| /* |
| * Copyright (C) 2007 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.google.common.collect; |
| |
| import static com.google.common.collect.Iterables.unmodifiableIterable; |
| import static com.google.common.collect.Sets.newEnumSet; |
| import static com.google.common.collect.Sets.newHashSet; |
| import static com.google.common.collect.Sets.newLinkedHashSet; |
| import static com.google.common.collect.Sets.powerSet; |
| import static com.google.common.collect.testing.IteratorFeature.UNMODIFIABLE; |
| import static com.google.common.collect.testing.testers.CollectionIteratorTester.getIteratorKnownOrderRemoveSupportedMethod; |
| import static java.io.ObjectStreamConstants.TC_REFERENCE; |
| import static java.io.ObjectStreamConstants.baseWireHandle; |
| import static java.util.Collections.emptySet; |
| import static java.util.Collections.singleton; |
| import static org.truth0.Truth.ASSERT; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.annotations.GwtIncompatible; |
| import com.google.common.collect.testing.AnEnum; |
| import com.google.common.collect.testing.IteratorTester; |
| import com.google.common.collect.testing.MinimalIterable; |
| import com.google.common.collect.testing.SetTestSuiteBuilder; |
| import com.google.common.collect.testing.TestEnumSetGenerator; |
| import com.google.common.collect.testing.TestStringSetGenerator; |
| import com.google.common.collect.testing.features.CollectionFeature; |
| import com.google.common.collect.testing.features.CollectionSize; |
| import com.google.common.collect.testing.features.SetFeature; |
| import com.google.common.testing.EqualsTester; |
| import com.google.common.testing.NullPointerTester; |
| import com.google.common.testing.SerializableTester; |
| |
| import junit.framework.Test; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| |
| 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.nio.ByteBuffer; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.EnumSet; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| import java.util.concurrent.CopyOnWriteArraySet; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Unit test for {@code Sets}. |
| * |
| * @author Kevin Bourrillion |
| * @author Jared Levy |
| */ |
| @GwtCompatible(emulated = true) |
| public class SetsTest extends TestCase { |
| |
| private static final IteratorTester.KnownOrder KNOWN_ORDER = |
| IteratorTester.KnownOrder.KNOWN_ORDER; |
| |
| private static final Collection<Integer> EMPTY_COLLECTION |
| = Arrays.<Integer>asList(); |
| |
| private static final Collection<Integer> SOME_COLLECTION |
| = Arrays.asList(0, 1, 1); |
| |
| private static final Iterable<Integer> SOME_ITERABLE |
| = new Iterable<Integer>() { |
| @Override |
| public Iterator<Integer> iterator() { |
| return SOME_COLLECTION.iterator(); |
| } |
| }; |
| |
| private static final List<Integer> LONGER_LIST |
| = Arrays.asList(8, 6, 7, 5, 3, 0, 9); |
| |
| private static final Comparator<Integer> SOME_COMPARATOR |
| = Collections.reverseOrder(); |
| |
| @GwtIncompatible("suite") |
| public static Test suite() { |
| TestSuite suite = new TestSuite(); |
| suite.addTestSuite(SetsTest.class); |
| |
| suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override protected Set<String> create(String[] elements) { |
| return Sets.newConcurrentHashSet(Arrays.asList(elements)); |
| } |
| }) |
| .named("Sets.newConcurrentHashSet") |
| .withFeatures(CollectionSize.ANY, SetFeature.GENERAL_PURPOSE) |
| .createTestSuite()); |
| |
| suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override protected Set<String> create(String[] elements) { |
| int size = elements.length; |
| // Remove last element, if size > 1 |
| Set<String> set1 = (size > 1) |
| ? Sets.newHashSet( |
| Arrays.asList(elements).subList(0, size - 1)) |
| : Sets.newHashSet(elements); |
| // Remove first element, if size > 0 |
| Set<String> set2 = (size > 0) |
| ? Sets.newHashSet( |
| Arrays.asList(elements).subList(1, size)) |
| : Sets.<String>newHashSet(); |
| return Sets.union(set1, set2); |
| } |
| }) |
| .named("Sets.union") |
| .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES) |
| .createTestSuite()); |
| |
| suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override protected Set<String> create(String[] elements) { |
| Set<String> set1 = Sets.newHashSet(elements); |
| set1.add(samples().e3); |
| Set<String> set2 = Sets.newHashSet(elements); |
| set2.add(samples().e4); |
