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

Example 26 with SplittableRandom

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

the class SplittableRandomTest method testSplit1.

/**
 * A SplittableRandom produced by split() of a default-constructed
 * SplittableRandom generates a different sequence
 */
public void testSplit1() {
    SplittableRandom sr = new SplittableRandom();
    for (int reps = 0; reps < REPS; ++reps) {
        SplittableRandom sc = sr.split();
        int i = 0;
        while (i < NCALLS && sr.nextLong() == sc.nextLong()) ++i;
        assertTrue(i < NCALLS);
    }
}

Example 27 with SplittableRandom

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

the class SplittableRandomTest method testNextLongBoundedNeg.

/**
 * nextLong(negative) throws IllegalArgumentException
 */
@Test(expectedExceptions = IllegalArgumentException.class)
public void testNextLongBoundedNeg() {
    SplittableRandom sr = new SplittableRandom();
    long f = sr.nextLong(-17);
}

Example 28 with SplittableRandom

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

the class SplittableRandomTest method testNextIntBadBounds.

/**
 * nextInt(least >= bound) throws IllegalArgumentException
 */
@Test(expectedExceptions = IllegalArgumentException.class)
public void testNextIntBadBounds() {
    SplittableRandom sr = new SplittableRandom();
    int f = sr.nextInt(17, 2);
}

Example 29 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() {
    final LongAdder counter = new LongAdder();
    SplittableRandom r = new SplittableRandom();
    long size = 100;
    r.ints().limit(size).forEach(new IntConsumer() {

        @Override
        public void accept(int x) {
            counter.increment();
        }
    });
    assertEquals(counter.sum(), size);
}

Example 30 with SplittableRandom

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

the class SplittableRandomTest method testNextIntBounded.

/**
 * nextInt(bound) returns 0 <= value < bound;
 * repeated calls produce at least two distinct results
 */
public void testNextIntBounded() {
    SplittableRandom sr = new SplittableRandom();
    // sample bound space across prime number increments
    for (int bound = 2; bound < MAX_INT_BOUND; bound += 524959) {
        int f = sr.nextInt(bound);
        assertTrue(0 <= f && f < bound);
        int i = 0;
        int j;
        while (i < NCALLS && (j = sr.nextInt(bound)) == f) {
            assertTrue(0 <= j && j < bound);
            ++i;
        }
        assertTrue(i < NCALLS);
    }
}