Fix JSON::ParserError in CEP implementation. The lack of tests was th…

…e origin.

api.rb

@@ -86,22 +86,25 @@ def as_json
 
 
     def result 
-      if valid?
-        return check if json.include?("localidade")
+      if valid? && valid_json?
+        json = JSON.parse(body)
+        return json if json.include?("localidade")
         return false
       else
         false
       end
     end
 
-
-    def check
-      request = Net::HTTP.get_response(request_uri)
-      json = JSON.parse(request.body)
-      return json
+    def valid_json?
+      JSON.parse(response_body)
+      return true
       rescue JSON::ParserError
         return false
     end
+
+    def response_body
+      Net::HTTP.get_response(request_uri).body
+    end
 
     def valid?
       @cep.length == 8