| Subject: | use of POSIX::strtod forces locales |
| Date: | Mon, 8 Apr 2013 15:29:12 +0200 |
| To: | bug-Test-Approx [...] rt.cpan.org |
| From: | Frank Wesemann <f.wesemann [...] fotofinder.com> |
Dear Steve,
the usage of POSIX::strtod and strtol in the Test:.Approx Module
forces the users locales to become "active".
with locale enviroment set to "de_DE" assume this little script:
#!/usr/bin/perl
use strict;
use warnings;
use utf8;
use Test::Approx();
my $dings = 3;
my $dongs = $dings / 1000;
print " dongs: ", $dongs, "\n";
#prints "0.003"
Test::Approx::is_approx($dings, 3);
my $ding_dong = $dings / 1000;
print "ding_dong: ", $ding_dong, "\n";
#prints "0,003" (mind the changed decimal point!)
additionally you can see that Test::Approx isn't doing the right thing at all:
my $type = Test::Approx::check_type($dongs);
print "type: ", $type, "\n";
#prints "str"
In the "check-type" subroutine you assume the decimal_point to be "."
which _may_ be correct.
Workarounds?
As setting the locale to your assumptions ( and resetting it to the
users locale afterwards ) also changes the testing environment, in my
opinion you should just mention in the docs, that the user should
setlocales on his own in his test files.
best
frank
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mit freundlichem Gruß,
Frank Wesemann
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