describe regions implementation

lib/fog/aws/ec2.rb

@@ -19,6 +19,7 @@ require "#{parsers_directory}/describe_availability_zones"
 require "#{parsers_directory}/describe_images"
 require "#{parsers_directory}/describe_instances"
 require "#{parsers_directory}/describe_key_pairs"
+require "#{parsers_directory}/describe_regions"
 require "#{parsers_directory}/describe_security_groups"
 require "#{parsers_directory}/describe_snapshots"
 require "#{parsers_directory}/describe_volumes"
@@ -49,7 +50,7 @@ require "#{requests_directory}/describe_availability_zones"
 require "#{requests_directory}/describe_images"
 require "#{requests_directory}/describe_instances"
 require "#{requests_directory}/describe_key_pairs"
-# TODO: require "#{requests_directory}/describe_regions"
+require "#{requests_directory}/describe_regions"
 # TODO: require "#{requests_directory}/describe_reserved_instances"
 # TODO: require "#{requests_directory}/describe_reserved_instances_offerings"
 require "#{requests_directory}/describe_security_groups"

lib/fog/aws/parsers/ec2/describe_regions.rb

@@ -0,0 +1,32 @@
+module Fog
+  module Parsers
+    module AWS
+      module EC2
+
+        class DescribeRegions < Fog::Parsers::Base
+
+          def reset
+            @region = {}
+            @response = { :region_info => [] }
+          end
+
+          def end_element(name)
+            case name
+            when 'item'
+              @response[:region_info] << @region
+              @region = {}
+            when 'regionEndpoint'
+              @region[:region_endpoint] = @value
+            when 'regionName'
+              @region[:region_name] = @value
+            when 'requestId'
+              @response[:request_id] = @value
+            end
+          end
+
+        end
+
+      end
+    end
+  end
+end

lib/fog/aws/requests/ec2/describe_regions.rb

@@ -0,0 +1,26 @@
+module Fog
+  module AWS
+    class EC2
+
+      # Describe all or specified regions
+      #
+      # ==== Params
+      # * region_name<~String> - List of regions to describe, defaults to all
+      #
+      # ==== Returns
+      # * response<~Fog::AWS::Response>:
+      #   * body<~Hash>:
+      #     * :request_id<~String> - Id of request
+      #     * :region_info<~Array>:
+      #       * :region_name<~String> - Name of region
+      #       * :region_endpoint<~String> - Service endpoint for region
+      def describe_regions(region_name = [])
+        params = indexed_params('RegionName', region_name)
+        request({
+          'Action' => 'DescribeRegions'
+        }.merge!(params), Fog::Parsers::AWS::EC2::DescribeRegions.new)
+      end
+
+    end
+  end
+end

spec/aws/ec2/describe_regions_spec.rb

@@ -0,0 +1,19 @@
+require File.dirname(__FILE__) + '/../../spec_helper'
+
+describe 'EC2.describe_availability_zones' do
+
+  it "should return proper attributes with no params" do
+    actual = ec2.describe_regions
+    zone = actual.body[:region_info].first
+    zone[:region_endpoint].should be_a(String)
+    zone[:region_name].should be_a(String)
+  end
+
+  it "should return proper attribute with params" do
+    actual = ec2.describe_regions(['us-east-1'])
+    zone = actual.body[:region_info].first
+    zone[:region_endpoint].should be_a(String)
+    zone[:region_name].should be_a(String)
+  end
+
+end