| return Sets.intersection(set1, set2); |
| } |
| }) |
| .named("Sets.intersection") |
| .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES) |
| .createTestSuite()); |
| |
| suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override protected Set<String> create(String[] elements) { |
| Set<String> set1 = Sets.newHashSet(elements); |
| set1.add(samples().e3); |
| Set<String> set2 = Sets.newHashSet(samples().e3); |
| return Sets.difference(set1, set2); |
| } |
| }) |
| .named("Sets.difference") |
| .withFeatures(CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_VALUES) |
| .createTestSuite()); |
| |
| suite.addTest(SetTestSuiteBuilder.using(new TestEnumSetGenerator() { |
| @Override protected Set<AnEnum> create(AnEnum[] elements) { |
| AnEnum[] otherElements = new AnEnum[elements.length - 1]; |
| System.arraycopy( |
| elements, 1, otherElements, 0, otherElements.length); |
| return Sets.immutableEnumSet(elements[0], otherElements); |
| } |
| }) |
| .named("Sets.immutableEnumSet") |
| .withFeatures(CollectionSize.ONE, CollectionSize.SEVERAL, |
| CollectionFeature.ALLOWS_NULL_QUERIES) |
| .createTestSuite()); |
| |
| suite.addTest(testsForFilter()); |
| suite.addTest(testsForFilterNoNulls()); |
| suite.addTest(testsForFilterFiltered()); |
| |
| return suite; |
| } |
| |
| @GwtIncompatible("suite") |
| private static Test testsForFilter() { |
| return SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override public Set<String> create(String[] elements) { |
| Set<String> unfiltered = Sets.newLinkedHashSet(); |
| unfiltered.add("yyy"); |
| Collections.addAll(unfiltered, elements); |
| unfiltered.add("zzz"); |
| return Sets.filter(unfiltered, Collections2Test.NOT_YYY_ZZZ); |
| } |
| }) |
| .named("Sets.filter") |
| .withFeatures( |
| CollectionFeature.SUPPORTS_ADD, |
| CollectionFeature.SUPPORTS_REMOVE, |
| CollectionFeature.ALLOWS_NULL_VALUES, |
| CollectionFeature.KNOWN_ORDER, |
| CollectionSize.ANY) |
| .suppressing(getIteratorKnownOrderRemoveSupportedMethod()) |
| .createTestSuite(); |
| } |
| |
| @GwtIncompatible("suite") |
| private static Test testsForFilterNoNulls() { |
| TestSuite suite = new TestSuite(); |
| suite.addTest(SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override public Set<String> create(String[] elements) { |
| Set<String> unfiltered = Sets.newLinkedHashSet(); |
| unfiltered.add("yyy"); |
| unfiltered.addAll(ImmutableList.copyOf(elements)); |
| unfiltered.add("zzz"); |
| return Sets.filter(unfiltered, Collections2Test.LENGTH_1); |
| } |
| }) |
| .named("Sets.filter, no nulls") |
| .withFeatures(SetFeature.GENERAL_PURPOSE, CollectionFeature.KNOWN_ORDER, |
| CollectionSize.ANY, CollectionFeature.ALLOWS_NULL_QUERIES) |
| .suppressing(getIteratorKnownOrderRemoveSupportedMethod()) |
| .createTestSuite()); |
| |
| return suite; |
| } |
| |
| @GwtIncompatible("suite") |
| private static Test testsForFilterFiltered() { |
| return SetTestSuiteBuilder.using(new TestStringSetGenerator() { |
| @Override public Set<String> create(String[] elements) { |
| Set<String> unfiltered = Sets.newLinkedHashSet(); |
| unfiltered.add("yyy"); |
| unfiltered.addAll(ImmutableList.copyOf(elements)); |
| unfiltered.add("zzz"); |
| unfiltered.add("abc"); |
| return Sets.filter( |
| Sets.filter(unfiltered, Collections2Test.LENGTH_1), |
| Collections2Test.NOT_YYY_ZZZ); |
| } |
| }) |
| .named("Sets.filter, filtered input") |
| .withFeatures( |
| CollectionFeature.SUPPORTS_ADD, |
| CollectionFeature.SUPPORTS_REMOVE, |
| CollectionFeature.KNOWN_ORDER, |
| CollectionSize.ANY, |
| CollectionFeature.ALLOWS_NULL_QUERIES) |
| .suppressing(getIteratorKnownOrderRemoveSupportedMethod()) |
| .createTestSuite(); |
| } |
| |
| private enum SomeEnum { A, B, C, D } |
| |
| public void testImmutableEnumSet() { |
| Set<SomeEnum> units = Sets.immutableEnumSet(SomeEnum.D, SomeEnum.B); |
| |
| ASSERT.that(units).has().exactly(SomeEnum.B, SomeEnum.D).inOrder(); |
| try { |
| units.remove(SomeEnum.B); |
| fail("ImmutableEnumSet should throw an exception on remove()"); |
| } catch (UnsupportedOperationException expected) {} |
| try { |
| units.add(SomeEnum.C); |
| fail("ImmutableEnumSet should throw an exception on add()"); |
| } catch (UnsupportedOperationException expected) {} |
| } |
| |
| @GwtIncompatible("SerializableTester") |
| public void testImmutableEnumSet_serialized() { |
| Set<SomeEnum> units = Sets.immutableEnumSet(SomeEnum.D, SomeEnum.B); |
