; } |
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public List emptyCollection() { return new CopyOnWriteArrayList(); } |
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public Object makeElement(int i) { return JSR166TestCase.itemFor(i); } |
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public boolean isConcurrent() { return true; } |
| 34 |
public boolean permitsNulls() { return true; } |
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} |
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class SubListImplementation extends Implementation { |
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@SuppressWarnings("unchecked") |
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public List emptyCollection() { |
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List list = super.emptyCollection(); |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| 41 |
if (rnd.nextBoolean()) |
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list.add(makeElement(rnd.nextInt())); |
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int i = rnd.nextInt(list.size() + 1); |
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return list.subList(i, i); |
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} |
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} |
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return newTestSuite( |
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CopyOnWriteArrayListTest.class, |
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CollectionTest.testSuite(new Implementation()), |
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CollectionTest.testSuite(new SubListImplementation())); |
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} |
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|
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static CopyOnWriteArrayList<Item> populatedList(int n) { |
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CopyOnWriteArrayList<Item> list = new CopyOnWriteArrayList<>(); |
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assertTrue(list.isEmpty()); |
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for (int i = 0; i < n; i++) |
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mustAdd(list, i); |
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mustEqual(n <= 0, list.isEmpty()); |
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mustEqual(n, list.size()); |
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return list; |
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} |
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|
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static CopyOnWriteArrayList<Item> populatedList(Item[] elements) { |
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CopyOnWriteArrayList<Item> list = new CopyOnWriteArrayList<>(); |
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assertTrue(list.isEmpty()); |
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for (Item element : elements) |
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list.add(element); |
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assertFalse(list.isEmpty()); |
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mustEqual(elements.length, list.size()); |
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return list; |
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} |
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|
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/** |
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* a new list is empty |
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*/ |
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public void testConstructor() { |
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List<Item> list = new CopyOnWriteArrayList<>(); |
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assertTrue(list.isEmpty()); |
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} |
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|
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/** |
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* new list contains all elements of initializing array |
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*/ |
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public void testConstructor2() { |
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Item[] elts = defaultItems; |
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List<Item> list = new CopyOnWriteArrayList<>(elts); |
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for (int i = 0; i < SIZE; ++i) |
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mustEqual(elts[i], list.get(i)); |
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} |
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|
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/** |
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* new list contains all elements of initializing collection |
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*/ |
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public void testConstructor3() { |
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Item[] elts = defaultItems; |
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List<Item> list = new CopyOnWriteArrayList<>(Arrays.asList(elts)); |
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for (int i = 0; i < SIZE; ++i) |
