3 |
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* Expert Group and released to the public domain, as explained at |
4 |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
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*/ |
6 |
< |
import junit.framework.*; |
7 |
< |
import java.util.*; |
6 |
> |
|
7 |
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import java.util.SplittableRandom; |
8 |
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import java.util.concurrent.atomic.AtomicInteger; |
10 |
– |
import java.util.concurrent.atomic.AtomicLong; |
9 |
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import java.util.concurrent.atomic.LongAdder; |
10 |
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|
11 |
+ |
import junit.framework.Test; |
12 |
+ |
import junit.framework.TestSuite; |
13 |
+ |
|
14 |
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public class SplittableRandomTest extends JSR166TestCase { |
15 |
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|
16 |
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public static void main(String[] args) { |
17 |
< |
junit.textui.TestRunner.run(suite()); |
17 |
> |
main(suite(), args); |
18 |
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} |
19 |
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public static Test suite() { |
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return new TestSuite(SplittableRandomTest.class); |
40 |
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static final int NCALLS = 10000; |
41 |
|
|
42 |
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// max sampled int bound |
43 |
< |
static final int MAX_INT_BOUND = (1 << 28); |
43 |
> |
static final int MAX_INT_BOUND = (1 << 26); |
44 |
|
|
45 |
|
// max sampled long bound |
46 |
< |
static final long MAX_LONG_BOUND = (1L << 42); |
46 |
> |
static final long MAX_LONG_BOUND = (1L << 40); |
47 |
|
|
48 |
|
// Number of replications for other checks |
49 |
< |
static final int REPS = 20; |
49 |
> |
static final int REPS = |
50 |
> |
Integer.getInteger("SplittableRandomTest.reps", 4); |
51 |
|
|
52 |
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/** |
53 |
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* Repeated calls to nextInt produce at least two distinct results |
90 |
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* same values for nextLong. |
91 |
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*/ |
92 |
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public void testSeedConstructor() { |
93 |
< |
for (long seed = 2; seed < MAX_LONG_BOUND; seed += 15485863) { |
93 |
> |
for (long seed = 2; seed < MAX_LONG_BOUND; seed += 15485863) { |
94 |
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SplittableRandom sr1 = new SplittableRandom(seed); |
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SplittableRandom sr2 = new SplittableRandom(seed); |
96 |
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for (int i = 0; i < REPS; ++i) |
129 |
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} |
130 |
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|
131 |
|
/** |
132 |
< |
* nextInt(negative) throws IllegalArgumentException |
132 |
> |
* nextInt(non-positive) throws IllegalArgumentException |
133 |
|
*/ |
134 |
< |
