add support for AWS Data Pipeline's GetPipelineDefinition endpoint

http://docs.aws.amazon.com/datapipeline/latest/APIReference/API_GetPipelineDefinition.html

lib/fog/aws/data_pipeline.rb

@@ -15,6 +15,7 @@ module Fog
       request :describe_pipelines
       request :list_pipelines
       request :put_pipeline_definition
+      request :get_pipeline_definition
 
       model_path 'fog/aws/models/data_pipeline'
       model       :pipeline

lib/fog/aws/requests/data_pipeline/get_pipeline_definition.rb

@@ -0,0 +1,37 @@
+module Fog
+  module AWS
+    class DataPipeline
+
+      class Real
+
+        # Get pipeline definition JSON
+        # http://docs.aws.amazon.com/datapipeline/latest/APIReference/API_GetPipelineDefinition.html
+        # ==== Parameters
+        # * PipelineId <~String> - The ID of the pipeline
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        def get_pipeline_definition(id)
+          params = {
+            'pipelineId' => id,
+          }
+
+          response = request({
+            :body => Fog::JSON.encode(params),
+            :headers => { 'X-Amz-Target' => 'DataPipeline.GetPipelineDefinition' },
+          })
+
+          Fog::JSON.decode(response.body)
+        end
+
+      end
+
+      class Mock
+        def get_pipeline_definition(id, objects)
+          Fog::Mock.not_implemented
+        end
+      end
+
+    end
+  end
+end

tests/aws/requests/data_pipeline/helper.rb

@@ -38,7 +38,23 @@ class AWS
         "errored" => Fog::Boolean,
         "validationErrors" => Fog::Nullable::Array,
       }
-	
+
+      GET_PIPELINE_DEFINITION = {
+        "pipelineObjects" => [
+          {
+            "id" => String,
+            "name" => String,
+            "fields" => [
+              {
+                "key" => String,
+                "refValue" => Fog::Nullable::String,
+                "stringValue" => Fog::Nullable::String,
+              }
+            ]
+          }
+        ]
+      }
+
     end
   end
 end

tests/aws/requests/data_pipeline/pipeline_tests.rb

@@ -46,6 +46,10 @@ Shindo.tests('AWS::DataPipeline | pipeline_tests', ['aws', 'data_pipeline']) do
       Fog::AWS[:data_pipeline].activate_pipeline(@pipeline_id)
     end
 
+    tests("#get_pipeline_definition").formats(AWS::DataPipeline::Formats::GET_PIPELINE_DEFINITION) do
+      Fog::AWS[:data_pipeline].get_pipeline_definition(@pipeline_id)
+    end
+
     tests("#delete_pipeline").returns(true) do
       Fog::AWS[:data_pipeline].delete_pipeline(@pipeline_id)
     end