| |
| ASSERT.that(units).has().exactly(SomeEnum.B, SomeEnum.D).inOrder(); |
| |
| Set<SomeEnum> copy = SerializableTester.reserializeAndAssert(units); |
| assertTrue(copy instanceof ImmutableEnumSet); |
| } |
| |
| public void testImmutableEnumSet_fromIterable() { |
| ImmutableSet<SomeEnum> none |
| = Sets.immutableEnumSet(MinimalIterable.<SomeEnum>of()); |
| ASSERT.that(none).isEmpty(); |
| |
| ImmutableSet<SomeEnum> one |
| = Sets.immutableEnumSet(MinimalIterable.of(SomeEnum.B)); |
| ASSERT.that(one).has().item(SomeEnum.B); |
| |
| ImmutableSet<SomeEnum> two |
| = Sets.immutableEnumSet(MinimalIterable.of(SomeEnum.D, SomeEnum.B)); |
| ASSERT.that(two).has().exactly(SomeEnum.B, SomeEnum.D).inOrder(); |
| } |
| |
| @GwtIncompatible("java serialization not supported in GWT.") |
| public void testImmutableEnumSet_deserializationMakesDefensiveCopy() |
| throws Exception { |
| ImmutableSet<SomeEnum> original = |
| Sets.immutableEnumSet(SomeEnum.A, SomeEnum.B); |
| int handleOffset = 6; |
| byte[] serializedForm = serializeWithBackReference(original, handleOffset); |
| ObjectInputStream in = |
| new ObjectInputStream(new ByteArrayInputStream(serializedForm)); |
| |
| ImmutableSet<?> deserialized = (ImmutableSet<?>) in.readObject(); |
| EnumSet<?> delegate = (EnumSet<?>) in.readObject(); |
| |
| assertEquals(original, deserialized); |
| assertTrue(delegate.remove(SomeEnum.A)); |
| assertTrue(deserialized.contains(SomeEnum.A)); |
| } |
| |
| @GwtIncompatible("java serialization not supported in GWT.") |
| private static byte[] serializeWithBackReference( |
| Object original, int handleOffset) throws IOException { |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| ObjectOutputStream out = new ObjectOutputStream(bos); |
| |
| out.writeObject(original); |
| |
| byte[] handle = toByteArray(baseWireHandle + handleOffset); |
| byte[] ref = prepended(TC_REFERENCE, handle); |
| bos.write(ref); |
| |
| return bos.toByteArray(); |
| } |
| |
| private static byte[] prepended(byte b, byte[] array) { |
| byte[] out = new byte[array.length + 1]; |
| out[0] = b; |
| System.arraycopy(array, 0, out, 1, array.length); |
| return out; |
| } |
| |
| @GwtIncompatible("java.nio.ByteBuffer") |
| private static byte[] toByteArray(int h) { |
| return ByteBuffer.allocate(4).putInt(h).array(); |
| } |
| |
| public void testNewEnumSet_empty() { |
| EnumSet<SomeEnum> copy = |
| newEnumSet(Collections.<SomeEnum>emptySet(), SomeEnum.class); |
| assertEquals(EnumSet.noneOf(SomeEnum.class), copy); |
| } |
| |
| public void testNewEnumSet_enumSet() { |
| EnumSet<SomeEnum> set = EnumSet.of(SomeEnum.A, SomeEnum.D); |
| assertEquals(set, newEnumSet(set, SomeEnum.class)); |
| } |
| |
| public void testNewEnumSet_collection() { |
| Set<SomeEnum> set = ImmutableSet.of(SomeEnum.B, SomeEnum.C); |
| assertEquals(set, newEnumSet(set, SomeEnum.class)); |
| } |
| |
| public void testNewEnumSet_iterable() { |
| Set<SomeEnum> set = ImmutableSet.of(SomeEnum.A, SomeEnum.B, SomeEnum.C); |
| assertEquals(set, newEnumSet(unmodifiableIterable(set), SomeEnum.class)); |
| } |
| |
| public void testNewHashSetEmpty() { |
| HashSet<Integer> set = Sets.newHashSet(); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewHashSetVarArgs() { |
| HashSet<Integer> set = Sets.newHashSet(0, 1, 1); |
| verifySetContents(set, Arrays.asList(0, 1)); |
| } |
| |
| public void testNewHashSetFromCollection() { |
| HashSet<Integer> set = Sets.newHashSet(SOME_COLLECTION); |
| verifySetContents(set, SOME_COLLECTION); |
| } |
| |
| public void testNewHashSetFromIterable() { |
| HashSet<Integer> set = Sets.newHashSet(SOME_ITERABLE); |
| verifySetContents(set, SOME_ITERABLE); |
| } |
| |
| public void testNewHashSetWithExpectedSizeSmall() { |
| HashSet<Integer> set = Sets.newHashSetWithExpectedSize(0); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewHashSetWithExpectedSizeLarge() { |
| HashSet<Integer> set = Sets.newHashSetWithExpectedSize(1000); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewHashSetFromIterator() { |
| HashSet<Integer> set = Sets.newHashSet(SOME_COLLECTION.iterator()); |
| verifySetContents(set, SOME_COLLECTION); |
| } |
| |
| public void testNewConcurrentHashSetEmpty() { |
| Set<Integer> set = Sets.newConcurrentHashSet(); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewConcurrentHashSetFromCollection() { |
| Set<Integer> set = Sets.newConcurrentHashSet(SOME_COLLECTION); |