public void testNextIntBoundedNeg() { |
134 |
> |
public void testNextIntBoundNonPositive() { |
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|
SplittableRandom sr = new SplittableRandom(); |
136 |
< |
try { |
137 |
< |
int f = sr.nextInt(-17); |
138 |
< |
shouldThrow(); |
139 |
< |
} catch (IllegalArgumentException success) {} |
136 |
> |
Runnable[] throwingActions = { |
137 |
> |
() -> sr.nextInt(-17), |
138 |
> |
() -> sr.nextInt(0), |
139 |
> |
() -> sr.nextInt(Integer.MIN_VALUE), |
140 |
> |
}; |
141 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
142 |
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} |
143 |
|
|
144 |
|
/** |
146 |
|
*/ |
147 |
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public void testNextIntBadBounds() { |
148 |
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SplittableRandom sr = new SplittableRandom(); |
149 |
< |
try { |
150 |
< |
int f = sr.nextInt(17, 2); |
151 |
< |
shouldThrow(); |
152 |
< |
} catch (IllegalArgumentException success) {} |
149 |
> |
Runnable[] throwingActions = { |
150 |
> |
() -> sr.nextInt(17, 2), |
151 |
> |
() -> sr.nextInt(-42, -42), |
152 |
> |
() -> sr.nextInt(Integer.MAX_VALUE, Integer.MIN_VALUE), |
153 |
> |
}; |
154 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
155 |
|
} |
156 |
|
|
157 |
|
/** |
160 |
|
*/ |
161 |
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public void testNextIntBounded() { |
162 |
|
SplittableRandom sr = new SplittableRandom(); |
163 |
+ |
for (int i = 0; i < 2; i++) assertEquals(0, sr.nextInt(1)); |
164 |
|
// sample bound space across prime number increments |
165 |
|
for (int bound = 2; bound < MAX_INT_BOUND; bound += 524959) { |
166 |
|
int f = sr.nextInt(bound); |
199 |
|
} |
200 |
|
|
201 |
|
/** |
202 |
< |
* nextLong(negative) throws IllegalArgumentException |
202 |
> |
* nextLong(non-positive) throws IllegalArgumentException |
203 |
|
*/ |
204 |
< |
public void testNextLongBoundedNeg() { |
204 |
> |
public void testNextLongBoundNonPositive() { |
205 |
|
SplittableRandom sr = new SplittableRandom(); |
206 |
< |
try { |
207 |
< |
long f = sr.nextLong(-17); |
208 |
< |
shouldThrow(); |
209 |
< |
} catch (IllegalArgumentException success) {} |
206 |
> |
Runnable[] throwingActions = { |
207 |
> |
() -> sr.nextLong(-17L), |
208 |
> |
() -> sr.nextLong(0L), |
209 |
> |
() -> sr.nextLong(Long.MIN_VALUE), |
210 |
> |
}; |
211 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
212 |
|
} |
213 |
|
|
214 |
|
/** |
216 |
|
*/ |
217 |
|
public void testNextLongBadBounds() { |
218 |
|
SplittableRandom sr = new SplittableRandom(); |
219 |
< |
try { |
220 |
< |
long f = sr.nextLong(17, 2); |
221 |
< |
shouldThrow(); |
222 |
< |
} catch (IllegalArgumentException success) {} |
219 |
> |
Runnable[] throwingActions = { |
220 |
> |
() -> sr.nextLong(17L, 2L), |
221 |
> |
() -> sr.nextLong(-42L, -42L), |
222 |
> |
() -> sr.nextLong(Long.MAX_VALUE, Long.MIN_VALUE), |
223 |
> |
}; |
224 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
225 |
|
} |
226 |
|
|
227 |
|
/** |
230 |
|
*/ |
231 |
|
public void testNextLongBounded() { |
232 |
|
SplittableRandom sr = new SplittableRandom(); |
233 |
+ |
for (int i = 0; i < 2; i++) assertEquals(0L, sr.nextLong(1L)); |
234 |
|
for (long bound = 2; bound < MAX_LONG_BOUND; bound += 15485863) { |
235 |
