Adding a unit test for list_mfa_devices. Also, fixed parsing of EnableData to use Time.parse

lib/fog/aws/iam.rb

@@ -95,6 +95,11 @@ module Fog
                 "Status" => "Active",
                 "AccessKeyId" => key
               }],
+              :devices => [{
+                :enable_date   => Time.now,
+                :serial_number => 'R1234',
+                :user_name     => 'Bob'
+              }],
               :users => Hash.new do |uhash, ukey|
                 uhash[ukey] = {
                   :user_id     => Fog::AWS::Mock.key_id,

lib/fog/aws/parsers/iam/list_mfa_devices.rb

@@ -12,8 +12,10 @@ module Fog
 
           def end_element(name)
             case name
-            when 'EnableDate', 'SerialNumber', 'UserName'
+            when 'SerialNumber', 'UserName'
               @mfa_device[name] = value
+            when 'EnableDate'
+              @mfa_device[name] = Time.parse(value)
             when 'member'
               @response['MFADevices'] << @mfa_device
               @mfa_device = {}

tests/aws/requests/iam/mfa_tests.rb

@@ -0,0 +1,23 @@
+Shindo.tests('AWS::IAM | mfa requests', ['aws']) do
+
+  tests('success') do
+    @mfa_devices_format = {
+      'MFADevices' => [{
+        'EnableDate'    => Time,
+        'SerialNumber'  => String,
+        'UserName'      => String
+      }],
+      'IsTruncated' => Fog::Boolean,
+      'RequestId'   => String
+    }
+
+    tests('#list_mfa_devices').formats(@mfa_devices_format) do
+      Fog::AWS[:iam].list_mfa_devices.body
+    end
+  end
+
+  tests('failure') do
+    test('failing conditions')
+  end
+
+end