From d5fd93cc5c781c3531551a54c8675cfe87390be4 Mon Sep 17 00:00:00 2001
From: Eugene Howe <eugene@xtreme-computers.net>
Date: Tue, 24 Mar 2015 14:06:22 -0400
Subject: [PATCH] mock DescribeDBEngineVersions

---
 lib/fog/aws/rds.rb                               | 16 ++++++++++++++++
 .../requests/rds/describe_db_engine_versions.rb  |  9 ++++++++-
 tests/requests/rds/db_engine_versions.rb         |  7 +++++++
 tests/requests/rds/helper.rb                     | 14 ++++++++++++++
 4 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 tests/requests/rds/db_engine_versions.rb

diff --git a/lib/fog/aws/rds.rb b/lib/fog/aws/rds.rb
index 1b33eed06..4a3abeda8 100644
--- a/lib/fog/aws/rds.rb
+++ b/lib/fog/aws/rds.rb
@@ -101,6 +101,22 @@ module Fog
                 :subnet_groups       => {},
                 :snapshots           => {},
                 :event_subscriptions => {},
+                :db_engine_versions  => [
+                  {
+                    'Engine'                     => "mysql",
+                    'DBParameterGroupFamily'     => "mysql5.1",
+                    'DBEngineDescription'        => "MySQL Community Edition",
+                    'EngineVersion'              => "5.1.57",
+                    'DBEngineVersionDescription' => "MySQL 5.1.57"
+                  },
+                  {
+                    'Engine'                     => "postgres",
+                    'DBParameterGroupFamily'     => "postgres9.3",
+                    'DBEngineDescription'        => "PostgreSQL",
+                    'EngineVersion'              => "9.3.5",
+                    'DBEngineVersionDescription' => "PostgreSQL 9.3.5"
+                  },
+                ],
                 :parameter_groups    => {
                   "default.mysql5.1" => {
                     "DBParameterGroupFamily" => "mysql5.1",
diff --git a/lib/fog/aws/requests/rds/describe_db_engine_versions.rb b/lib/fog/aws/requests/rds/describe_db_engine_versions.rb
index 491c0e07f..b0fbbb2a6 100644
--- a/lib/fog/aws/requests/rds/describe_db_engine_versions.rb
+++ b/lib/fog/aws/requests/rds/describe_db_engine_versions.rb
@@ -22,7 +22,14 @@ module Fog
 
       class Mock
         def describe_db_engine_versions(opts={})
-          Fog::Mock.not_implemented
+          response = Excon::Response.new
+
+          response.status = 200
+          response.body = {
+            "ResponseMetadata"               => { "RequestId"        => Fog::AWS::Mock.request_id },
+            "DescribeDBEngineVersionsResult" => { "DBEngineVersions" => self.data[:db_engine_versions] }
+          }
+          response
         end
       end
     end
diff --git a/tests/requests/rds/db_engine_versions.rb b/tests/requests/rds/db_engine_versions.rb
new file mode 100644
index 000000000..2c93b6aa2
--- /dev/null
+++ b/tests/requests/rds/db_engine_versions.rb
@@ -0,0 +1,7 @@
+Shindo.tests('AWS::RDS | describe db engine versions', ['aws', 'rds']) do
+  tests('success') do
+    tests("#describe_db_engine_versions").formats(AWS::RDS::Formats::DB_ENGINE_VERSIONS_LIST) do
+      Fog::AWS[:rds].describe_db_engine_versions.body
+    end
+  end
+end
diff --git a/tests/requests/rds/helper.rb b/tests/requests/rds/helper.rb
index df28475d3..6ac5dec53 100644
--- a/tests/requests/rds/helper.rb
+++ b/tests/requests/rds/helper.rb
@@ -291,6 +291,20 @@ class AWS
           'EventSubscriptionsList' => [EVENT_SUBSCRIPTION]
         }
       }
+
+      DB_ENGINE_VERSION = {
+        'Engine'                     => String,
+        'DBParameterGroupFamily'     => String,
+        'DBEngineDescription'        => String,
+        'EngineVersion'              => String,
+        'DBEngineVersionDescription' => String
+      }
+
+      DB_ENGINE_VERSIONS_LIST = BASIC.merge(
+        'DescribeDBEngineVersionsResult' => {
+          'DBEngineVersions' => [DB_ENGINE_VERSION]
+        }
+      )
     end
   end
 end