Ensure the validator can handle the payload being JSON

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 4.4.1
+
+* Fix `Validator` module to handle JSON or other object types being passed as the payload ([#68](https://github.com/alphagov/govuk_schemas/pull/68))
+
 # 4.4.0
 
 * Adds support for applications that use Minitest by adding an `AssertMatchers` module ([#66](https://github.com/alphagov/govuk_schemas/pull/66))

lib/govuk_schemas/validator.rb

@@ -1,11 +1,12 @@
 module GovukSchemas
   class Validator
-    attr_reader :schema_name, :type, :payload
+    attr_reader :schema_name, :type
+    attr_accessor :payload
 
     def initialize(schema_name, type, payload)
       @schema_name = schema_name
       @type = type
-      @payload = payload
+      @payload = ensure_json(payload)
     end
 
     def valid?
@@ -27,20 +28,24 @@ def error_message
 
     def errors
       schema = Schema.find("#{type}_schema": schema_name)
-      validator = JSON::Validator.fully_validate(schema, payload.to_json)
+      validator = JSON::Validator.fully_validate(schema, payload)
       validator.map { |message| "- " + humanized_error(message) }.join("\n")
     end
 
     def formatted_payload
-      return payload if payload.is_a?(String)
-
-      JSON.pretty_generate(payload)
+      JSON.pretty_generate(JSON.parse(payload))
     end
 
     def humanized_error(message)
       message.gsub("The property '#/'", "The item")
              .gsub(/in schema [0-9a-f\-]+/, "")
              .strip
     end
+
+    def ensure_json(payload)
+      return payload if payload.is_a?(String)
+
+      payload.to_json
+    end
   end
 end

lib/govuk_schemas/version.rb

@@ -1,4 +1,4 @@
 module GovukSchemas
   # @private
-  VERSION = "4.4.0".freeze
+  VERSION = "4.4.1".freeze
 end

spec/lib/validator_spec.rb

@@ -16,6 +16,13 @@
 
       expect(validator.valid?).to eq false
     end
+
+    it "handles the payload being passed as json" do
+      example = GovukSchemas::RandomExample.for_schema(publisher_schema: "placeholder").to_json
+      validator = described_class.new("placeholder", "publisher", example)
+
+      expect(validator.valid?).to eq true
+    end
   end
 
   describe "#error_message" do