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mustEqual(elts[i], list.get(i)); |
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} |
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|
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/** |
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* addAll adds each element from the given collection, including duplicates |
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*/ |
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public void testAddAll() { |
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List<Item> list = populatedList(3); |
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assertTrue(list.addAll(Arrays.asList(three, four, five))); |
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mustEqual(6, list.size()); |
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assertTrue(list.addAll(Arrays.asList(three, four, five))); |
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mustEqual(9, list.size()); |
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} |
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|
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/** |
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* addAllAbsent adds each element from the given collection that did not |
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* already exist in the List |
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*/ |
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public void testAddAllAbsent() { |
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CopyOnWriteArrayList<Item> list = populatedList(3); |
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// "one" is duplicate and will not be added |
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mustEqual(2, list.addAllAbsent(Arrays.asList(three, four, one))); |
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mustEqual(5, list.size()); |
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mustEqual(0, list.addAllAbsent(Arrays.asList(three, four, one))); |
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mustEqual(5, list.size()); |
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} |
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|
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/** |
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* addIfAbsent will not add the element if it already exists in the list |
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*/ |
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public void testAddIfAbsent() { |
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CopyOnWriteArrayList<Item> list = populatedList(SIZE); |
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list.addIfAbsent(one); |
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mustEqual(SIZE, list.size()); |
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} |
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|
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/** |
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* addIfAbsent adds the element when it does not exist in the list |
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*/ |
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public void testAddIfAbsent2() { |
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CopyOnWriteArrayList<Item> list = populatedList(SIZE); |
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list.addIfAbsent(three); |
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mustContain(list, three); |
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} |
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|
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/** |
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* clear removes all elements from the list |
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*/ |
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public void testClear() { |
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List<Item> list = populatedList(SIZE); |
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list.clear(); |
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mustEqual(0, list.size()); |
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} |
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|
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/** |
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* Cloned list is equal |
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*/ |
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public void testClone() { |
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CopyOnWriteArrayList<Item> l1 = populatedList(SIZE); |
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@SuppressWarnings("unchecked") |
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CopyOnWriteArrayList<Item> l2 = (CopyOnWriteArrayList<Item>)(l1.clone()); |
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mustEqual(l1, l2); |
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l1.clear(); |
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assertFalse(l1.equals(l2)); |
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} |
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|
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/** |
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* contains is true for added elements |
