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

Example 1 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testNextLongBounded2.

/**
     * nextLong(least, bound) returns least <= value < bound;
     * repeated calls produce at least two distinct results
     */
public void testNextLongBounded2() {
    SplittableRandom sr = new SplittableRandom();
    for (long least = -86028121; least < MAX_LONG_BOUND; least += 982451653L) {
        for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) {
            long f = sr.nextLong(least, bound);
            assertTrue(least <= f && f < bound);
            int i = 0;
            long j;
            while (i < NCALLS && (j = sr.nextLong(least, bound)) == f) {
                assertTrue(least <= j && j < bound);
                ++i;
            }
            assertTrue(i < NCALLS);
        }
    }
}

Example 2 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

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 3 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testUnsizedDoublesCountSeq.

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

Example 4 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

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 5 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testNextDouble.

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