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

Example 11 with SplittableRandom

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

the class SplittableRandomTest method testNextLongBadBounds.

/**
 * nextLong(least >= bound) throws IllegalArgumentException
 */
public void testNextLongBadBounds() {
    SplittableRandom sr = new SplittableRandom();
    Runnable[] throwingActions = { () -> sr.nextLong(17L, 2L), () -> sr.nextLong(-42L, -42L), () -> sr.nextLong(Long.MAX_VALUE, Long.MIN_VALUE) };
    assertThrows(IllegalArgumentException.class, throwingActions);
}

Example 12 with SplittableRandom

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

the class SplittableRandomTest method testBadStreamBounds.

/**
 * Invoking bounded ints, long, doubles, with illegal bounds throws
 * IllegalArgumentException
 */
@SuppressWarnings("unused")
public void testBadStreamBounds() {
    SplittableRandom r = new SplittableRandom();
    Runnable[] throwingActions = { () -> {
        java8.util.stream.IntStream x = r.ints(2, 1);
    }, () -> {
        java8.util.stream.IntStream x = r.ints(10, 42, 42);
    }, () -> {
        java8.util.stream.LongStream x = r.longs(-1L, -1L);
    }, () -> {
        java8.util.stream.LongStream x = r.longs(10, 1L, -2L);
    }, () -> {
        java8.util.stream.DoubleStream x = r.doubles(0.0, 0.0);
    }, () -> {
        java8.util.stream.DoubleStream x = r.doubles(10, .5, .4);
    } };
    assertThrows(IllegalArgumentException.class, throwingActions);
}

Example 13 with SplittableRandom

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

the class SplittableRandomTest method testUnsizedIntsCountSeq.

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

Example 14 with SplittableRandom

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

the class SplittableRandomTest method testNextIntBounded2.

/**
 * nextInt(least, bound) returns least <= value < bound;
 * repeated calls produce at least two distinct results
 */
public void testNextIntBounded2() {
    SplittableRandom sr = new SplittableRandom();
    for (int least = -15485863; least < MAX_INT_BOUND; least += 524959) {
        for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 49979687) {
            int f = sr.nextInt(least, bound);
            assertTrue(least <= f && f < bound);
            int i = 0;
            int j;
            while (i < NCALLS && (j = sr.nextInt(least, bound)) == f) {
                assertTrue(least <= j && j < bound);
                ++i;
            }
            assertTrue(i < NCALLS);
        }
    }
}

Example 15 with SplittableRandom

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

the class SplittableRandomTest method testNextBytes_nullArray.

public void testNextBytes_nullArray() {
    try {
        new SplittableRandom().nextBytes(null);
        shouldThrow();
    } catch (NullPointerException success) {
    }
}