8074460: Always print seeds used in [Splittable]Random instances in java.math tests
Summary: Create a utility class which creates a pseudorandom number generator (PRNG) and retains the seed. Use this class in java.math tests which use a PRNG. Always print the seed value before the PRNG is used.
Reviewed-by: darcy
/*
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/*
* @test
* @bug 4654323
* @summary Tests functionality of isProbablePrime(Integer.MAX_VALUE)
*/
import java.math.*;
public class ProbablePrime {
public static void main(String [] argv) {
BigInteger num = new BigInteger("4");
int certainties[] = {-1, 0, 1, 2, 100, Integer.MAX_VALUE-1,
Integer.MAX_VALUE};
boolean expectations[] = {true, true, false, false, false,
false, false};
for(int i = 0; i < certainties.length; i++) {
boolean b;
if((b=num.isProbablePrime(certainties[i])) !=
expectations[i])
throw new RuntimeException("Unexpected answer " + b +
" for certainty " +
certainties[i]);
}
}
}