Use same seed for the two identical random sources in the test.
diff --git a/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/distribution/PoissonSamplerCacheTest.java b/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/distribution/PoissonSamplerCacheTest.java
index 87979e2..5f0d753 100644
--- a/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/distribution/PoissonSamplerCacheTest.java
+++ b/commons-rng-sampling/src/test/java/org/apache/commons/rng/sampling/distribution/PoissonSamplerCacheTest.java
@@ -16,7 +16,6 @@
*/
package org.apache.commons.rng.sampling.distribution;
-import org.apache.commons.rng.RandomProviderState;
import org.apache.commons.rng.RestorableUniformRandomProvider;
import org.apache.commons.rng.simple.RandomSource;
import org.junit.Assert;
@@ -327,12 +326,12 @@
private void checkComputeSameSamplesAsPoissonSampler(int minMean,
int maxMean) {
// Two identical RNGs
+ final RandomSource source = RandomSource.SPLIT_MIX_64;
+ final long seed = RandomSource.createLong();
final RestorableUniformRandomProvider rng1 =
- RandomSource.create(RandomSource.WELL_19937_C);
- final RandomProviderState state = rng1.saveState();
+ RandomSource.create(source, seed);
final RestorableUniformRandomProvider rng2 =
- RandomSource.create(RandomSource.WELL_19937_C);
- rng2.restoreState(state);
+ RandomSource.create(source, seed);
// Create the cache with the given range
final PoissonSamplerCache cache =
@@ -456,11 +455,12 @@
int minMean2,
int maxMean2) {
// Two identical RNGs
+ final RandomSource source = RandomSource.SPLIT_MIX_64;
+ final long seed = RandomSource.createLong();
final RestorableUniformRandomProvider rng1 =
- RandomSource.create(RandomSource.WELL_19937_C);
- final RandomProviderState state = rng1.saveState();
+ RandomSource.create(source, seed);
final RestorableUniformRandomProvider rng2 =
- RandomSource.create(RandomSource.WELL_19937_C);
+ RandomSource.create(source, seed);
// Create the cache with the given range and fill it
final PoissonSamplerCache cache =
@@ -474,9 +474,6 @@
final PoissonSamplerCache cache2 = cache.withRange(minMean2, maxMean2);
Assert.assertTrue("WithRange cache is the same object", cache != cache2);
- rng1.restoreState(state);
- rng2.restoreState(state);
-
// Test all means in the test range (which may be different
// from the cache range).
for (int i = minRange; i <= maxRange; i++) {
