Examples with ThreadLocalRandom java8.util.concurrent.ThreadLocalRandom used on opensource projects

Example 41 with ThreadLocalRandom

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

the class ThreadLocalRandom8Test method testBadStreamSize.

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

Example 42 with ThreadLocalRandom

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

the class ThreadLocalRandom8Test method testDoublesCount.

/**
 * A parallel sized stream of doubles generates the given number of values
 */
public void testDoublesCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 0;
    for (int reps = 0; reps < REPS; ++reps) {
        counter.reset();
        r.doubles(size).parallel().forEach(x -> counter.increment());
        assertEquals(size, counter.sum());
        size += 524959;
    }
}

Example 43 with ThreadLocalRandom

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

the class ThreadLocalRandom8Test method testLongsCount.

/**
 * A parallel sized stream of longs generates the given number of values
 */
public void testLongsCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 0;
    for (int reps = 0; reps < REPS; ++reps) {
        counter.reset();
        r.longs(size).parallel().forEach(x -> counter.increment());
        assertEquals(size, counter.sum());
        size += 524959;
    }
}

Example 44 with ThreadLocalRandom

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

the class ThreadLocalRandom8Test method testUnsizedIntsCount.

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

Example 45 with ThreadLocalRandom

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

the class ThreadLocalRandom8Test 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(0, fails.get());
}