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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* 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; |
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import java.util.ListIterator; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.CopyOnWriteArrayList; |
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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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} |
27 |
|
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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; } |
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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(); |
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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)); |
297 |
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 |
303 |
*/ |
304 |
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); |
310 |
assertFalse(full.isEmpty()); |
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assertTrue(full.subList(0, 0).isEmpty()); |
312 |
assertTrue(full.subList(SIZE, SIZE).isEmpty()); |
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} |
314 |
|
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/** |
316 |
* iterator() returns an iterator containing the elements of the |
317 |
* list in insertion order |
318 |
*/ |
319 |
public void testIterator() { |
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Collection<Item> empty = new CopyOnWriteArrayList<>(); |
321 |
assertFalse(empty.iterator().hasNext()); |
322 |
try { |
323 |
empty.iterator().next(); |
324 |
shouldThrow(); |
325 |
} catch (NoSuchElementException success) {} |
326 |
|
327 |
Item[] elements = seqItems(SIZE); |
328 |
shuffle(elements); |
329 |
Collection<Item> full = populatedList(elements); |
330 |
|
331 |
Iterator<? extends Item> it = full.iterator(); |
332 |
for (int j = 0; j < SIZE; j++) { |
333 |
assertTrue(it.hasNext()); |
334 |
mustEqual(elements[j], it.next()); |
335 |
} |
336 |
assertIteratorExhausted(it); |
337 |
} |
338 |
|
339 |
/** |
340 |
* iterator of empty collection has no elements |
341 |
*/ |
342 |
public void testEmptyIterator() { |
343 |
Collection<Item> c = new CopyOnWriteArrayList<>(); |
344 |
assertIteratorExhausted(c.iterator()); |
345 |
} |
346 |
|
347 |
/** |
348 |
* iterator.remove throws UnsupportedOperationException |
349 |
*/ |
350 |
public void testIteratorRemove() { |
351 |
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); |
366 |
String s = list.toString(); |
367 |
for (int i = 0; i < 3; ++i) |
368 |
assertTrue(s.contains(String.valueOf(i))); |
369 |
mustEqual(new ArrayList<Item>(list).toString(), |
370 |
list.toString()); |
371 |
} |
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 |
} |