6 use Test::More tests => 4;
8 # Generate a load of random numbers.
9 # int() avoids possible floating point error.
10 sub mk_rand { map int rand 10000, 1..100; }
13 # Check that rand() is deterministic.
15 my @first_run = mk_rand;
18 my @second_run = mk_rand;
20 ok( eq_array(\@first_run, \@second_run), 'srand(), same arg, same rands' );
23 # Check that different seeds provide different random numbers
28 @second_run = mk_rand;
30 ok( !eq_array(\@first_run, \@second_run),
31 'srand(), different arg, different rands' );
34 # Check that srand() isn't affected by $_
41 @second_run = mk_rand;
43 ok( !eq_array(\@first_run, \@second_run),
44 'srand(), no arg, not affected by $_');
47 # This test checks whether Perl called srand for you.
48 @first_run = `$^X -le "print int rand 100 for 1..100"`;
49 @second_run = `$^X -le "print int rand 100 for 1..100"`;
51 ok( !eq_array(\@first_run, \@second_run), 'srand() called automatically');