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*/ |
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public void testContains() { |
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List<Item> list = populatedList(3); |
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mustContain(list, one); |
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mustNotContain(list, five); |
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} |
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|
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/** |
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* adding at an index places it in the indicated index |
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*/ |
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public void testAddIndex() { |
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List<Item> list = populatedList(3); |
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list.add(0, minusOne); |
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mustEqual(4, list.size()); |
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mustEqual(minusOne, list.get(0)); |
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mustEqual(zero, list.get(1)); |
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|
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list.add(2, minusTwo); |
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mustEqual(5, list.size()); |
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mustEqual(minusTwo, list.get(2)); |
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mustEqual(two, list.get(4)); |
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} |
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|
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/** |
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* lists with same elements are equal and have same hashCode |
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*/ |
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public void testEquals() { |
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List<Item> a = populatedList(3); |
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List<Item> b = populatedList(3); |
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assertTrue(a.equals(b)); |
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assertTrue(b.equals(a)); |
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assertTrue(a.containsAll(b)); |
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assertTrue(b.containsAll(a)); |
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mustEqual(a.hashCode(), b.hashCode()); |
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a.add(minusOne); |
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assertFalse(a.equals(b)); |
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assertFalse(b.equals(a)); |
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assertTrue(a.containsAll(b)); |
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assertFalse(b.containsAll(a)); |
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b.add(minusOne); |
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assertTrue(a.equals(b)); |
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assertTrue(b.equals(a)); |
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assertTrue(a.containsAll(b)); |
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assertTrue(b.containsAll(a)); |
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mustEqual(a.hashCode(), b.hashCode()); |
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|
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assertFalse(a.equals(null)); |
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} |
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|
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/** |
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* containsAll returns true for collections with subset of elements |
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*/ |
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public void testContainsAll() { |
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List<Item> list = populatedList(3); |
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assertTrue(list.containsAll(Arrays.asList())); |
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assertTrue(list.containsAll(Arrays.asList(one))); |
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assertTrue(list.containsAll(Arrays.asList(one, two))); |
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assertFalse(list.containsAll(Arrays.asList(one, two, six))); |
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assertFalse(list.containsAll(Arrays.asList(six))); |
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|
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try { |
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list.containsAll(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* get returns the value at the given index |
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*/ |
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public void testGet() { |
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List<Item> list = populatedList(3); |
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mustEqual(0, list.get(0)); |
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} |
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|
