@Test
public void testMinIndex() {
List<Integer> ints = IntStreamEx.of(new Random(1), 1000, 5, 47).boxed().toList();
long expectedMin = IntStreamEx.ofIndices(ints).minBy(ints::get).getAsInt();
long expectedMax = IntStreamEx.ofIndices(ints).maxBy(ints::get).getAsInt();
long expectedMinString =
IntStreamEx.ofIndices(ints).minBy(i -> String.valueOf(ints.get(i))).getAsInt();
long expectedMaxString =
IntStreamEx.ofIndices(ints).maxBy(i -> String.valueOf(ints.get(i))).getAsInt();
Comparator<Integer> cmp = Comparator.comparing(String::valueOf);
checkCollector(
"minIndex", OptionalLong.of(expectedMin), ints::stream, MoreCollectors.minIndex());
checkCollector(
"maxIndex", OptionalLong.of(expectedMax), ints::stream, MoreCollectors.maxIndex());
checkCollector(
"minIndex", OptionalLong.of(expectedMinString), ints::stream, MoreCollectors.minIndex(cmp));
checkCollector(
"maxIndex", OptionalLong.of(expectedMaxString), ints::stream, MoreCollectors.maxIndex(cmp));
Supplier<Stream<String>> supplier = () -> ints.stream().map(Object::toString);
checkCollector(
"minIndex", OptionalLong.of(expectedMinString), supplier, MoreCollectors.minIndex());
checkCollector(
"maxIndex", OptionalLong.of(expectedMaxString), supplier, MoreCollectors.maxIndex());
checkCollectorEmpty("minIndex", OptionalLong.empty(), MoreCollectors.<String>minIndex());
checkCollectorEmpty("maxIndex", OptionalLong.empty(), MoreCollectors.<String>maxIndex());
}
