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=pod
=encoding utf-8
=head1 PURPOSE
Basic tests for B<Enum> from L<Types::Standard>.
=head1 AUTHOR
Toby Inkster E<lt>tobyink@cpan.orgE<gt>.
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2019-2023 by Toby Inkster.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
use strict;
use warnings;
use Test::More;
use Test::Fatal;
use Test::TypeTiny;
use Types::Standard qw( Enum );
isa_ok(Enum, 'Type::Tiny', 'Enum');
is(Enum->name, 'Enum', 'Enum has correct name');
is(Enum->display_name, 'Enum', 'Enum has correct display_name');
is(Enum->library, 'Types::Standard', 'Enum knows it is in the Types::Standard library');
ok(Types::Standard->has_type('Enum'), 'Types::Standard knows it has type Enum');
ok(!Enum->deprecated, 'Enum is not deprecated');
ok(!Enum->is_anon, 'Enum is not anonymous');
ok(Enum->can_be_inlined, 'Enum can be inlined');
is(exception { Enum->inline_check(q/$xyz/) }, undef, "Inlining Enum doesn't throw an exception");
ok(!Enum->has_coercion, "Enum doesn't have a coercion");
ok(Enum->is_parameterizable, "Enum is parameterizable");
is(Enum->type_default, undef, "Enum has no type_default");
#
# The @tests array is a list of triples:
#
# 1. Expected result - pass, fail, or xxxx (undefined).
# 2. A description of the value being tested.
# 3. The value being tested.
#
my @tests = (
fail => 'undef' => undef,
pass => 'false' => !!0,
pass => 'true' => !!1,
pass => 'zero' => 0,
pass => 'one' => 1,
pass => 'negative one' => -1,
pass => 'non integer' => 3.1416,
pass => 'empty string' => '',
pass => 'whitespace' => ' ',
pass => 'line break' => "\n",
pass => 'random string' => 'abc123',
pass => 'loaded package name' => 'Type::Tiny',
pass => 'unloaded package name' => 'This::Has::Probably::Not::Been::Loaded',
fail => 'a reference to undef' => do { my $x = undef; \$x },
fail => 'a reference to false' => do { my $x = !!0; \$x },
fail => 'a reference to true' => do { my $x = !!1; \$x },
fail => 'a reference to zero' => do { my $x = 0; \$x },
fail => 'a reference to one' => do { my $x = 1; \$x },
fail => 'a reference to empty string' => do { my $x = ''; \$x },
fail => 'a reference to random string' => do { my $x = 'abc123'; \$x },
fail => 'blessed scalarref' => bless(do { my $x = undef; \$x }, 'SomePkg'),
fail => 'empty arrayref' => [],
fail => 'arrayref with one zero' => [0],
fail => 'arrayref of integers' => [1..10],
fail => 'arrayref of numbers' => [1..10, 3.1416],
fail => 'blessed arrayref' => bless([], 'SomePkg'),
fail => 'empty hashref' => {},
fail => 'hashref' => { foo => 1 },
fail => 'blessed hashref' => bless({}, 'SomePkg'),
fail => 'coderef' => sub { 1 },
fail => 'blessed coderef' => bless(sub { 1 }, 'SomePkg'),
fail => 'glob' => do { no warnings 'once'; *SOMETHING },
fail => 'globref' => do { no warnings 'once'; my $x = *SOMETHING; \$x },
fail => 'blessed globref' => bless(do { no warnings 'once'; my $x = *SOMETHING; \$x }, 'SomePkg'),
fail => 'regexp' => qr/./,
fail => 'blessed regexp' => bless(qr/./, 'SomePkg'),
fail => 'filehandle' => do { open my $x, '<', $0 or die; $x },
fail => 'filehandle object' => do { require IO::File; 'IO::File'->new($0, 'r') },
fail => 'ref to scalarref' => do { my $x = undef; my $y = \$x; \$y },
fail => 'ref to arrayref' => do { my $x = []; \$x },
fail => 'ref to hashref' => do { my $x = {}; \$x },
fail => 'ref to coderef' => do { my $x = sub { 1 }; \$x },
fail => 'ref to blessed hashref' => do { my $x = bless({}, 'SomePkg'); \$x },
fail => 'object stringifying to ""' => do { package Local::OL::StringEmpty; use overload q[""] => sub { "" }; bless [] },
fail => 'object stringifying to "1"' => do { package Local::OL::StringOne; use overload q[""] => sub { "1" }; bless [] },
fail => 'object numifying to 0' => do { package Local::OL::NumZero; use overload q[0+] => sub { 0 }; bless [] },
fail => 'object numifying to 1' => do { package Local::OL::NumOne; use overload q[0+] => sub { 1 }; bless [] },
fail => 'object overloading arrayref' => do { package Local::OL::Array; use overload q[@{}] => sub { $_[0]{array} }; bless {array=>[]} },
fail => 'object overloading hashref' => do { package Local::OL::Hash; use overload q[%{}] => sub { $_[0][0] }; bless [{}] },
fail => 'object overloading coderef' => do { package Local::OL::Code; use overload q[&{}] => sub { $_[0][0] }; bless [sub { 1 }] },
#TESTS
);
while (@tests) {
my ($expect, $label, $value) = splice(@tests, 0 , 3);
if ($expect eq 'xxxx') {
note("UNDEFINED OUTCOME: $label");
}
elsif ($expect eq 'pass') {
should_pass($value, Enum, ucfirst("$label should pass Enum"));
}
elsif ($expect eq 'fail') {
should_fail($value, Enum, ucfirst("$label should fail Enum"));
}
else {
fail("expected '$expect'?!");
