@Test
public void partition() {
ImmutableCollection<Integer> integers = this.classUnderTest();
PartitionImmutableCollection<Integer> partition = integers.partition(IntegerPredicates.isOdd());
Assert.assertEquals(integers.select(IntegerPredicates.isOdd()), partition.getSelected());
Assert.assertEquals(integers.select(IntegerPredicates.isEven()), partition.getRejected());
}
@Test
public void select_value() {
MutableMap<String, Integer> map = this.newMapWithKeysValues("1", 1, "2", 2, "3", 3);
ImmutableSet<Integer> expected = this.expectSelect(map.size());
Assert.assertEquals(expected, map.select(IntegerPredicates.isEven()).toSet());
Assert.assertEquals(
expected, map.select(IntegerPredicates.isEven(), UnifiedSet.<Integer>newSet()));
}
@Test
public void reject_value() {
ImmutableMap<String, Integer> map = this.newMapWithKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
MutableSet<Integer> rejected = map.reject(IntegerPredicates.isEven()).toSet();
UnifiedSet<Integer> rejectedIntoTarget =
map.reject(IntegerPredicates.isEven(), UnifiedSet.<Integer>newSet());
ImmutableSet<Integer> expected = this.expectReject(map.size());
Assert.assertEquals(expected, rejected);
Assert.assertEquals(expected, rejectedIntoTarget);
}
private void groupByAssertions(ImmutableBagMultimap<Boolean, String> multimap) {
Verify.assertIterableEmpty(multimap.get(null));
ImmutableBag<String> odds = multimap.get(true);
ImmutableBag<String> evens = multimap.get(false);
for (int i = 1; i <= this.numKeys(); i++) {
String key = String.valueOf(i);
ImmutableBag<String> containingBag = IntegerPredicates.isOdd().accept(i) ? odds : evens;
ImmutableBag<String> nonContainingBag = IntegerPredicates.isOdd().accept(i) ? evens : odds;
Assert.assertTrue(containingBag.contains(key));
Assert.assertFalse(nonContainingBag.contains(key));
Assert.assertEquals(i, containingBag.occurrencesOf(key));
}
}
@Test
public void rejectWith() {
ImmutableCollection<Integer> integers = this.classUnderTest();
Assert.assertEquals(
this.<Integer>newMutable().withAll(integers).reject(IntegerPredicates.isOdd()),
integers.rejectWith(Predicates2.in(), iList(1, 3, 5, 7, 9)));
}
@Test
public void groupBy() {
ImmutableBagMultimap<Boolean, String> multimap =
this.newBag().groupBy(string -> IntegerPredicates.isOdd().accept(Integer.valueOf(string)));
this.groupByAssertions(multimap);
}
@Test
public void partition_value() {
MutableMap<String, Integer> map = this.newMapWithKeysValues("1", 1, "2", 2, "3", 3);
PartitionMutableCollection<Integer> partition = map.partition(IntegerPredicates.isEven());
Assert.assertEquals(this.expectSelect(map.size()), partition.getSelected().toSet());
Assert.assertEquals(this.expectReject(map.size()), partition.getRejected().toSet());
}
@Test
public void groupBy_with_target() {
ImmutableBagMultimap<Boolean, String> multimap =
this.newBag()
.groupBy(
string -> IntegerPredicates.isOdd().accept(Integer.valueOf(string)),
new HashBagMultimap<Boolean, String>())
.toImmutable();
this.groupByAssertions(multimap);
}
@Test
public void groupBy() {
ImmutableMap<String, Integer> map = this.newMapWithKeysValues("1", 1, "2", 2, "3", 3, "4", 4);
Function<Integer, Boolean> isOddFunction = object -> IntegerPredicates.isOdd().accept(object);
Multimap<Boolean, Integer> expected;
switch (map.size()) {
case 1:
expected = FastListMultimap.newMultimap(Tuples.pair(Boolean.TRUE, 1));
break;
case 2:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1), Tuples.pair(Boolean.FALSE, 2));
break;
case 3:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1),
Tuples.pair(Boolean.TRUE, 3),
Tuples.pair(Boolean.FALSE, 2));
break;
case 4:
expected =
FastListMultimap.newMultimap(
Tuples.pair(Boolean.TRUE, 1),
Tuples.pair(Boolean.TRUE, 3),
Tuples.pair(Boolean.FALSE, 2),
Tuples.pair(Boolean.FALSE, 4));
break;
default:
expected = FastListMultimap.newMultimap();
break;
}
Multimap<Boolean, Integer> actual = map.groupBy(isOddFunction);
Assert.assertEquals(HashBagMultimap.newMultimap(expected), HashBagMultimap.newMultimap(actual));
Multimap<Boolean, Integer> actualFromTarget =
map.groupBy(isOddFunction, FastListMultimap.<Boolean, Integer>newMultimap());
Assert.assertEquals(
HashBagMultimap.newMultimap(expected), HashBagMultimap.newMultimap(actualFromTarget));
}
@Test
public void remove_with_hashingStrategy() {
HashingStrategy<Integer> hashingStrategy =
HashingStrategies.nullSafeHashingStrategy(
new HashingStrategy<Integer>() {
public int computeHashCode(Integer object) {
return object % 1000;
}
public boolean equals(Integer object1, Integer object2) {
return object1.equals(object2);
}
});
UnifiedSetWithHashingStrategy<Integer> integers =
UnifiedSetWithHashingStrategy.newSet(hashingStrategy, 2)
.with(COLLISION_1, COLLISION_1 + 1000, COLLISION_1 + 2000, null);
// Testing remove null from the end of the chain
Assert.assertTrue(integers.remove(null));
// Adding null back and creating a deep chain.
integers.with(null, COLLISION_1 + 3000, COLLISION_1 + 4000, COLLISION_1 + 5000);
// Removing null from the first position of a bucket in the deep chain
Assert.assertTrue(integers.remove(null));
Assert.assertFalse(integers.remove(null));
// Removing from the end of the deep chain
Assert.assertTrue(integers.remove(COLLISION_1 + 4000));
// Removing from the first spot of the chain
Assert.assertTrue(integers.remove(COLLISION_1));
Verify.assertSize(4, integers);
// Testing removing a non existent element from a non bucket slot
integers.add(2);
integers.add(4);
Assert.assertFalse(integers.remove(1002));
// Testing removeIf
integers.removeIf(IntegerPredicates.isEven());
Verify.assertEmpty(integers);
}
@Test
public void selectByOccurrences() {
ImmutableBag<String> strings = this.newBag().selectByOccurrences(IntPredicates.isEven());
ImmutableBag<Integer> collect = strings.collect(Integer::valueOf);
Verify.assertAllSatisfy(collect, IntegerPredicates.isEven());
}
@Test
public void partition() {
PartitionIterable<Integer> partition = this.lazyIterable.partition(IntegerPredicates.isEven());
Assert.assertEquals(iList(2, 4, 6), partition.getSelected());
Assert.assertEquals(iList(1, 3, 5, 7), partition.getRejected());
}
