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import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.function.Function;
import java.util.function.Predicate;
/**
* @test
* @summary Unit tests for extension methods on Collection
* @library testlibrary
* @build CollectionAsserts CollectionSupplier ExtendsAbstractSet ExtendsAbstractCollection
* @run testng CollectionDefaults
*/
public class CollectionDefaults {
public static final Predicate<Integer> pEven = x -> 0 == x % 2;
public static final Predicate<Integer> pOdd = x -> 1 == x % 2;
private static final int SIZE = 100;
private static final List<Function<Collection<Integer>, Collection<Integer>>> TEST_SUPPLIERS = Arrays.asList(
// Collection
ExtendsAbstractCollection<Integer>::new,
java.util.ArrayDeque<Integer>::new,
java.util.concurrent.ConcurrentLinkedDeque<Integer>::new,
java.util.concurrent.ConcurrentLinkedQueue<Integer>::new,
java.util.concurrent.LinkedBlockingDeque<Integer>::new,
java.util.concurrent.LinkedBlockingQueue<Integer>::new,
java.util.concurrent.LinkedTransferQueue<Integer>::new,
(coll) -> new java.util.concurrent.ArrayBlockingQueue<Integer>(
3 * SIZE, false, coll),
// Lists
java.util.ArrayList<Integer>::new,
java.util.LinkedList<Integer>::new,
java.util.Vector<Integer>::new,
java.util.concurrent.CopyOnWriteArrayList<Integer>::new,
ExtendsAbstractList<Integer>::new,
// Sets
java.util.HashSet<Integer>::new,
java.util.LinkedHashSet<Integer>::new,
java.util.TreeSet<Integer>::new,
java.util.concurrent.ConcurrentSkipListSet<Integer>::new,
java.util.concurrent.CopyOnWriteArraySet<Integer>::new,
ExtendsAbstractSet<Integer>::new
);
@DataProvider(name="setProvider", parallel=true)
public static Iterator<Object[]> setCases() {
final List<Object[]> cases = new LinkedList<>();
cases.add(new Object[] { new HashSet<>() });
cases.add(new Object[] { new LinkedHashSet<>() });
cases.add(new Object[] { new TreeSet<>() });
cases.add(new Object[] { new java.util.concurrent.ConcurrentSkipListSet<>() });
cases.add(new Object[] { new java.util.concurrent.CopyOnWriteArraySet<>() });
cases.add(new Object[] { new ExtendsAbstractSet<>() });
cases.add(new Object[] { Collections.newSetFromMap(new HashMap<>()) });
cases.add(new Object[] { Collections.newSetFromMap(new LinkedHashMap<>()) });
cases.add(new Object[] { Collections.newSetFromMap(new TreeMap<>()) });
cases.add(new Object[] { Collections.newSetFromMap(new ConcurrentHashMap<>()) });
cases.add(new Object[] { Collections.newSetFromMap(new ConcurrentSkipListMap<>()) });
cases.add(new Object[] { new HashSet<Integer>(){{add(42);}} });
cases.add(new Object[] { new ExtendsAbstractSet<Integer>(){{add(42);}} });
cases.add(new Object[] { new LinkedHashSet<Integer>(){{add(42);}} });
cases.add(new Object[] { new TreeSet<Integer>(){{add(42);}} });
return cases.iterator();
}
@Test(dataProvider = "setProvider")
public void testProvidedWithNull(final Set<Integer> set) {
try {
set.forEach(null);
fail("expected NPE not thrown");
} catch (NullPointerException expected) { // expected
}
try {
set.removeIf(null);
fail("expected NPE not thrown");
} catch (NullPointerException expected) { // expected
}
}
@Test
public void testForEach() {
@SuppressWarnings("unchecked")
final CollectionSupplier<Collection<Integer>> supplier = new CollectionSupplier(TEST_SUPPLIERS, SIZE);
for (final CollectionSupplier.TestCase<Collection<Integer>> test : supplier.get()) {
final Collection<Integer> original = test.expected;
final Collection<Integer> set = test.collection;
try {
set.forEach(null);
fail("expected NPE not thrown");
} catch (NullPointerException expected) { // expected
}
if (set instanceof Set && !((set instanceof SortedSet) || (set instanceof LinkedHashSet))) {
CollectionAsserts.assertContentsUnordered(set, original, test.toString());
} else {
CollectionAsserts.assertContents(set, original, test.toString());
}
final List<Integer> actual = new LinkedList<>();
set.forEach(actual::add);
if (set instanceof Set && !((set instanceof SortedSet) || (set instanceof LinkedHashSet))) {
CollectionAsserts.assertContentsUnordered(actual, set, test.toString());
CollectionAsserts.assertContentsUnordered(actual, original, test.toString());
} else {
CollectionAsserts.assertContents(actual, set, test.toString());
CollectionAsserts.assertContents(actual, original, test.toString());
}
}
}
@Test
public void testRemoveIf() {
@SuppressWarnings("unchecked")
final CollectionSupplier<Collection<Integer>> supplier = new CollectionSupplier(TEST_SUPPLIERS, SIZE);
for (final CollectionSupplier.TestCase<Collection<Integer>> test : supplier.get()) {
final Collection<Integer> original = test.expected;
final Collection<Integer> set = test.collection;
try {
set.removeIf(null);
fail("expected NPE not thrown");
} catch (NullPointerException expected) { // expected
}
if (set instanceof Set && !((set instanceof SortedSet) || (set instanceof LinkedHashSet))) {
CollectionAsserts.assertContentsUnordered(set, original, test.toString());
} else {
CollectionAsserts.assertContents(set, original, test.toString());
}
set.removeIf(pEven);
for (int i : set) {
assertTrue((i % 2) == 1);
}
for (int i : original) {
if (i % 2 == 1) {
assertTrue(set.contains(i));
}
}
set.removeIf(pOdd);
assertTrue(set.isEmpty());
}
}
}