# -*- mode: perl; -*-
use strict;
use warnings;
use Test::More tests => 137;
###############################################################################
# Read and load configuration file and backend library.
use Config::Tiny ();
my $config_file = 'xt/author/lib.ini';
my $config = Config::Tiny -> read('xt/author/lib.ini')
  or die Config::Tiny -> errstr();
# Read the library to test.
our $LIB = $config->{_}->{lib};
die "No library defined in file '$config_file'"
  unless defined $LIB;
die "Invalid library name '$LIB' in file '$config_file'"
  unless $LIB =~ /^[A-Za-z]\w*(::\w+)*\z/;
# Load the library.
eval "require $LIB";
die $@ if $@;
###############################################################################
can_ok($LIB, '_check');
# Generate test data.
my @data;
push @data, ([ "$LIB->_zero()", 1 ],      # valid objects
             [ "$LIB->_one()",  1 ],
             [ "$LIB->_two()",  1 ],
             [ "$LIB->_ten()",  1 ]);
for (my $n = 0 ; $n <= 24 ; ++ $n) {
    push @data, [ qq|$LIB->_new("1| . ("0" x $n) . qq|")|, 1 ];
}
push @data, ([ "undef",         0 ],      # invalid objects
             [ "''",            0 ],
             [ "1",             0 ],
             [ "[]",            0 ],
             [ "{}",            0 ]);
# List context.
for (my $i = 0 ; $i <= $#data ; ++ $i) {
    my ($in0, $out0) = @{ $data[$i] };
    my ($x, @got);
    my $test = qq|\$x = $in0; |
             . qq|\@got = $LIB->_check(\$x);|;
    diag("\n$test\n\n") if $ENV{AUTHOR_DEBUGGING};
    eval $test;
    is($@, "", "'$test' gives emtpy \$\@");
    subtest "_check() in list context: $test", sub {
        plan tests => 3,
        cmp_ok(scalar @got, "==", 1,
               "'$test' gives one output arg");
        is(ref($got[0]), "",
           "'$test' output arg is a scalar");
        if ($out0) {                    # valid object
            ok(! $got[0], "'$test' output arg is false (object OK)")
              or diag("       got: $got[0]\n  expected: (something false)");
        } else {                        # invalid object
            ok($got[0], "'$test' output arg is true (object not OK)")
              or diag("       got: $got[0]\n  expected: (something true)");
        }
    };
}
# Scalar context.
for (my $i = 0 ; $i <= $#data ; ++ $i) {
    my ($in0, $out0) = @{ $data[$i] };
    my ($x, $got);
    my $test = qq|\$x = $in0; |
             . qq|\$got = $LIB->_check(\$x);|;
    diag("\n$test\n\n") if $ENV{AUTHOR_DEBUGGING};
    eval $test;
    is($@, "", "'$test' gives emtpy \$\@");
    subtest "_check() in scalar context: $test", sub {
        plan tests => 2,
        is(ref($got), "",
           "'$test' output arg is a scalar");
        if ($out0) {                    # valid object
            ok(! $got, "'$test' output arg is false (object OK)")
              or diag("       got: $got\n  expected: (something false)");
        } else {                        # invalid object
            ok($got, "'$test' output arg is true (object not OK)")
              or diag("       got: $got\n  expected: (something true)");
        }
    };
}