| verifySetContents(set, SOME_COLLECTION); |
| } |
| |
| public void testNewLinkedHashSetEmpty() { |
| LinkedHashSet<Integer> set = Sets.newLinkedHashSet(); |
| verifyLinkedHashSetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewLinkedHashSetFromCollection() { |
| LinkedHashSet<Integer> set = Sets.newLinkedHashSet(LONGER_LIST); |
| verifyLinkedHashSetContents(set, LONGER_LIST); |
| } |
| |
| public void testNewLinkedHashSetFromIterable() { |
| LinkedHashSet<Integer> set = Sets.newLinkedHashSet(new Iterable<Integer>() |
| { |
| @Override |
| public Iterator<Integer> iterator() { |
| return LONGER_LIST.iterator(); |
| } |
| }); |
| verifyLinkedHashSetContents(set, LONGER_LIST); |
| } |
| |
| public void testNewLinkedHashSetWithExpectedSizeSmall() { |
| LinkedHashSet<Integer> set = Sets.newLinkedHashSetWithExpectedSize(0); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewLinkedHashSetWithExpectedSizeLarge() { |
| LinkedHashSet<Integer> set = Sets.newLinkedHashSetWithExpectedSize(1000); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| public void testNewTreeSetEmpty() { |
| TreeSet<Integer> set = Sets.newTreeSet(); |
| verifySortedSetContents(set, EMPTY_COLLECTION, null); |
| } |
| |
| public void testNewTreeSetEmptyDerived() { |
| TreeSet<Derived> set = Sets.newTreeSet(); |
| assertTrue(set.isEmpty()); |
| set.add(new Derived("foo")); |
| set.add(new Derived("bar")); |
| ASSERT.that(set).has().exactly(new Derived("bar"), new Derived("foo")).inOrder(); |
| } |
| |
| public void testNewTreeSetEmptyNonGeneric() { |
| TreeSet<LegacyComparable> set = Sets.newTreeSet(); |
| assertTrue(set.isEmpty()); |
| set.add(new LegacyComparable("foo")); |
| set.add(new LegacyComparable("bar")); |
| ASSERT.that(set).has() |
| .exactly(new LegacyComparable("bar"), new LegacyComparable("foo")).inOrder(); |
| } |
| |
| public void testNewTreeSetFromCollection() { |
| TreeSet<Integer> set = Sets.newTreeSet(SOME_COLLECTION); |
| verifySortedSetContents(set, SOME_COLLECTION, null); |
| } |
| |
| public void testNewTreeSetFromIterable() { |
| TreeSet<Integer> set = Sets.newTreeSet(SOME_ITERABLE); |
| verifySortedSetContents(set, SOME_ITERABLE, null); |
| } |
| |
| public void testNewTreeSetFromIterableDerived() { |
| Iterable<Derived> iterable = |
| Arrays.asList(new Derived("foo"), new Derived("bar")); |
| TreeSet<Derived> set = Sets.newTreeSet(iterable); |
| ASSERT.that(set).has().exactly( |
| new Derived("bar"), new Derived("foo")).inOrder(); |
| } |
| |
| public void testNewTreeSetFromIterableNonGeneric() { |
| Iterable<LegacyComparable> iterable = |
| Arrays.asList(new LegacyComparable("foo"), new LegacyComparable("bar")); |
| TreeSet<LegacyComparable> set = Sets.newTreeSet(iterable); |
| ASSERT.that(set).has().exactly( |
| new LegacyComparable("bar"), new LegacyComparable("foo")).inOrder(); |
| } |
| |
| public void testNewTreeSetEmptyWithComparator() { |
| TreeSet<Integer> set = Sets.newTreeSet(SOME_COMPARATOR); |
| verifySortedSetContents(set, EMPTY_COLLECTION, SOME_COMPARATOR); |
| } |
| |
| public void testNewIdentityHashSet() { |
| Set<Integer> set = Sets.newIdentityHashSet(); |
| Integer value1 = new Integer(12357); |
| Integer value2 = new Integer(12357); |
| assertTrue(set.add(value1)); |
| assertFalse(set.contains(value2)); |
| assertTrue(set.contains(value1)); |
| assertTrue(set.add(value2)); |
| assertEquals(2, set.size()); |
| } |
| |
| @GwtIncompatible("CopyOnWriteArraySet") |
| public void testNewCOWASEmpty() { |
| CopyOnWriteArraySet<Integer> set = Sets.newCopyOnWriteArraySet(); |
| verifySetContents(set, EMPTY_COLLECTION); |
| } |
| |
| @GwtIncompatible("CopyOnWriteArraySet") |
| public void testNewCOWASFromIterable() { |
| CopyOnWriteArraySet<Integer> set = Sets.newCopyOnWriteArraySet(SOME_ITERABLE); |
| verifySetContents(set, SOME_COLLECTION); |
| } |
| |
| public void testComplementOfEnumSet() { |
| Set<SomeEnum> units = EnumSet.of(SomeEnum.B, SomeEnum.D); |
| EnumSet<SomeEnum> otherUnits = Sets.complementOf(units); |
| verifySetContents(otherUnits, EnumSet.of(SomeEnum.A, SomeEnum.C)); |
| } |
| |
| public void testComplementOfEnumSetWithType() { |
| Set<SomeEnum> units = EnumSet.of(SomeEnum.B, SomeEnum.D); |
| EnumSet<SomeEnum> otherUnits = Sets.complementOf(units, SomeEnum.class); |
| verifySetContents(otherUnits, EnumSet.of(SomeEnum.A, SomeEnum.C)); |
| } |
| |
| public void testComplementOfRegularSet() { |
