2 files changed, 9 insertions, 12 deletions
diff --git a/actionpack/lib/action_dispatch/testing/assertion_response.rb b/actionpack/lib/action_dispatch/testing/assertion_response.rb
index 3fb81ff083..404b96bbcd 100644
--- a/actionpack/lib/action_dispatch/testing/assertion_response.rb
+++ b/actionpack/lib/action_dispatch/testing/assertion_response.rb
@@ -1,14 +1,7 @@
 module ActionDispatch
-  # This is a class that abstracts away an asserted response.
-  # It purposely does not inherit from Response, because it doesn't need it.
-  # That means it does not have headers or a body.
-  #
-  # As an input to the initializer, we take a Fixnum, a String, or a Symbol.
-  # If it's a Fixnum or String, we figure out what its symbolized name.
-  # If it's a Symbol, we figure out what its corresponding code is.
-  # The resulting code will be a Fixnum, for real HTTP codes, and it will
-  # be a String for the pseudo-HTTP codes, such as:
-  #   :success, :missing, :redirect and :error
+  # This is a class that abstracts away an asserted response. It purposely
+  # does not inherit from Response because it doesn't need it. That means it
+  # does not have headers or a body.
   class AssertionResponse
     attr_reader :code, :name
 
@@ -19,6 +12,9 @@ module ActionDispatch
       error: "5XX"
     }
 
+    # Accepts a specific response status code as an Integer (404) or String
+    # ('404') or a response status range as a Symbol pseudo-code (:success,
+    # indicating any 200-299 status code).
     def initialize(code_or_name)
       if code_or_name.is_a?(Symbol)
         @name = code_or_name
diff --git a/actionpack/lib/action_dispatch/testing/integration.rb b/actionpack/lib/action_dispatch/testing/integration.rb
index 384254b131..8777666f9f 100644
--- a/actionpack/lib/action_dispatch/testing/integration.rb
+++ b/actionpack/lib/action_dispatch/testing/integration.rb
@@ -300,7 +300,7 @@ module ActionDispatch
           end
         end
 
-        REQUEST_KWARGS = %i(params headers env xhr)
+        REQUEST_KWARGS = %i(params headers env xhr as)
         def kwarg_request?(args)
           args[0].respond_to?(:keys) && args[0].keys.any? { |k| REQUEST_KWARGS.include?(k) }
         end
@@ -317,7 +317,8 @@ module ActionDispatch
               params: { id: 1 },
               headers: { 'X-Extra-Header' => '123' },
               env: { 'action_dispatch.custom' => 'custom' },
-              xhr: true
+              xhr: true,
+              as: :json
           MSG
         end