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#!/usr/bin/perl
use strict;
use warnings;
use Test::More;
use Test::Warn;
use Test::Exception;
# Skip the test before Method::Signatures can try to compile it and blow up.
BEGIN {
plan skip_all => "Perl 5.10.1 or higher required to test where constraints" if $] < 5.01001;
}
use Method::Signatures;
my $where_func = q{ func silly_test ($x where { $_ == 3 }) {} };
warning_is { eval $where_func } undef, 'no warnings for using smartmatch';
subtest 'where { block() }' => sub {
plan tests => 3;
func small_int (Maybe[Int] $x where { $_ < 10 } is copy = 0 when undef) {
ok defined $x, "small_int($x) has defined value";
ok $x < 10, "small_int($x) has value in range";
return 1;
}
subtest "small_int()" => sub {
ok eval{ small_int(); }, "small_int() called as expected"
or note $@;
};
subtest "small_int(9)" => sub {
ok eval{ small_int(9); }, "small_int(9) called as expected"
or note $@;
};
subtest "small_int(10)" => sub {
ok !eval{ small_int(10);}, "small_int(10) not called (as expected)";
note $@;
};
};
subtest 'where [0..10]' => sub {
plan tests => 4;
func range_int (Maybe[Int] $x where [0..9] is copy = 0 when undef) {
ok defined $x, "range_int($x) has defined value";
ok 0 <= $x && $x <= 9, "range_int($x) has value in range";
return 1;
}
subtest "range_int()" => sub {
ok eval{ range_int(); }, "range_int() called as expected"
or note $@;
};
subtest "range_int(9)" => sub {
ok eval{ range_int(9); }, "range_int(9) called as expected"
or note $@;
};
subtest "range_int(10)" => sub {
ok !eval{ range_int(10);}, "range_int(10) not called (as expected)";
note $@;
};
subtest "range_int(-1)" => sub {
ok !eval{ range_int(-1);}, "range_int(10) not called (as expected)";
note $@;
};
};
subtest 'where { cat => 1, dog => 2}' => sub {
plan tests => 4;
func hash_member (Maybe[Str] $x where { cat => 1, dog => 2 } is copy = 'cat' when undef) {
ok defined $x, "hash_member($x) has defined value";
like $x, qr{^(cat|dog)$} , "hash_member($x) has value in range";
return 1;
}
subtest "hash_member()" => sub {
ok eval{ hash_member(); }, "hash_member() called as expected"
or note $@;
};
subtest "hash_member('cat')" => sub {
ok eval{ hash_member('cat'); }, "hash_member('cat') called as expected"
or note $@;
};
subtest "hash_member('dog')" => sub {
ok eval{ hash_member('dog'); }, "hash_member('dog') called as expected"
or note $@;
};
subtest "hash_member('fish')" => sub {
ok !eval{ hash_member('fish');}, "hash_member('fish') not called (as expected)";
note $@;
};
};
subtest 'where where where' => sub {
no if $] >= 5.017011, warnings => 'experimental::smartmatch';
plan tests => 14;
func is_prime ($x) {
return $x ~~ [2,3,5,7,11];
}
func neg_and_odd_and_prime ($x where [0..10] where { $x % 2 } where \&is_prime ) {
ok $x ~~ [3,5,7], '$x had acceptable value';
return 1;
}
for my $n (-1..11) {
subtest "neg_and_odd_and_prime($n)" => sub {
local $@;
my $result = eval{ neg_and_odd_and_prime($n); };
my $error = $@;
if (defined $result) {
pass "neg_and_odd_and_prime($n) as expected";
}
else {
like $error, qr{\$x value \("$n"\) does not satisfy constraint:}
=> "neg_and_odd_and_prime($n) as expected";
note $@;
}
};
}
# try an undef value
my $result = eval{ neg_and_odd_and_prime(undef); };
like $@, qr{\$x value \(undef\) does not satisfy constraint:}, "neg_and_odd_and_prime(undef) as expected";
};
done_testing;
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