| Set<SomeEnum> units = Sets.newHashSet(SomeEnum.B, SomeEnum.D); |
| EnumSet<SomeEnum> otherUnits = Sets.complementOf(units); |
| verifySetContents(otherUnits, EnumSet.of(SomeEnum.A, SomeEnum.C)); |
| } |
| |
| public void testComplementOfRegularSetWithType() { |
| Set<SomeEnum> units = Sets.newHashSet(SomeEnum.B, SomeEnum.D); |
| EnumSet<SomeEnum> otherUnits = Sets.complementOf(units, SomeEnum.class); |
| verifySetContents(otherUnits, EnumSet.of(SomeEnum.A, SomeEnum.C)); |
| } |
| |
| public void testComplementOfEmptySet() { |
| Set<SomeEnum> noUnits = Collections.emptySet(); |
| EnumSet<SomeEnum> allUnits = Sets.complementOf(noUnits, SomeEnum.class); |
| verifySetContents(EnumSet.allOf(SomeEnum.class), allUnits); |
| } |
| |
| public void testComplementOfFullSet() { |
| Set<SomeEnum> allUnits = Sets.newHashSet(SomeEnum.values()); |
| EnumSet<SomeEnum> noUnits = Sets.complementOf(allUnits, SomeEnum.class); |
| verifySetContents(noUnits, EnumSet.noneOf(SomeEnum.class)); |
| } |
| |
| public void testComplementOfEmptyEnumSetWithoutType() { |
| Set<SomeEnum> noUnits = EnumSet.noneOf(SomeEnum.class); |
| EnumSet<SomeEnum> allUnits = Sets.complementOf(noUnits); |
| verifySetContents(allUnits, EnumSet.allOf(SomeEnum.class)); |
| } |
| |
| public void testComplementOfEmptySetWithoutTypeDoesntWork() { |
| Set<SomeEnum> set = Collections.emptySet(); |
| try { |
| Sets.complementOf(set); |
| fail(); |
| } catch (IllegalArgumentException expected) {} |
| } |
| |
| @GwtIncompatible("NullPointerTester") |
| public void testNullPointerExceptions() { |
| new NullPointerTester() |
| .setDefault(Enum.class, SomeEnum.A) |
| .setDefault(Class.class, SomeEnum.class) // for newEnumSet |
| .testAllPublicStaticMethods(Sets.class); |
| } |
| |
| public void testNewSetFromMap() { |
| Set<Integer> set = Sets.newSetFromMap(new HashMap<Integer, Boolean>()); |
| set.addAll(SOME_COLLECTION); |
| verifySetContents(set, SOME_COLLECTION); |
| } |
| |
| @GwtIncompatible("SerializableTester") |
| public void testNewSetFromMapSerialization() { |
| Set<Integer> set = |
| Sets.newSetFromMap(new LinkedHashMap<Integer, Boolean>()); |
| set.addAll(SOME_COLLECTION); |
| Set<Integer> copy = SerializableTester.reserializeAndAssert(set); |
| ASSERT.that(copy).has().exactly(0, 1).inOrder(); |
| } |
| |
| public void testNewSetFromMapIllegal() { |
| Map<Integer, Boolean> map = new LinkedHashMap<Integer, Boolean>(); |
| map.put(2, true); |
| try { |
| Sets.newSetFromMap(map); |
| fail(); |
| } catch (IllegalArgumentException expected) {} |
| } |
| |
| // TODO: the overwhelming number of suppressions below suggests that maybe |
| // it's not worth having a varargs form of this method at all... |
| |
| /** |
| * The 0-ary cartesian product is a single empty list. |
| */ |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_zeroary() { |
| ASSERT.that(Sets.cartesianProduct()).has().exactly(list()); |
| } |
| |
| /** |
| * A unary cartesian product is one list of size 1 for each element in the |
| * input set. |
| */ |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_unary() { |
| ASSERT.that(Sets.cartesianProduct(set(1, 2))).has().exactly(list(1), list(2)); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary0x0() { |
| Set<Integer> mt = emptySet(); |
| assertEmpty(Sets.cartesianProduct(mt, mt)); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary0x1() { |
| Set<Integer> mt = emptySet(); |
| assertEmpty(Sets.cartesianProduct(mt, set(1))); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary1x0() { |
| Set<Integer> mt = emptySet(); |
| assertEmpty(Sets.cartesianProduct(set(1), mt)); |
| } |
| |
| private static void assertEmpty(Set<? extends List<?>> set) { |
| assertTrue(set.isEmpty()); |
| assertEquals(0, set.size()); |
| assertFalse(set.iterator().hasNext()); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary1x1() { |
| ASSERT.that(Sets.cartesianProduct(set(1), set(2))).has().item(list(1, 2)); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary1x2() { |
| ASSERT.that(Sets.cartesianProduct(set(1), set(2, 3))) |
| .has().exactly(list(1, 2), list(1, 3)).inOrder(); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_binary2x2() { |
| ASSERT.that(Sets.cartesianProduct(set(1, 2), set(3, 4))) |
| .has().exactly(list(1, 3), list(1, 4), list(2, 3), list(2, 4)).inOrder(); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_2x2x2() { |
| ASSERT.that(Sets.cartesianProduct(set(0, 1), set(0, 1), set(0, 1))).has().exactly( |
