json-spec.rb

# examples
 
spec = {
  "apiKey" => String,
  "language" => ["en", "ru"],
  "clientData" => {
    "userName" => String,
    "userCity" => String,
    "userPhoneNo" => String,
    "userPassword" => String
  }
}
 
 
 
example = {
  "apiKey" => "api key",
  "language" => "en",
  "clientData" => {
    "userName" => "dr_toboggan",
    "userCity" => "Philly",
    "userPhoneNo" => "phone number here",
    "userPassword" => "you got the virus"
  }
}
 
 
 
example2 = {
  "apiKey" => "api key",
  "language" => "fr",
  "clientData" => {
    "userName" => "dr_toboggan",
    "userCity" => "Philly",
    "userPhoneNo" => "phone number here",
    "userPassword" => "you got the virus"
  }
}
 

def match(spec, example)
  return false unless spec.keys == example.keys

  spec.each do |key, val|

    case val
    when Hash
      if example[key].is_a? Hash
        return false unless match(val, example[key])
      else
        return false
      end
    when Array
      # alternation
      return false unless val.include?(example[key])
    else
      return false unless example[key].is_a?(val)
    end

  end

  true
end
 
p match(spec, example) # => true
p match(spec, example2) # => false