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/** |
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* indexOf(Object) returns the index of the first occurrence of the |
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* specified element in this list, or -1 if this list does not |
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* contain the element |
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*/ |
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public void testIndexOf() { |
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List<Item> list = populatedList(3); |
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mustEqual(-1, list.indexOf(minusTen)); |
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int size = list.size(); |
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for (int i = 0; i < size; i++) { |
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Item I = itemFor(i); |
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mustEqual(i, list.indexOf(I)); |
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mustEqual(i, list.subList(0, size).indexOf(I)); |
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mustEqual(i, list.subList(0, i + 1).indexOf(I)); |
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mustEqual(-1, list.subList(0, i).indexOf(I)); |
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mustEqual(0, list.subList(i, size).indexOf(I)); |
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mustEqual(-1, list.subList(i + 1, size).indexOf(I)); |
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} |
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|
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list.add(one); |
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mustEqual(1, list.indexOf(one)); |
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mustEqual(1, list.subList(0, size + 1).indexOf(one)); |
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mustEqual(0, list.subList(1, size + 1).indexOf(one)); |
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mustEqual(size - 2, list.subList(2, size + 1).indexOf(one)); |
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mustEqual(0, list.subList(size, size + 1).indexOf(one)); |
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mustEqual(-1, list.subList(size + 1, size + 1).indexOf(one)); |
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} |
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|
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/** |
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* indexOf(E, int) returns the index of the first occurrence of the |
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* specified element in this list, searching forwards from index, |
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* or returns -1 if the element is not found |
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*/ |
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public void testIndexOf2() { |
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CopyOnWriteArrayList<Item> list = populatedList(3); |
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int size = list.size(); |
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mustEqual(-1, list.indexOf(minusTen, 0)); |
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|
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// we might expect IOOBE, but spec says otherwise |
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mustEqual(-1, list.indexOf(zero, size)); |
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mustEqual(-1, list.indexOf(zero, Integer.MAX_VALUE)); |
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|
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assertThrows( |
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IndexOutOfBoundsException.class, |
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() -> list.indexOf(zero, -1), |
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() -> list.indexOf(zero, Integer.MIN_VALUE)); |
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|
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for (int i = 0; i < size; i++) { |
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Item I = itemFor(i); |
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mustEqual(i, list.indexOf(I, 0)); |
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mustEqual(i, list.indexOf(I, i)); |
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mustEqual(-1, list.indexOf(I, i + 1)); |
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} |
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|
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list.add(one); |
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mustEqual(1, list.indexOf(one, 0)); |
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mustEqual(1, list.indexOf(one, 1)); |
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mustEqual(size, list.indexOf(one, 2)); |
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mustEqual(size, list.indexOf(one, size)); |
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} |
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|
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/** |
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* isEmpty returns true when empty, else false |
