Adds TooManyRequests (429) exception

lib/active_resource/base.rb

@@ -204,6 +204,7 @@ module ActiveResource
   # * 410 - ActiveResource::ResourceGone
   # * 412 - ActiveResource::PreconditionFailed
   # * 422 - ActiveResource::ResourceInvalid (rescued by save as validation errors)
+  # * 429 - ActiveResource::TooManyRequests
   # * 401..499 - ActiveResource::ClientError
   # * 500..599 - ActiveResource::ServerError
   # * Other - ActiveResource::ConnectionError

lib/active_resource/connection.rb

@@ -155,6 +155,8 @@ def handle_response(response)
           raise(PreconditionFailed.new(response))
         when 422
           raise(ResourceInvalid.new(response))
+        when 429
+          raise(TooManyRequests.new(response))
         when 401...500
           raise(ClientError.new(response))
         when 500...600

lib/active_resource/exceptions.rb

@@ -75,6 +75,10 @@ class ResourceGone < ClientError # :nodoc:
   class PreconditionFailed < ClientError # :nodoc:
   end
 
+  # 429 Too Many Requests
+  class TooManyRequests < ClientError # :nodoc:
+  end
+
   # 5xx Server Error
   class ServerError < ConnectionError # :nodoc:
   end

test/cases/connection_test.rb

@@ -95,6 +95,9 @@ def test_handle_response
     # 422 is a validation error
     assert_response_raises ActiveResource::ResourceInvalid, 422
 
+    # 429 is too many requests
+    assert_response_raises ActiveResource::TooManyRequests, 429
+
     # 4xx are client errors.
     [402, 499].each do |code|
       assert_response_raises ActiveResource::ClientError, code