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

Example 41 with SplittableRandom

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

the class SplittableRandomTest method testNextDoubleBadBound.

/**
 * nextDouble(bound) throws IllegalArgumentException
 */
public void testNextDoubleBadBound() {
    final SplittableRandom sr = new SplittableRandom();
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(0.0);
        }
    });
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(-0.0);
        }
    });
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(+0.0);
        }
    });
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(-1.0);
        }
    });
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(Double.NaN);
        }
    });
    executeAndCatchIAE(new Runnable() {

        @Override
        public void run() {
            sr.nextDouble(Double.NEGATIVE_INFINITY);
        }
    });
// Returns Double.MAX_VALUE
// executeAndCatchIAE(() -> r.nextDouble(Double.POSITIVE_INFINITY));
}

Example 42 with SplittableRandom

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

the class SplittableRandomTest method testNextInt.

/**
 * Repeated calls to nextInt produce at least two distinct results
 */
public void testNextInt() {
    SplittableRandom sr = new SplittableRandom();
    int f = sr.nextInt();
    int i = 0;
    while (i < NCALLS && sr.nextInt() == f) ++i;
    assertTrue(i < NCALLS);
}

Example 43 with SplittableRandom

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

the class SplittableRandomTest method testNextLongBounded.

/**
 * nextLong(bound) returns 0 <= value < bound;
 * repeated calls produce at least two distinct results
 */
public void testNextLongBounded() {
    SplittableRandom sr = new SplittableRandom();
    for (long bound = 2; bound < MAX_LONG_BOUND; bound += 15485863) {
        long f = sr.nextLong(bound);
        assertTrue(0 <= f && f < bound);
        int i = 0;
        long j;
        while (i < NCALLS && (j = sr.nextLong(bound)) == f) {
            assertTrue(0 <= j && j < bound);
            ++i;
        }
        assertTrue(i < NCALLS);
    }
}

Example 44 with SplittableRandom

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

the class SplittableRandomTest method testUnsizedLongsCountSeq.

/**
 * A sequential unsized stream of longs generates at least 100 values
 */
public void testUnsizedLongsCountSeq() {
    final LongAdder counter = new LongAdder();
    SplittableRandom r = new SplittableRandom();
    long size = 100;
    r.longs().limit(size).forEach(new LongConsumer() {

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

Example 45 with SplittableRandom

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

the class SplittableRandomTest method testUnsizedDoublesCount.

/**
 * A parallel unsized stream of doubles generates at least 100 values
 */
public void testUnsizedDoublesCount() {
    final LongAdder counter = new LongAdder();
    SplittableRandom r = new SplittableRandom();
    long size = 100;
    r.doubles().limit(size).parallel().forEach(new DoubleConsumer() {

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