|
long f = sr.nextLong(bound); |
236 |
|
assertTrue(0 <= f && f < bound); |
268 |
|
} |
269 |
|
|
270 |
|
/** |
271 |
+ |
* nextDouble(non-positive) throws IllegalArgumentException |
272 |
+ |
*/ |
273 |
+ |
public void testNextDoubleBoundNonPositive() { |
274 |
+ |
SplittableRandom sr = new SplittableRandom(); |
275 |
+ |
Runnable[] throwingActions = { |
276 |
+ |
() -> sr.nextDouble(-17.0d), |
277 |
+ |
() -> sr.nextDouble(0.0d), |
278 |
+ |
() -> sr.nextDouble(-Double.MIN_VALUE), |
279 |
+ |
() -> sr.nextDouble(Double.NEGATIVE_INFINITY), |
280 |
+ |
() -> sr.nextDouble(Double.NaN), |
281 |
+ |
}; |
282 |
+ |
assertThrows(IllegalArgumentException.class, throwingActions); |
283 |
+ |
} |
284 |
+ |
|
285 |
+ |
/** |
286 |
+ |
* nextDouble(! (least < bound)) throws IllegalArgumentException |
287 |
+ |
*/ |
288 |
+ |
public void testNextDoubleBadBounds() { |
289 |
+ |
SplittableRandom sr = new SplittableRandom(); |
290 |
+ |
Runnable[] throwingActions = { |
291 |
+ |
() -> sr.nextDouble(17.0d, 2.0d), |
292 |
+ |
() -> sr.nextDouble(-42.0d, -42.0d), |
293 |
+ |
() -> sr.nextDouble(Double.MAX_VALUE, Double.MIN_VALUE), |
294 |
+ |
() -> sr.nextDouble(Double.NaN, 0.0d), |
295 |
+ |
() -> sr.nextDouble(0.0d, Double.NaN), |
296 |
+ |
}; |
297 |
+ |
assertThrows(IllegalArgumentException.class, throwingActions); |
298 |
+ |
} |
299 |
+ |
|
300 |
+ |
// TODO: Test infinite bounds! |
301 |
+ |
//() -> sr.nextDouble(Double.NEGATIVE_INFINITY, 0.0d), |
302 |
+ |
//() -> sr.nextDouble(0.0d, Double.POSITIVE_INFINITY), |
303 |
+ |
|
304 |
+ |
/** |
305 |
|
* nextDouble(least, bound) returns least <= value < bound; |
306 |
|
* repeated calls produce at least two distinct results |
307 |
|
*/ |
329 |
|
*/ |
330 |
|
public void testBadStreamSize() { |
331 |
|
SplittableRandom r = new SplittableRandom(); |
332 |
< |
try { |
333 |
< |
java.util.stream.IntStream x = r.ints(-1L); |
334 |
< |
shouldThrow(); |
335 |
< |
} catch (IllegalArgumentException success) {} |
336 |
< |
try { |
337 |
< |
java.util.stream.IntStream x = r.ints(-1L, 2, 3); |
338 |
< |
shouldThrow(); |
339 |
< |
} catch (IllegalArgumentException success) {} |
340 |
< |
try { |
295 |
< |
java.util.stream.LongStream x = r.longs(-1L); |
296 |
< |
shouldThrow(); |
297 |
< |
} catch (IllegalArgumentException success) {} |
298 |
< |
try { |
299 |
< |
java.util.stream.LongStream x = r.longs(-1L, -1L, 1L); |
300 |
< |
shouldThrow(); |
301 |
< |
} catch (IllegalArgumentException success) {} |
302 |
< |
try { |
303 |
< |
java.util.stream.DoubleStream x = r.doubles(-1L); |
304 |
< |
shouldThrow(); |
305 |
< |
} catch (IllegalArgumentException success) {} |
306 |
< |
try { |
307 |
< |
java.util.stream.DoubleStream x = r.doubles(-1L, .5, .6); |
308 |
< |
shouldThrow(); |
309 |
< |
} catch (IllegalArgumentException success) {} |
332 |
> |
Runnable[] throwingActions = { |
333 |
> |
() -> { java.util.stream.IntStream x = r.ints(-1L); }, |
334 |
> |
() -> { java.util.stream.IntStream x = r.ints(-1L, 2, 3); }, |
335 |
> |
() -> { java.util.stream.LongStream x = r.longs(-1L); }, |
336 |
> |
() -> { java.util.stream.LongStream x = r.longs(-1L, -1L, 1L); }, |
337 |
> |
() -> { java.util.stream.DoubleStream x = r.doubles(-1L); }, |
338 |
> |
() -> { java.util.stream.DoubleStream x = r.doubles(-1L, .5, .6); }, |
339 |
> |
}; |
