Improve argument checking

[perl/modules/Scalar-Vec-Util.git] / t / 40-vshift.t

diff --git a/t/40-vshift.t b/t/40-vshift.t
index 5fe1b69feded44e87c5d534b904bc2faba27cee9..4c27c8324846b80f5837f64352718cdf8ff1e0f5 100644 (file)
--- a/t/40-vshift.t
+++ b/t/40-vshift.t
@@ -7,6 +7,13 @@ use Test::More 'no_plan';
 
 use Scalar::Vec::Util qw/vshift SVU_SIZE/;
 
+for ([ 1, 'offset', -1 ], [ 2, 'length', '-1' ]) {
+ my @args  = ('1') x 4;
+ $args[$_->[0]] = $_->[2];
+ eval { &vshift(@args) }; my $line = __LINE__;
+ like $@, qr/^Invalid\s+negative\s+$_->[1]\s+at\s+\Q$0\E\s+line\s+$line/;
+}
+
 my $p = SVU_SIZE;
 $p = 8 if $p < 8;
 my $n = 3 * $p;