I need to get predictible integer random number sequence (for use in unit tests).
Sequence should be strictly same on each run. It does not have to be really random (nor secure random of course)

Seems it's docummented that I can use srand() for this:
perldoc srand:
However, there are a few situations where programs are likely to want to call srand. One is for generating predictable results, generally for testing or debugging. There, you use srand($seed), with the same $seed each time.
So I wrote the following code: 
use strict;
use warnings;
use List::Util qw/min/;

sub t
{
 sprintf("%0.0f", shift()*10000)
}

sub rn
{
 my $e = 1e-6;
 my $x = rand();
 return min(t($x), t($x+$e), t($x-$e));
}

srand(42654);
print rn(), "\n";
print rn(), "\n";
print rn(), "\n";
print rn(), "\n";

[download]
prints: 
3725
3516
7534
1948

[download]
I use 
min(t($x), t($x+$e), t($x-$e))

[download]
to get rid of possible float off-by-0.0000...00001 problems.
Questions are:
1. Will this work as expected? On each and every possible perl build and platform?
2. Is there a better way to do it?

In reply to Predictable random sequence by vsespb

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