Examples with OptionalInt java8.util.OptionalInt used on opensource projects

Example 1 with OptionalInt

use of java8.util.OptionalInt in project streamsupport by stefan-zobel.

the class FindAnyOpTest method exerciseIntStream.

void exerciseIntStream(TestData.OfInt data, Function<IntStream, IntStream> fs) {
    OptionalInt or = withData(data).terminal(fs, s -> s.findAny()).equalator(INT_VALID_ANSWER).exercise();
    if (or.isPresent()) {
        int r = or.getAsInt();
        PrimitiveIterator.OfInt it = fs.apply(data.stream()).iterator();
        boolean contained = false;
        while (!contained && it.hasNext()) {
            contained = r == it.nextInt();
        }
        assertTrue(contained);
    } else {
        assertFalse(fs.apply(data.stream()).iterator().hasNext());
    }
}

Example 2 with OptionalInt

use of java8.util.OptionalInt in project streamsupport by stefan-zobel.

the class IntReduceTest method testOps.

@Test(dataProvider = "IntStreamTestData", dataProviderClass = IntStreamTestDataProvider.class)
public void testOps(String name, TestData.OfInt data) {
    assertEquals(0, (int) exerciseTerminalOps(data, (IntStream s) -> s.filter(ipFalse), s -> s.reduce(0, irPlus)));
    OptionalInt seedless = exerciseTerminalOps(data, s -> s.reduce(irPlus));
    int folded = exerciseTerminalOps(data, s -> s.reduce(0, irPlus));
    assertEquals(folded, seedless.orElse(0));
    seedless = exerciseTerminalOps(data, s -> s.reduce(irMin));
    folded = exerciseTerminalOps(data, s -> s.reduce(Integer.MAX_VALUE, irMin));
    assertEquals(folded, seedless.orElse(Integer.MAX_VALUE));
    seedless = exerciseTerminalOps(data, s -> s.reduce(irMax));
    folded = exerciseTerminalOps(data, s -> s.reduce(Integer.MIN_VALUE, irMax));
    assertEquals(folded, seedless.orElse(Integer.MIN_VALUE));
    seedless = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(irPlus));
    folded = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(0, irPlus));
    assertEquals(folded, seedless.orElse(0));
    seedless = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(irMin));
    folded = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(Integer.MAX_VALUE, irMin));
    assertEquals(folded, seedless.orElse(Integer.MAX_VALUE));
    seedless = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(irMax));
    folded = exerciseTerminalOps(data, (IntStream s) -> s.map(irDoubler), s -> s.reduce(Integer.MIN_VALUE, irMax));
    assertEquals(folded, seedless.orElse(Integer.MIN_VALUE));
}