Examples with Doubles java8.lang.Doubles used on opensource projects

Example 11 with Doubles

use of java8.lang.Doubles in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testUnsizedDoublesCount.

/**
 * A parallel unsized stream of doubles generates at least 100 values
 */
public void testUnsizedDoublesCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.doubles().limit(size).parallel().forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}

Example 12 with Doubles

use of java8.lang.Doubles in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testUnsizedDoublesCountSeq.

/**
 * A sequential unsized stream of doubles generates at least 100 values
 */
public void testUnsizedDoublesCountSeq() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.doubles().limit(size).forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}

Example 13 with Doubles

use of java8.lang.Doubles in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testBoundedDoubles.

/**
 * Each of a parallel sized stream of bounded doubles is within bounds
 */
public void testBoundedDoubles() {
    AtomicInteger fails = new AtomicInteger(0);
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 456;
    for (double least = 0.00011; least < 1.0e20; least *= 9) {
        for (double bound = least * 1.0011; bound < 1.0e20; bound *= 17) {
            final double lo = least, hi = bound;
            r.doubles(size, lo, hi).parallel().forEach(x -> {
                if (x < lo || x >= hi)
                    fails.getAndIncrement();
            });
        }
    }
    assertEquals(fails.get(), 0);
}

Example 14 with Doubles

use of java8.lang.Doubles in project streamsupport by stefan-zobel.

the class ThreadLocalRandomTest method testBadStreamSize.

/**
 * Invoking sized ints, long, doubles, with negative sizes throws
 * IllegalArgumentException
 */
public void testBadStreamSize() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.ints(-1L));
    executeAndCatchIAE(() -> r.ints(-1L, 2, 3));
    executeAndCatchIAE(() -> r.longs(-1L));
    executeAndCatchIAE(() -> r.longs(-1L, -1L, 1L));
    executeAndCatchIAE(() -> r.doubles(-1L));
    executeAndCatchIAE(() -> r.doubles(-1L, .5, .6));
}

Example 15 with Doubles

use of java8.lang.Doubles in project streamsupport by stefan-zobel.

the class SplittableRandomTest method doublesDataProvider.

@DataProvider(name = "doubles")
public static Object[][] doublesDataProvider() {
    List<Object[]> data = new ArrayList<>();
    // Function to create a stream using a RandomBoxedSpliterator
    Function<Function<SplittableRandom, Double>, DoubleStream> rbsf = sf -> StreamSupport.stream(new RandomBoxedSpliterator<>(new SplittableRandom(), 0, SIZE, sf), false).mapToDouble(i -> i);
    // Unbounded
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles().limit(%d)", SIZE), () -> new SplittableRandom().doubles().limit(SIZE)), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%d)", SIZE), () -> new SplittableRandom().doubles(SIZE)), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble())", SIZE), () -> rbsf.apply(sr -> sr.nextDouble())), randomAsserter(SIZE, Double.MAX_VALUE, 0d) });
    for (int b : BOUNDS) {
        for (int o : ORIGINS) {
            final double origin = o;
            final double bound = b;
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%f, %f).limit(%d)", origin, bound, SIZE), () -> new SplittableRandom().doubles(origin, bound).limit(SIZE)), randomAsserter(SIZE, origin, bound) });
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new SplittableRandom().doubles(%d, %f, %f)", SIZE, origin, bound), () -> new SplittableRandom().doubles(SIZE, origin, bound)), randomAsserter(SIZE, origin, bound) });
            if (origin == 0) {
                data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble(%f))", SIZE, bound), () -> rbsf.apply(sr -> sr.nextDouble(bound))), randomAsserter(SIZE, origin, bound) });
            }
            data.add(new Object[] { TestData.Factory.ofDoubleSupplier(String.format("new RandomBoxedSpliterator(0, %d, sr -> sr.nextDouble(%f, %f))", SIZE, origin, bound), () -> rbsf.apply(sr -> sr.nextDouble(origin, bound))), randomAsserter(SIZE, origin, bound) });
        }
    }
    return data.toArray(new Object[0][]);
}