Hey folks, I am writing tests for perl and what I am after is validating a JSON structure. I stumbled across the module JSON::Schema but it doesn't actually seem to check the Schema. Just be sure I am seeing what I am seeing I submit to you enlightened monks...... 
#!/usr/bin/perl
use JSON;
use JSON::Schema;

# Here's a structure to validate against...
my $json_model ={
        type => 'object',
        properties => {
                year    => {type=>'number', minimum=>0, maximum=>9999}
+,
                month   => {type=>'number', minimum=>1, maximum=>12},
                }
        };

#And now here's some bad data. monkeys do not belong (silly monkeys!)
my $test = to_json({
        year => '1999',
        monkeys => '10'
});

my $validator = JSON::Schema->new($json_model);

# Validate:
my $valid = $validator->validate($test);
if ($valid)
{
  print "Yay!\n";
  exit;
}

# But it's not valid...
foreach my $e ($valid->errors)
{
  print "Naughty! $e\n";
}

[download]
I have defined the structure to validate against but clearly $test, with its "monkeys" element clearly does not fit but it seems to validate just fine. Can anyone verify this? Also do you have a suggestion for validating a JSON structure since JSON::Schema seems to be ..... errrr .... unreliable? reliable and I'm missing something.

Many many thanks!
JC

PS - In cases where the structures do match, JSON::Schema seems to be excellent catching it.

In reply to Validating a JSON structure by sherab

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