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*/ |
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public void testIsEmpty() { |
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List<Item> empty = new CopyOnWriteArrayList<>(); |
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assertTrue(empty.isEmpty()); |
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assertTrue(empty.subList(0, 0).isEmpty()); |
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|
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List<Item> full = populatedList(SIZE); |
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assertFalse(full.isEmpty()); |
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assertTrue(full.subList(0, 0).isEmpty()); |
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assertTrue(full.subList(SIZE, SIZE).isEmpty()); |
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} |
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|
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/** |
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* iterator() returns an iterator containing the elements of the |
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* list in insertion order |
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*/ |
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public void testIterator() { |
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Collection<Item> empty = new CopyOnWriteArrayList<>(); |
| 321 |
assertFalse(empty.iterator().hasNext()); |
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try { |
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empty.iterator().next(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
| 326 |
|
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Item[] elements = seqItems(SIZE); |
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shuffle(elements); |
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Collection<Item> full = populatedList(elements); |
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|
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Iterator<? extends Item> it = full.iterator(); |
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for (int j = 0; j < SIZE; j++) { |
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assertTrue(it.hasNext()); |
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mustEqual(elements[j], it.next()); |
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} |
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assertIteratorExhausted(it); |
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} |
| 338 |
|
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/** |
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* iterator of empty collection has no elements |
| 341 |
*/ |
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public void testEmptyIterator() { |
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Collection<Item> c = new CopyOnWriteArrayList<>(); |
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assertIteratorExhausted(c.iterator()); |
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} |
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|
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/** |
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* iterator.remove throws UnsupportedOperationException |
| 349 |
*/ |
| 350 |
public void testIteratorRemove() { |
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CopyOnWriteArrayList<Item> list = populatedList(SIZE); |
| 352 |
Iterator<? extends Item> it = list.iterator(); |
| 353 |
it.next(); |
| 354 |
try { |
| 355 |
it.remove(); |
| 356 |
shouldThrow(); |
| 357 |
} catch (UnsupportedOperationException success) {} |
| 358 |
} |
| 359 |
|
| 360 |
/** |
| 361 |
* toString contains toString of elements |
| 362 |
*/ |
| 363 |
public void testToString() { |
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mustEqual("[]", new CopyOnWriteArrayList<>().toString()); |
| 365 |
List<Item> list = populatedList(3); |
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String s = list.toString(); |
| 367 |
for (int i = 0; i < 3; ++i) |
| 368 |
assertTrue(s.contains(String.valueOf(i))); |
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mustEqual(new ArrayList<Item>(list).toString(), |
| 370 |
list.toString()); |
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} |
| 372 |
|
| 373 |
/** |
| 374 |
* lastIndexOf(Object) returns the index of the last occurrence of |
| 375 |
* the specified element in this list, or -1 if this list does not |
| 376 |
* contain the element |
| 377 |
*/ |
| 378 |
public void testLastIndexOf1() { |
| 379 |
List<Item> list = populatedList(3); |
| 380 |
mustEqual(-1, list.lastIndexOf(itemFor(-42))); |
| 381 |
int size = list.size(); |
| 382 |
for (int i = 0; i < size; i++) { |
| 383 |
Item I = itemFor(i); |
| 384 |
mustEqual(i, list.lastIndexOf(I)); |
| 385 |
mustEqual(i, list.subList(0, size).lastIndexOf(I)); |
| 386 |
mustEqual(i, list.subList(0, i + 1).lastIndexOf(I)); |
| 387 |
mustEqual(-1, list.subList(0, i).lastIndexOf(I)); |
| 388 |
mustEqual(0, list.subList(i, size).lastIndexOf(I)); |
| 389 |
mustEqual(-1, list.subList(i + 1, size).lastIndexOf(I)); |
| 390 |
} |
| 391 |
|
| 392 |
list.add(one); |
| 393 |
mustEqual(size, list.lastIndexOf(one)); |
| 394 |
mustEqual(size, list.subList(0, size + 1).lastIndexOf(one)); |
| 395 |
mustEqual(1, list.subList(0, size).lastIndexOf(one)); |
