fixed models and added tests

lib/fog/aws/models/cloud_watch/alarm_datum.rb

@@ -37,7 +37,7 @@ module Fog
           requires :threshold
 
           alarm_definition = {
-          		'AlarnName' => alarm_name,
+          		'AlarmName' => alarm_name,
           		'ComparisonOperator' => comparison_operator,
           		'EvaluationPeriods' => evaluation_periods,
           		'MetricName' => metric_name, 

lib/fog/aws/models/cloud_watch/alarms.rb

@@ -10,7 +10,7 @@ module Fog
 		
 		#alarm_names is an array of alarm names
         def delete(alarm_names)
-          connection.list_metrics(alarm_names)
+          connection.delete_alarms(alarm_names)
           true
         end
 

tests/aws/models/cloud_watch/alarm_history_tests.rb

@@ -0,0 +1,21 @@
+Shindo.tests("AWS::CloudWatch | alarm_histories", ['aws', 'cloudwatch']) do
+
+  tests('success') do
+    pending 
+    tests("#all").succeeds do
+      Fog::AWS[:cloud_watch].alarm_histories.all
+    end
+    
+	new_attributes = {
+      :alarm_name => 'tmp-alarm',
+      :end_date => '',
+      :history_item_type => 'StateUpdate',
+      :max_records => 1,
+      :start_date => ''
+    }
+    tests('#new').returns(new_attributes) do
+      Fog::AWS[:cloud_watch].alarm_histories.new(new_attributes).attributes
+    end
+  end
+
+end