Create executor, which simply runs the operation

lib/batch_api/processor/executor.rb

@@ -0,0 +1,18 @@
+module BatchApi
+  class Processor
+    # Public: a simple middleware that lives at the end of the internal chain
+    # and simply executes each batch operation.
+    class Executor
+
+      # Public: initialize the middleware.
+      def initialize(app)
+        @app = app
+      end
+
+      # Public: execute the batch operation.
+      def call(env)
+        env[:op].execute
+      end
+    end
+  end
+end

spec/lib/processor/executor_spec.rb

@@ -0,0 +1,22 @@
+require 'spec_helper'
+require 'batch_api/processor/executor'
+
+describe BatchApi::Processor::Executor do
+
+  let(:app) { stub("app", call: stub) }
+  let(:executor) { BatchApi::Processor::Executor.new(app) }
+  let(:result) { stub("result") }
+  let(:op) { stub("operation", execute: result) }
+  let(:env) { {op: op} }
+
+  describe "#call" do
+    it "executes the operation" do
+      op.should_receive(:execute)
+      executor.call(env)
+    end
+
+    it "returns the result" do
+      executor.call(env).should == result
+    end
+  end
+end