| 396 |
mustEqual(0, list.subList(1, 2).lastIndexOf(one)); |
| 397 |
mustEqual(-1, list.subList(0, 1).indexOf(one)); |
| 398 |
} |
| 399 |
|
| 400 |
/** |
| 401 |
* lastIndexOf(E, int) returns the index of the last occurrence of the |
| 402 |
* specified element in this list, searching backwards from index, or |
| 403 |
* returns -1 if the element is not found |
| 404 |
*/ |
| 405 |
public void testLastIndexOf2() { |
| 406 |
CopyOnWriteArrayList<Item> list = populatedList(3); |
| 407 |
|
| 408 |
// we might expect IOOBE, but spec says otherwise |
| 409 |
mustEqual(-1, list.lastIndexOf(zero, -1)); |
| 410 |
|
| 411 |
int size = list.size(); |
| 412 |
assertThrows( |
| 413 |
IndexOutOfBoundsException.class, |
| 414 |
() -> list.lastIndexOf(zero, size), |
| 415 |
() -> list.lastIndexOf(zero, Integer.MAX_VALUE)); |
| 416 |
|
| 417 |
for (int i = 0; i < size; i++) { |
| 418 |
Item I = itemFor(i); |
| 419 |
mustEqual(i, list.lastIndexOf(I, i)); |
| 420 |
mustEqual(list.indexOf(I), list.lastIndexOf(I, i)); |
| 421 |
if (i > 0) |
| 422 |
mustEqual(-1, list.lastIndexOf(I, i - 1)); |
| 423 |
} |
| 424 |
list.add(one); |
| 425 |
list.add(three); |
| 426 |
mustEqual(1, list.lastIndexOf(one, 1)); |
| 427 |
mustEqual(1, list.lastIndexOf(one, 2)); |
| 428 |
mustEqual(3, list.lastIndexOf(one, 3)); |
| 429 |
mustEqual(3, list.lastIndexOf(one, 4)); |
| 430 |
mustEqual(-1, list.lastIndexOf(three, 3)); |
| 431 |
} |
| 432 |
|
| 433 |
/** |
| 434 |
* listIterator traverses all elements |
| 435 |
*/ |
| 436 |
public void testListIterator1() { |
| 437 |
List<Item> list = populatedList(SIZE); |
| 438 |
ListIterator<? extends Item> i = list.listIterator(); |
| 439 |
int j; |
| 440 |
for (j = 0; i.hasNext(); j++) |
| 441 |
mustEqual(j, i.next()); |
| 442 |
mustEqual(SIZE, j); |
| 443 |
} |
| 444 |
|
| 445 |
/** |
| 446 |
* listIterator only returns those elements after the given index |
| 447 |
*/ |
| 448 |
public void testListIterator2() { |
| 449 |
List<Item> list = populatedList(3); |
| 450 |
ListIterator<? extends Item> i = list.listIterator(1); |
| 451 |
int j; |
| 452 |
for (j = 0; i.hasNext(); j++) |
| 453 |
mustEqual(j + 1, i.next()); |
| 454 |
mustEqual(2, j); |
| 455 |
} |
| 456 |
|
| 457 |
/** |
| 458 |
* remove(int) removes and returns the object at the given index |
| 459 |
*/ |
| 460 |
public void testRemove_int() { |
| 461 |
int SIZE = 3; |
| 462 |
for (int i = 0; i < SIZE; i++) { |
| 463 |
List<Item> list = populatedList(SIZE); |
| 464 |
mustEqual(i, list.remove(i)); |
| 465 |
mustEqual(SIZE - 1, list.size()); |
| 466 |
mustNotContain(list, i); |
| 467 |
} |
| 468 |
} |
| 469 |
|
| 470 |
/** |
| 471 |
* remove(Object) removes the object if found and returns true |
| 472 |
*/ |
| 473 |
public void testRemove_Object() { |
| 474 |
int SIZE = 3; |
| 475 |
for (int i = 0; i < SIZE; i++) { |
| 476 |
List<Item> list = populatedList(SIZE); |
| 477 |
mustNotRemove(list, fortytwo); |
| 478 |
mustRemove(list, i); |
| 479 |
mustEqual(SIZE - 1, list.size()); |
| 480 |
mustNotContain(list, i); |
| 481 |
} |
| 482 |
CopyOnWriteArrayList<Item> x = new CopyOnWriteArrayList<>(Arrays.asList(four, five, six)); |
| 483 |
mustRemove(x, six); |
| 484 |
mustEqual(x, Arrays.asList(four, five)); |
| 485 |
mustRemove(x, four); |
| 486 |
mustEqual(x, Arrays.asList(five)); |
| 487 |
mustRemove(x, five); |
| 488 |
mustEqual(x, Arrays.asList()); |
| 489 |
mustNotRemove(x, five); |
| 490 |
} |
| 491 |
|
| 492 |
/** |
| 493 |
* removeAll removes all elements from the given collection |
| 494 |
*/ |
| 495 |
public void testRemoveAll() { |
| 496 |
List<Item> list = populatedList(3); |
| 497 |
assertTrue(list.removeAll(Arrays.asList(one, two))); |
| 498 |
mustEqual(1, list.size()); |
| 499 |
assertFalse(list.removeAll(Arrays.asList(one, two))); |
| 500 |
mustEqual(1, list.size()); |
| 501 |
} |
| 502 |
|
| 503 |
/** |
| 504 |
* set changes the element at the given index |
| 505 |
*/ |
| 506 |
public void testSet() { |
| 507 |
List<Item> list = populatedList(3); |
| 508 |
mustEqual(2, list.set(2, four)); |
| 509 |
mustEqual(4, list.get(2)); |
| 510 |
} |
| 511 |
|
| 512 |
/** |
| 513 |
* size returns the number of elements |
| 514 |
*/ |
| 515 |
public void testSize() { |
| 516 |
List<Item> empty = new CopyOnWriteArrayList<>(); |
| 517 |
mustEqual(0, empty.size()); |
| 518 |
mustEqual(0, empty.subList(0, 0).size()); |
| 519 |
|
| 520 |
List<Item> full = populatedList(SIZE); |
| 521 |
mustEqual(SIZE, full.size()); |
| 522 |
mustEqual(0, full.subList(0, 0).size()); |
| 523 |
mustEqual(0, full.subList(SIZE, SIZE).size()); |
| 524 |
} |
| 525 |
|
| 526 |
/** |
| 527 |
* toArray() returns an Object array containing all elements from |
| 528 |
* the list in insertion order |
| 529 |
*/ |
| 530 |
public void testToArray() { |
| 531 |
Object[] a = new CopyOnWriteArrayList<>().toArray(); |
| 532 |
assertTrue(Arrays.equals(new Object[0], a)); |
| 533 |
assertSame(Object[].class, a.getClass()); |
| 534 |
|
| 535 |
Item[] elements = seqItems(SIZE); |
| 536 |
shuffle(elements); |
| 537 |
Collection<Item> full = populatedList(elements); |
| 538 |
|
| 539 |
assertTrue(Arrays.equals(elements, full.toArray())); |
| 540 |
assertSame(Object[].class, full.toArray().getClass()); |
| 541 |
} |
| 542 |
|
| 543 |
/** |
| 544 |
* toArray(Item array) returns an Item array containing all |
| 545 |
* elements from the list in insertion order |
| 546 |
*/ |
| 547 |
public void testToArray2() { |
| 548 |