340 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
341 |
|
} |
342 |
|
|
343 |
|
/** |
346 |
|
*/ |
347 |
|
public void testBadStreamBounds() { |
348 |
|
SplittableRandom r = new SplittableRandom(); |
349 |
< |
try { |
350 |
< |
java.util.stream.IntStream x = r.ints(2, 1); |
351 |
< |
shouldThrow(); |
352 |
< |
} catch (IllegalArgumentException success) {} |
353 |
< |
try { |
354 |
< |
java.util.stream.IntStream x = r.ints(10, 42, 42); |
355 |
< |
shouldThrow(); |
356 |
< |
} catch (IllegalArgumentException success) {} |
357 |
< |
try { |
327 |
< |
java.util.stream.LongStream x = r.longs(-1L, -1L); |
328 |
< |
shouldThrow(); |
329 |
< |
} catch (IllegalArgumentException success) {} |
330 |
< |
try { |
331 |
< |
java.util.stream.LongStream x = r.longs(10, 1L, -2L); |
332 |
< |
shouldThrow(); |
333 |
< |
} catch (IllegalArgumentException success) {} |
334 |
< |
try { |
335 |
< |
java.util.stream.DoubleStream x = r.doubles(0.0, 0.0); |
336 |
< |
shouldThrow(); |
337 |
< |
} catch (IllegalArgumentException success) {} |
338 |
< |
try { |
339 |
< |
java.util.stream.DoubleStream x = r.doubles(10, .5, .4); |
340 |
< |
shouldThrow(); |
341 |
< |
} catch (IllegalArgumentException success) {} |
349 |
> |
Runnable[] throwingActions = { |
350 |
> |
() -> { java.util.stream.IntStream x = r.ints(2, 1); }, |
351 |
> |
() -> { java.util.stream.IntStream x = r.ints(10, 42, 42); }, |
352 |
> |
() -> { java.util.stream.LongStream x = r.longs(-1L, -1L); }, |
353 |
> |
() -> { java.util.stream.LongStream x = r.longs(10, 1L, -2L); }, |
354 |
> |
() -> { java.util.stream.DoubleStream x = r.doubles(0.0, 0.0); }, |
355 |
> |
() -> { java.util.stream.DoubleStream x = r.doubles(10, .5, .4); }, |
356 |
> |
}; |
357 |
> |
assertThrows(IllegalArgumentException.class, throwingActions); |
358 |
|
} |
359 |
|
|
360 |
|
/** |
366 |
|
long size = 0; |
367 |
|
for (int reps = 0; reps < REPS; ++reps) { |
368 |
|
counter.reset(); |
369 |
< |
r.ints(size).parallel().forEach(x -> {counter.increment();}); |
369 |
> |
r.ints(size).parallel().forEach(x -> counter.increment()); |
370 |
|
assertEquals(size, counter.sum()); |
371 |
|
size += 524959; |
372 |
|
} |
381 |
|
long size = 0; |
382 |
|
for (int reps = 0; reps < REPS; ++reps) { |
383 |
|
counter.reset(); |
384 |
< |
r.longs(size).parallel().forEach(x -> {counter.increment();}); |
384 |
> |
r.longs(size).parallel().forEach(x -> counter.increment()); |
385 |
|
assertEquals(size, counter.sum()); |
386 |
|
size += 524959; |
387 |
|
} |
396 |
|
long size = 0; |
397 |
|
for (int reps = 0; reps < REPS; ++reps) { |
398 |
|
counter.reset(); |
399 |
< |
r.doubles(size).parallel().forEach(x -> {counter.increment();}); |
399 |
> |
r.doubles(size).parallel().forEach(x -> counter.increment()); |
400 |
|
assertEquals(size, counter.sum()); |
401 |
|
size += 524959; |
402 |
|
} |
412 |
|
for (int least = -15485867; least < MAX_INT_BOUND; least += 524959) { |
413 |
|
for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 67867967) { |
414 |
|
final int lo = least, hi = bound; |
415 |
< |
r.ints(size, lo, hi).parallel(). |
416 |
< |
forEach(x -> {if (x < lo || x >= hi) |
417 |
< |
fails.getAndIncrement(); }); |
415 |
> |
r.ints(size, lo, hi).parallel().forEach( |
416 |
> |
x -> { |
417 |
> |
if (x < lo || x >= hi) |
418 |
> |
fails.getAndIncrement(); }); |
