a more sophisticated test, covering errors too
# https://perlmonks.org/?node_id=11119273
use strict;
use warnings;
use feature qw(signatures);
no warnings qw(experimental::signatures);
use B::Deparse;
use Test::More;
sub foo ($this, $that='bar') {
return scalar @_;
}
t_foo(0,undef,'Too few arguments');
t_foo(1,1,"One arg");
t_foo(2,2,"Two args");
t_foo(3,undef,"Too many arguments");
done_testing();
sub t_foo {
my ($n_args, $exp, $desc ) = @_;
my @args = ("","a".."z")[1..$n_args];
my $code = "foo(qw/@args/)";
my $got = eval $code;
unless ($@) {
is( $got, $exp,
"<$code> \t $desc: \@_ == $got"
);
} else {
ok( $@ =~ $desc,
"<$code> \t ERR: $desc: ");
}
}
#diag "Show sig implementation:\n", B::Deparse->new()->coderef2text(\&
+foo);
C:/Perl_524/bin\perl.exe -w d:/exp/pm_signatures.pl
ok 1 - <foo(qw//)> ERR: Too few arguments:
ok 2 - <foo(qw/a/)> One arg: @_ == 1
ok 3 - <foo(qw/a b/)> Two args: @_ == 2
ok 4 - <foo(qw/a b c/)> ERR: Too many arguments:
1..4
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.