Collection<Item> empty = new CopyOnWriteArrayList<>(); |
| 549 |
Item[] a; |
| 550 |
|
| 551 |
a = new Item[0]; |
| 552 |
assertSame(a, empty.toArray(a)); |
| 553 |
|
| 554 |
a = new Item[SIZE / 2]; |
| 555 |
Arrays.fill(a, fortytwo); |
| 556 |
assertSame(a, empty.toArray(a)); |
| 557 |
assertNull(a[0]); |
| 558 |
for (int i = 1; i < a.length; i++) |
| 559 |
mustEqual(42, a[i]); |
| 560 |
|
| 561 |
Item[] elements = seqItems(SIZE); |
| 562 |
shuffle(elements); |
| 563 |
Collection<Item> full = populatedList(elements); |
| 564 |
|
| 565 |
Arrays.fill(a, fortytwo); |
| 566 |
assertTrue(Arrays.equals(elements, full.toArray(a))); |
| 567 |
for (int i = 0; i < a.length; i++) |
| 568 |
mustEqual(42, a[i]); |
| 569 |
assertSame(Item[].class, full.toArray(a).getClass()); |
| 570 |
|
| 571 |
a = new Item[SIZE]; |
| 572 |
Arrays.fill(a, fortytwo); |
| 573 |
assertSame(a, full.toArray(a)); |
| 574 |
assertTrue(Arrays.equals(elements, a)); |
| 575 |
|
| 576 |
a = new Item[2 * SIZE]; |
| 577 |
Arrays.fill(a, fortytwo); |
| 578 |
assertSame(a, full.toArray(a)); |
| 579 |
assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
| 580 |
assertNull(a[SIZE]); |
| 581 |
for (int i = SIZE + 1; i < a.length; i++) |
| 582 |
mustEqual(42, a[i]); |
| 583 |
} |
| 584 |
|
| 585 |
/** |
| 586 |
* sublists contains elements at indexes offset from their base |
| 587 |
*/ |
| 588 |
public void testSubList() { |
| 589 |
List<Item> a = populatedList(10); |
| 590 |
assertTrue(a.subList(1,1).isEmpty()); |
| 591 |
for (int j = 0; j < 9; ++j) { |
| 592 |
for (int i = j ; i < 10; ++i) { |
| 593 |
List<Item> b = a.subList(j,i); |
| 594 |
for (int k = j; k < i; ++k) { |
| 595 |
mustEqual(itemFor(k), b.get(k-j)); |
| 596 |
} |
| 597 |
} |
| 598 |
} |
| 599 |
|
| 600 |
List<Item> s = a.subList(2, 5); |
| 601 |
mustEqual(3, s.size()); |
| 602 |
s.set(2, minusOne); |
| 603 |
mustEqual(a.get(4), minusOne); |
| 604 |
s.clear(); |
| 605 |
mustEqual(7, a.size()); |
| 606 |
|
| 607 |
assertThrows( |
| 608 |
IndexOutOfBoundsException.class, |
| 609 |
() -> s.get(0), |
| 610 |
() -> s.set(0, fortytwo)); |
| 611 |
} |
| 612 |
|
| 613 |
// Exception tests |
| 614 |
|
| 615 |
/** |
| 616 |
* toArray throws an ArrayStoreException when the given array |
| 617 |
* can not store the objects inside the list |
| 618 |
*/ |
| 619 |
@SuppressWarnings("CollectionToArraySafeParameter") |
| 620 |
public void testToArray_ArrayStoreException() { |
| 621 |
List<Item> list = new CopyOnWriteArrayList<>(); |
| 622 |
// Items are not auto-converted to Longs |
| 623 |
list.add(eightysix); |
| 624 |
list.add(ninetynine); |
| 625 |
assertThrows( |
| 626 |
ArrayStoreException.class, |
| 627 |
() -> list.toArray(new Long[0]), |
| 628 |
() -> list.toArray(new Long[5])); |
| 629 |
} |
| 630 |
|
| 631 |
@SuppressWarnings("unchecked") |
| 632 |
void testIndexOutOfBoundsException(List list) { |
| 633 |
int size = list.size(); |
| 634 |
assertThrows( |
| 635 |
IndexOutOfBoundsException.class, |
| 636 |
() -> list.get(-1), |
| 637 |
() -> list.get(size), |
| 638 |
() -> list.set(-1, "qwerty"), |
| 639 |
() -> list.set(size, "qwerty"), |
| 640 |
() -> list.add(-1, "qwerty"), |
| 641 |
() -> list.add(size + 1, "qwerty"), |
| 642 |
() -> list.remove(-1), |
| 643 |
() -> list.remove(size), |
| 644 |
() -> list.addAll(-1, Collections.emptyList()), |
| 645 |
() -> list.addAll(size + 1, Collections.emptyList()), |
| 646 |
() -> list.listIterator(-1), |
| 647 |
() -> list.listIterator(size + 1), |
| 648 |
() -> list.subList(-1, size), |
| 649 |
() -> list.subList(0, size + 1)); |
| 650 |
|
| 651 |
// Conversely, operations that must not throw |
| 652 |
list.addAll(0, Collections.emptyList()); |
| 653 |
list.addAll(size, Collections.emptyList()); |
| 654 |
list.add(0, "qwerty"); |
| 655 |
list.add(list.size(), "qwerty"); |
| 656 |
list.get(0); |
| 657 |
list.get(list.size() - 1); |
| 658 |
list.set(0, "azerty"); |
| 659 |
list.set(list.size() - 1, "azerty"); |
| 660 |
list.listIterator(0); |
| 661 |
list.listIterator(list.size()); |
| 662 |
list.subList(0, list.size()); |
| 663 |
list.remove(list.size() - 1); |
| 664 |
} |
| 665 |
|
| 666 |
/** |
| 667 |
* IndexOutOfBoundsException is thrown when specified |
| 668 |
*/ |
| 669 |
public void testIndexOutOfBoundsException() { |
| 670 |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| 671 |
List<Item> x = populatedList(rnd.nextInt(5)); |
| 672 |
testIndexOutOfBoundsException(x); |
| 673 |
|
| 674 |
int start = rnd.nextInt(x.size() + 1); |
| 675 |
int end = rnd.nextInt(start, x.size() + 1); |
| 676 |
assertThrows( |
| 677 |
IndexOutOfBoundsException.class, |
| 678 |
() -> x.subList(start, start - 1)); |
| 679 |
List<Item> subList = x.subList(start, end); |
| 680 |
testIndexOutOfBoundsException(x); |
| 681 |
} |
| 682 |
|
| 683 |
/** |
| 684 |
* a deserialized/reserialized list equals original |
| 685 |
*/ |
| 686 |
public void testSerialization() throws Exception { |
| 687 |
List<Item> x = populatedList(SIZE); |
| 688 |
List<Item> y = serialClone(x); |
| 689 |
|
| 690 |
assertNotSame(x, y); |
| 691 |
mustEqual(x.size(), y.size()); |
| 692 |
mustEqual(x.toString(), y.toString()); |
| 693 |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
| 694 |
mustEqual(x, y); |
| 695 |
mustEqual(y, x); |
| 696 |
while (!x.isEmpty()) { |
| 697 |
assertFalse(y.isEmpty()); |
| 698 |
mustEqual(x.remove(0), y.remove(0)); |
| 699 |
} |
| 700 |
assertTrue(y.isEmpty()); |
| 701 |
} |
| 702 |
|
| 703 |
} |
