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

Example 26 with ThreadLocalRandom

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

the class ThreadLocalRandomTest method testUnsizedLongsCountSeq.

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

Example 27 with ThreadLocalRandom

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

the class ThreadLocalRandomTest method testNextDoubleBadBound.

/**
 * nextDouble(bound) throws IllegalArgumentException
 */
public void testNextDoubleBadBound() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.nextDouble(0.0));
    executeAndCatchIAE(() -> r.nextDouble(-0.0));
    executeAndCatchIAE(() -> r.nextDouble(+0.0));
    executeAndCatchIAE(() -> r.nextDouble(-1.0));
    executeAndCatchIAE(() -> r.nextDouble(Double.NaN));
    executeAndCatchIAE(() -> r.nextDouble(Double.NEGATIVE_INFINITY));
// Returns Double.MAX_VALUE
// executeAndCatchIAE(() -> r.nextDouble(Double.POSITIVE_INFINITY));
}

Example 28 with ThreadLocalRandom

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

the class ThreadLocalRandomTest method testBadStreamBounds.

/**
 * Invoking bounded ints, long, doubles, with illegal bounds throws
 * IllegalArgumentException
 */
public void testBadStreamBounds() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.ints(2, 1));
    executeAndCatchIAE(() -> r.ints(10, 42, 42));
    executeAndCatchIAE(() -> r.longs(-1L, -1L));
    executeAndCatchIAE(() -> r.longs(10, 1L, -2L));
    testDoubleBadOriginBound((o, b) -> r.doubles(10, o, b));
}

Example 29 with ThreadLocalRandom

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

the class ThreadLocalRandomTest method testUnsizedIntsCountSeq.

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

Example 30 with ThreadLocalRandom

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

the class Collection8Test method testObjectMethods.

@Test(dataProvider = "Source")
public void testObjectMethods(String description, Supplier<CollectionImplementation> sci) {
    ThreadLocalRandom rnd = ThreadLocalRandom.current();
    Collection c = sci.get().emptyCollection();
    for (int n = rnd.nextInt(3); n-- > 0; ) c.add(sci.get().makeElement(rnd.nextInt()));
    assertEquals(c, c);
    if (c instanceof List) {
        List<?> copy = new ArrayList(c);
        assertEquals(copy, c);
        assertEquals(c, copy);
        assertEquals(copy.hashCode(), c.hashCode());
    }
    if (c instanceof Set) {
        Set<?> copy = new HashSet(c);
        assertEquals(copy, c);
        assertEquals(c, copy);
        assertEquals(copy.hashCode(), c.hashCode());
    }
}