Responses should be returned in the middlewares as Rack arrays

lib/batch_api/processor/executor.rb

@@ -11,7 +11,7 @@ def initialize(app)
 
       # Public: execute the batch operation.
       def call(env)
-        env[:op].execute
+        env[:op].execute.to_rack
       end
     end
   end

lib/batch_api/response.rb

@@ -15,6 +15,11 @@ def initialize(response)
       @body = process_body(response[2])
     end
 
+
+    def to_rack
+      [status, headers, body]
+    end
+
     private
 
     def process_body(body_pieces)

spec/lib/processor/executor_spec.rb

@@ -5,7 +5,8 @@
 
   let(:app) { stub("app", call: stub) }
   let(:executor) { BatchApi::Processor::Executor.new(app) }
-  let(:result) { stub("result") }
+  let(:rack) { stub("rack array") }
+  let(:result) { stub("result", to_rack: rack) }
   let(:op) { stub("operation", execute: result) }
   let(:env) { {op: op} }
 
@@ -15,8 +16,8 @@
       executor.call(env)
     end
 
-    it "returns the result" do
-      executor.call(env).should == result
+    it "returns the result as a Rack array" do
+      executor.call(env).should == result.to_rack
     end
   end
 end

spec/lib/response_spec.rb

@@ -24,4 +24,14 @@
   it "sets headers to the HTTP headers" do
     response.headers.should == raw_response[1]
   end
+
+  describe "#to_rack" do
+    it "returns a Rack-compatible array" do
+      response.to_rack.should == [
+        response.status,
+        response.headers,
+        response.body
+      ]
+    end
+  end
 end