| list(0, 0, 0), list(0, 0, 1), list(0, 1, 0), list(0, 1, 1), |
| list(1, 0, 0), list(1, 0, 1), list(1, 1, 0), list(1, 1, 1)).inOrder(); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_contains() { |
| Set<List<Integer>> actual = Sets.cartesianProduct(set(1, 2), set(3, 4)); |
| assertTrue(actual.contains(list(1, 3))); |
| assertTrue(actual.contains(list(1, 4))); |
| assertTrue(actual.contains(list(2, 3))); |
| assertTrue(actual.contains(list(2, 4))); |
| assertFalse(actual.contains(list(3, 1))); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_unrelatedTypes() { |
| Set<Integer> x = set(1, 2); |
| Set<String> y = set("3", "4"); |
| |
| List<Object> exp1 = list((Object) 1, "3"); |
| List<Object> exp2 = list((Object) 1, "4"); |
| List<Object> exp3 = list((Object) 2, "3"); |
| List<Object> exp4 = list((Object) 2, "4"); |
| |
| ASSERT.that(Sets.<Object>cartesianProduct(x, y)) |
| .has().exactly(exp1, exp2, exp3, exp4).inOrder(); |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProductTooBig() { |
| Set<Integer> set = ContiguousSet.create(Range.closed(0, 10000), DiscreteDomain.integers()); |
| try { |
| Sets.cartesianProduct(set, set, set, set, set); |
| fail("Expected IAE"); |
| } catch (IllegalArgumentException expected) {} |
| } |
| |
| @SuppressWarnings("unchecked") // varargs! |
| public void testCartesianProduct_hashCode() { |
| // Run through the same cartesian products we tested above |
| |
| Set<List<Integer>> degenerate = Sets.cartesianProduct(); |
| checkHashCode(degenerate); |
| |
| checkHashCode(Sets.cartesianProduct(set(1, 2))); |
| |
| int num = Integer.MAX_VALUE / 3 * 2; // tickle overflow-related problems |
| checkHashCode(Sets.cartesianProduct(set(1, 2, num))); |
| |
| Set<Integer> mt = emptySet(); |
| checkHashCode(Sets.cartesianProduct(mt, mt)); |
| checkHashCode(Sets.cartesianProduct(mt, set(num))); |
| checkHashCode(Sets.cartesianProduct(set(num), mt)); |
| checkHashCode(Sets.cartesianProduct(set(num), set(1))); |
| checkHashCode(Sets.cartesianProduct(set(1), set(2, num))); |
| checkHashCode(Sets.cartesianProduct(set(1, num), set(2, num - 1))); |
| checkHashCode(Sets.cartesianProduct( |
| set(1, num), set(2, num - 1), set(3, num + 1))); |
| |
| // a bigger one |
| checkHashCode(Sets.cartesianProduct( |
| set(1, num, num + 1), set(2), set(3, num + 2), set(4, 5, 6, 7, 8))); |
| } |
| |
| public void testPowerSetEmpty() { |
| ImmutableSet<Integer> elements = ImmutableSet.of(); |
| Set<Set<Integer>> powerSet = powerSet(elements); |
| assertEquals(1, powerSet.size()); |
| assertEquals(ImmutableSet.of(ImmutableSet.of()), powerSet); |
| assertEquals(0, powerSet.hashCode()); |
| } |
| |
| public void testPowerSetContents() { |
| ImmutableSet<Integer> elements = ImmutableSet.of(1, 2, 3); |
| Set<Set<Integer>> powerSet = powerSet(elements); |
| assertEquals(8, powerSet.size()); |
| assertEquals(4 * 1 + 4 * 2 + 4 * 3, powerSet.hashCode()); |
| |
| Set<Set<Integer>> expected = newHashSet(); |
| expected.add(ImmutableSet.<Integer>of()); |
| expected.add(ImmutableSet.of(1)); |
| expected.add(ImmutableSet.of(2)); |
| expected.add(ImmutableSet.of(3)); |
| expected.add(ImmutableSet.of(1, 2)); |
| expected.add(ImmutableSet.of(1, 3)); |
| expected.add(ImmutableSet.of(2, 3)); |
| expected.add(ImmutableSet.of(1, 2, 3)); |
| |
| Set<Set<Integer>> almostPowerSet = newHashSet(expected); |
| almostPowerSet.remove(ImmutableSet.of(1, 2, 3)); |
| almostPowerSet.add(ImmutableSet.of(1, 2, 4)); |
| |
| new EqualsTester() |
| .addEqualityGroup(expected, powerSet) |
| .addEqualityGroup(ImmutableSet.of(1, 2, 3)) |
| .addEqualityGroup(almostPowerSet) |
| .testEquals(); |
| |
| for (Set<Integer> subset : expected) { |
| assertTrue(powerSet.contains(subset)); |
| } |
| assertFalse(powerSet.contains(ImmutableSet.of(1, 2, 4))); |
| assertFalse(powerSet.contains(singleton(null))); |
| assertFalse(powerSet.contains(null)); |
| assertFalse(powerSet.contains("notASet")); |
| } |
| |
| public void testPowerSetIteration_manual() { |
| ImmutableSet<Integer> elements = ImmutableSet.of(1, 2, 3); |
| Set<Set<Integer>> powerSet = powerSet(elements); |
| // The API doesn't promise this iteration order, but it's convenient here. |
| Iterator<Set<Integer>> i = powerSet.iterator(); |
| assertEquals(ImmutableSet.of(), i.next()); |
| assertEquals(ImmutableSet.of(1), i.next()); |
| assertEquals(ImmutableSet.of(2), i.next()); |