419 |
|
} |
420 |
|
} |
421 |
|
assertEquals(0, fails.get()); |
431 |
|
for (long least = -86028121; least < MAX_LONG_BOUND; least += 1982451653L) { |
432 |
|
for (long bound = least + 2; bound > least && bound < MAX_LONG_BOUND; bound += Math.abs(bound * 7919)) { |
433 |
|
final long lo = least, hi = bound; |
434 |
< |
r.longs(size, lo, hi).parallel(). |
435 |
< |
forEach(x -> {if (x < lo || x >= hi) |
436 |
< |
fails.getAndIncrement(); }); |
434 |
> |
r.longs(size, lo, hi).parallel().forEach( |
435 |
> |
x -> { |
436 |
> |
if (x < lo || x >= hi) |
437 |
> |
fails.getAndIncrement(); }); |
438 |
|
} |
439 |
|
} |
440 |
|
assertEquals(0, fails.get()); |
450 |
|
for (double least = 0.00011; least < 1.0e20; least *= 9) { |
451 |
|
for (double bound = least * 1.0011; bound < 1.0e20; bound *= 17) { |
452 |
|
final double lo = least, hi = bound; |
453 |
< |
r.doubles(size, lo, hi).parallel(). |
454 |
< |
forEach(x -> {if (x < lo || x >= hi) |
455 |
< |
fails.getAndIncrement(); }); |
453 |
> |
r.doubles(size, lo, hi).parallel().forEach( |
454 |
> |
x -> { |
455 |
> |
if (x < lo || x >= hi) |
456 |
> |
fails.getAndIncrement(); }); |
457 |
|
} |
458 |
|
} |
459 |
|
assertEquals(0, fails.get()); |
466 |
|
LongAdder counter = new LongAdder(); |
467 |
|
SplittableRandom r = new SplittableRandom(); |
468 |
|
long size = 100; |
469 |
< |
r.ints().limit(size).parallel().forEach(x -> {counter.increment();}); |
469 |
> |
r.ints().limit(size).parallel().forEach(x -> counter.increment()); |
470 |
|
assertEquals(size, counter.sum()); |
471 |
|
} |
472 |
|
|
477 |
|
LongAdder counter = new LongAdder(); |
478 |
|
SplittableRandom r = new SplittableRandom(); |
479 |
|
long size = 100; |
480 |
< |
r.longs().limit(size).parallel().forEach(x -> {counter.increment();}); |
480 |
> |
r.longs().limit(size).parallel().forEach(x -> counter.increment()); |
481 |
|
assertEquals(size, counter.sum()); |
482 |
|
} |
483 |
|
|
488 |
|
LongAdder counter = new LongAdder(); |
489 |
|
SplittableRandom r = new SplittableRandom(); |
490 |
|
long size = 100; |
491 |
< |
r.doubles().limit(size).parallel().forEach(x -> {counter.increment();}); |
491 |
> |
r.doubles().limit(size).parallel().forEach(x -> counter.increment()); |
492 |
|
assertEquals(size, counter.sum()); |
493 |
|
} |
494 |
|
|
499 |
|
LongAdder counter = new LongAdder(); |
500 |
|
SplittableRandom r = new SplittableRandom(); |
501 |
|
long size = 100; |
502 |
< |
r.ints().limit(size).forEach(x -> {counter.increment();}); |
502 |
> |
r.ints().limit(size).forEach(x -> counter.increment()); |
503 |
|
assertEquals(size, counter.sum()); |
504 |
|
} |
505 |
|
|
510 |
|
LongAdder counter = new LongAdder(); |
511 |
|
SplittableRandom r = new SplittableRandom(); |
512 |
|
long size = 100; |
513 |
< |
r.longs().limit(size).forEach(x -> {counter.increment();}); |
513 |
> |
r.longs().limit(size).forEach(x -> counter.increment()); |
514 |
|
assertEquals(size, counter.sum()); |
515 |
|
} |
516 |
|
|
521 |
|
LongAdder counter = new LongAdder(); |
522 |
|
SplittableRandom r = new SplittableRandom(); |
523 |
|
long size = 100; |
524 |
< |
r.doubles().limit(size).forEach(x -> {counter.increment();}); |
524 |
> |
r.doubles().limit(size).forEach(x -> counter.increment()); |
525 |
|
assertEquals(size, counter.sum()); |
526 |
|
} |
527 |
|
|