Bug: rendering actually well-formed JSON.

Author: dblock

lib/grape/middleware/error.rb

@@ -36,7 +36,7 @@ def formatter_for(api_format)
       end
 
       def format_json(message)
-        { :error => message }
+        { :error => message }.to_json
       end
 
       def format_txt(message)

spec/grape/api_spec.rb

@@ -507,7 +507,7 @@ def two
         raise "rain!"
       end    
       get '/exception'
-      last_response.body.should eql '{:error=>"rain!"}'
+      last_response.body.should eql '{"error":"rain!"}'
     end
     it 'should rescue all errors' do
       subject.error_format :txt
@@ -523,7 +523,7 @@ def two
         error!("Access Denied", 401)
       end    
       get '/error'
-      last_response.body.should eql '{:error=>"Access Denied"}'
+      last_response.body.should eql '{"error":"Access Denied"}'
     end
   end
 

spec/grape/middleware/exception_spec.rb

@@ -65,7 +65,7 @@ def app
       run ExceptionApp
     end
     get '/'
-    last_response.body.should == '{:error=>"rain!"}'
+    last_response.body.should == '{"error":"rain!"}'
   end
 
   it 'should be possible to specify a custom formatter' do