| assertEquals(ImmutableSet.of(2, 1), i.next()); |
| assertEquals(ImmutableSet.of(3), i.next()); |
| assertEquals(ImmutableSet.of(3, 1), i.next()); |
| assertEquals(ImmutableSet.of(3, 2), i.next()); |
| assertEquals(ImmutableSet.of(3, 2, 1), i.next()); |
| assertFalse(i.hasNext()); |
| try { |
| i.next(); |
| fail(); |
| } catch (NoSuchElementException expected) { |
| } |
| } |
| |
| @GwtIncompatible("too slow for GWT") |
| public void testPowerSetIteration_iteratorTester() { |
| ImmutableSet<Integer> elements = ImmutableSet.of(1, 2); |
| |
| Set<Set<Integer>> expected = newLinkedHashSet(); |
| expected.add(ImmutableSet.<Integer>of()); |
| expected.add(ImmutableSet.of(1)); |
| expected.add(ImmutableSet.of(2)); |
| expected.add(ImmutableSet.of(1, 2)); |
| |
| final Set<Set<Integer>> powerSet = powerSet(elements); |
| new IteratorTester<Set<Integer>>(6, UNMODIFIABLE, expected, KNOWN_ORDER) { |
| @Override protected Iterator<Set<Integer>> newTargetIterator() { |
| return powerSet.iterator(); |
| } |
| }.test(); |
| } |
| |
| public void testPowerSetIteration_iteratorTester_fast() { |
| ImmutableSet<Integer> elements = ImmutableSet.of(1, 2); |
| |
| Set<Set<Integer>> expected = newLinkedHashSet(); |
| expected.add(ImmutableSet.<Integer>of()); |
| expected.add(ImmutableSet.of(1)); |
| expected.add(ImmutableSet.of(2)); |
| expected.add(ImmutableSet.of(1, 2)); |
| |
| final Set<Set<Integer>> powerSet = powerSet(elements); |
| new IteratorTester<Set<Integer>>(4, UNMODIFIABLE, expected, KNOWN_ORDER) { |
| @Override protected Iterator<Set<Integer>> newTargetIterator() { |
| return powerSet.iterator(); |
| } |
| }.test(); |
| } |
| |
| public void testPowerSetSize() { |
| assertPowerSetSize(1); |
| assertPowerSetSize(2, 'a'); |
| assertPowerSetSize(4, 'a', 'b'); |
| assertPowerSetSize(8, 'a', 'b', 'c'); |
| assertPowerSetSize(16, 'a', 'b', 'd', 'e'); |
| assertPowerSetSize(1 << 30, |
| 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', |
| 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '1', '2', |
| '3', '4'); |
| } |
| |
| public void testPowerSetCreationErrors() { |
| try { |
| powerSet(newHashSet('a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', |
| 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', |
| 'y', 'z', '1', '2', '3', '4', '5')); |
| fail(); |
| } catch (IllegalArgumentException expected) { |
| } |
| |
| try { |
| powerSet(singleton(null)); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| } |
| |
| public void testPowerSetEqualsAndHashCode_verifyAgainstHashSet() { |
| ImmutableList<Integer> allElements = ImmutableList.of(4233352, 3284593, |
| 3794208, 3849533, 4013967, 2902658, 1886275, 2131109, 985872, 1843868); |
| for (int i = 0; i < allElements.size(); i++) { |
| Set<Integer> elements = newHashSet(allElements.subList(0, i)); |
| Set<Set<Integer>> powerSet1 = powerSet(elements); |
| Set<Set<Integer>> powerSet2 = powerSet(elements); |
| new EqualsTester() |
| .addEqualityGroup(powerSet1, powerSet2, toHashSets(powerSet1)) |
| .addEqualityGroup(ImmutableSet.of()) |
| .addEqualityGroup(ImmutableSet.of(9999999)) |
| .addEqualityGroup("notASet") |
| .testEquals(); |
| assertEquals(toHashSets(powerSet1).hashCode(), powerSet1.hashCode()); |
| } |
| } |
| |
| /** |
| * Test that a hash code miscomputed by "input.hashCode() * tooFarValue / 2" |
| * is correct under our {@code hashCode} implementation. |
| */ |
| public void testPowerSetHashCode_inputHashCodeTimesTooFarValueIsZero() { |
| Set<Object> sumToEighthMaxIntElements = |
| newHashSet(objectWithHashCode(1 << 29), objectWithHashCode(0)); |
| assertPowerSetHashCode(1 << 30, sumToEighthMaxIntElements); |
| |
| Set<Object> sumToQuarterMaxIntElements = |
| newHashSet(objectWithHashCode(1 << 30), objectWithHashCode(0)); |
| assertPowerSetHashCode(1 << 31, sumToQuarterMaxIntElements); |
| } |
| |
| public void testPowerSetShowOff() { |
| Set<Object> zero = ImmutableSet.of(); |
| Set<Set<Object>> one = powerSet(zero); |
| Set<Set<Set<Object>>> two = powerSet(one); |
| Set<Set<Set<Set<Object>>>> four = powerSet(two); |
| Set<Set<Set<Set<Set<Object>>>>> sixteen = powerSet(four); |
| Set<Set<Set<Set<Set<Set<Object>>>>>> sixtyFiveThousandish = |
| powerSet(sixteen); |
| assertEquals(1 << 16, sixtyFiveThousandish.size()); |
| |
| assertTrue(powerSet(makeSetOfZeroToTwentyNine()) |
| .contains(makeSetOfZeroToTwentyNine())); |
| assertFalse(powerSet(makeSetOfZeroToTwentyNine()) |