}
}
#
# Parameterize with some strings.
#
my $enum1 = Enum[qw/ foo bar bar baz /];
should_pass('foo', $enum1);
should_pass('bar', $enum1);
should_pass('baz', $enum1);
should_fail('bat', $enum1);
is_deeply($enum1->values, [qw/ foo bar bar baz /]);
is_deeply($enum1->unique_values, [qw/ bar baz foo /]);
is_deeply([@$enum1], [qw/ foo bar bar baz /]);
#
# Regexp.
#
my $re = $enum1->as_regexp;
ok('foo' =~ $re);
ok('bar' =~ $re);
ok('baz' =~ $re);
ok('FOO' !~ $re);
ok('xyz' !~ $re);
ok('foo bar baz' !~ $re);
my $re_i = $enum1->as_regexp('i'); # case-insensitive
ok('foo' =~ $re_i);
ok('bar' =~ $re_i);
ok('baz' =~ $re_i);
ok('FOO' =~ $re_i);
ok('xyz' !~ $re_i);
ok('foo bar baz' !~ $re_i);
like(
exception { $enum1->as_regexp('42') },
qr/Unknown regexp flags/,
'Unknown flags passed to as_regexp'
);
#
# Enum allows you to pass objects overloading stringification when
# creating the type, but rejects blessed objects (even overloaded)
# when checking values.
#
{
package Local::Stringy;
use overload q[""] => sub { ${$_[0]} };
sub new { my ($class, $str) = @_; bless \$str, $class }
}
my $enum2 = Enum[
map Local::Stringy->new($_), qw/ foo bar bar baz /
];
should_pass('foo', $enum2);
should_pass('bar', $enum2);
should_pass('baz', $enum2);
should_fail('bat', $enum2);
should_fail(Local::Stringy->new('foo'), $enum2);
is_deeply($enum2->values, [qw/ foo bar bar baz /]);
is_deeply($enum2->unique_values, [qw/ bar baz foo /]);
is_deeply([@$enum2], [qw/ foo bar bar baz /]);
#
# Enum-wise sorting
#
is_deeply(
[ $enum1->sort( 'baz', 'foo' ) ],
[ 'foo', 'baz' ],
'"foo" comes before "baz" because they were listed in that order when $enum1 was defined',
);
#
# Auto coercion
#
my $enum3 = Enum[ \1, qw( FOO BAR BAZ ) ];
is $enum3->coerce('FOO'), 'FOO';
is $enum3->coerce('foo'), 'FOO';
is $enum3->coerce('f'), 'FOO';
is $enum3->coerce('ba'), 'BAR';
is $enum3->coerce('baz'), 'BAZ';
is $enum3->coerce(0), 'FOO';
is $enum3->coerce(1), 'BAR';
is $enum3->coerce(2), 'BAZ';
is $enum3->coerce(-1), 'BAZ';
is $enum3->coerce('XYZ'), 'XYZ';
is_deeply $enum3->coerce([123]), [123];
#
# Manual coercion
#
my $enum4 = Enum[
[
Types::Standard::ArrayRef() => sub { 'FOO' },
Types::Standard::HashRef() => sub { 'BAR' },
Types::Standard::Str() => sub { 'BAZ' },
],
qw( FOO BAR BAZ )
];
is $enum4->coerce([]), 'FOO';
is $enum4->coerce({}), 'BAR';
is $enum4->coerce(''), 'BAZ';
done_testing;
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