JSON pointers: "/" and "~" are not escaped

[olofheurgren]

Hi!

The RFC for JSON Pointer states that:

Because the characters '~' (%x7E) and '/' (%x2F) have special meanings in JSON Pointer, '~' needs to be encoded as '~0' and '/' needs to be encoded as '~1' when these characters appear in a reference token.

but it seems this is not done for the JSON pointers included in the return value of validate.

For instance, this code:

schemer = JSONSchemer.schema(
  {'type' => 'object',
   'properties' => {
     'foo/bar~' => {
       'type' => 'string'}}}
)
schemer.validate({'foo/bar~' => 1}).to_a

returns:

[{"data"=>1,
  "data_pointer"=>"/foo/bar~",
  "schema"=>{"type"=>"string"},
  "schema_pointer"=>"/properties/foo/bar~",
  "root_schema"=>{"type"=>"object", "properties"=>{"foo/bar~"=>{"type"=>"string"}}},
  "type"=>"string"}]

but according to the RFC, the value of "data_pointer" should be:

"/foo~1bar~0"

and the value of "schema_pointer" should be

"/properties/foo~1bar~0"

[davishmcclurg]

Thanks for opening the issue @olofheurgren! Good catch.

I opened a fix: #122