| .contains(ImmutableSet.of(30))); |
| } |
| |
| private static Set<Integer> makeSetOfZeroToTwentyNine() { |
| // TODO: use Range once it's publicly available |
| Set<Integer> zeroToTwentyNine = newHashSet(); |
| for (int i = 0; i < 30; i++) { |
| zeroToTwentyNine.add(i); |
| } |
| return zeroToTwentyNine; |
| } |
| |
| private static <E> Set<Set<E>> toHashSets(Set<Set<E>> powerSet) { |
| Set<Set<E>> result = newHashSet(); |
| for (Set<E> subset : powerSet) { |
| result.add(new HashSet<E>(subset)); |
| } |
| return result; |
| } |
| |
| private static Object objectWithHashCode(final int hashCode) { |
| return new Object() { |
| @Override public int hashCode() { |
| return hashCode; |
| } |
| }; |
| } |
| |
| private static void assertPowerSetHashCode(int expected, Set<?> elements) { |
| assertEquals(expected, powerSet(elements).hashCode()); |
| } |
| |
| private static void assertPowerSetSize(int i, Object... elements) { |
| assertEquals(i, powerSet(newHashSet(elements)).size()); |
| } |
| |
| private static void checkHashCode(Set<?> set) { |
| assertEquals(Sets.newHashSet(set).hashCode(), set.hashCode()); |
| } |
| |
| private static <E> Set<E> set(E... elements) { |
| return ImmutableSet.copyOf(elements); |
| } |
| |
| private static <E> List<E> list(E... elements) { |
| return ImmutableList.copyOf(elements); |
| } |
| |
| /** |
| * Utility method to verify that the given LinkedHashSet is equal to and |
| * hashes identically to a set constructed with the elements in the given |
| * collection. Also verifies that the ordering in the set is the same |
| * as the ordering of the given contents. |
| */ |
| private static <E> void verifyLinkedHashSetContents( |
| LinkedHashSet<E> set, Collection<E> contents) { |
| assertEquals("LinkedHashSet should have preserved order for iteration", |
| new ArrayList<E>(set), new ArrayList<E>(contents)); |
| verifySetContents(set, contents); |
| } |
| |
| /** |
| * Utility method to verify that the given SortedSet is equal to and |
| * hashes identically to a set constructed with the elements in the |
| * given iterable. Also verifies that the comparator is the same as the |
| * given comparator. |
| */ |
| private static <E> void verifySortedSetContents( |
| SortedSet<E> set, Iterable<E> iterable, |
| @Nullable Comparator<E> comparator) { |
| assertSame(comparator, set.comparator()); |
| verifySetContents(set, iterable); |
| } |
| |
| /** |
| * Utility method that verifies that the given set is equal to and hashes |
| * identically to a set constructed with the elements in the given iterable. |
| */ |
| private static <E> void verifySetContents(Set<E> set, Iterable<E> contents) { |
| Set<E> expected = null; |
| if (contents instanceof Set) { |
| expected = (Set<E>) contents; |
| } else { |
| expected = new HashSet<E>(); |
| for (E element : contents) { |
| expected.add(element); |
| } |
| } |
| assertEquals(expected, set); |
| } |
| |
| /** |
| * Simple base class to verify that we handle generics correctly. |
| */ |
| static class Base implements Comparable<Base>, Serializable { |
| private final String s; |
| |
| public Base(String s) { |
| this.s = s; |
| } |
| |
| @Override public int hashCode() { // delegate to 's' |
| return s.hashCode(); |
| } |
| |
| @Override public boolean equals(Object other) { |
| if (other == null) { |
| return false; |
| } else if (other instanceof Base) { |
| return s.equals(((Base) other).s); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public int compareTo(Base o) { |
| return s.compareTo(o.s); |
| } |
| |
| private static final long serialVersionUID = 0; |
| } |
| |
| /** |
| * Simple derived class to verify that we handle generics correctly. |
| */ |
| static class Derived extends Base { |
| public Derived(String s) { |
| super(s); |
| } |
| |
| private static final long serialVersionUID = 0; |
| } |
| |
| void ensureNotDirectlyModifiable(SortedSet<Integer> unmod) { |
| try { |
| unmod.add(4); |
| fail("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| try { |
| unmod.remove(4); |
| fail("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| try { |
| unmod.addAll(Collections.singleton(4)); |
| fail("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| try { |
| Iterator<Integer> iterator = unmod.iterator(); |
| iterator.next(); |
| iterator.remove(); |
| fail("UnsupportedOperationException expected"); |
| } catch (UnsupportedOperationException expected) { |
| } |
| } |
| } |
