@Test
public void collectDoubleWithTarget() {
DoubleHashBag target = new DoubleHashBag();
DoubleHashBag result = this.newBag().collectDouble(Double::parseDouble, target);
Assert.assertSame("Target sent as parameter not returned", target, result);
Assert.assertEquals(this.numKeys(), result.sizeDistinct());
for (int i = 1; i <= this.numKeys(); i++) {
Assert.assertEquals(i, result.occurrencesOf(i));
}
}
@Override
@Test
public void collectDouble() {
MutableBag<Integer> integers = UnmodifiableBag.of(HashBag.newBagWith(1, 2, 2, 3, 3, 3));
Assert.assertEquals(
DoubleHashBag.newBagWith(1.0d, 2.0d, 2.0d, 3.0d, 3.0d, 3.0d),
integers.collectDouble(PrimitiveFunctions.unboxIntegerToDouble()));
}