rackspace delete stack op and unit test
diff --git a/rackspace/orchestration/v1/stacks/delegate_test.go b/rackspace/orchestration/v1/stacks/delegate_test.go
index 5055213..452a5ba 100644
--- a/rackspace/orchestration/v1/stacks/delegate_test.go
+++ b/rackspace/orchestration/v1/stacks/delegate_test.go
@@ -389,3 +389,12 @@
 	err := Update(fake.ServiceClient(), "gophercloud-test-stack-2", "db6977b2-27aa-4775-9ae7-6213212d4ada", updateOpts).ExtractErr()
 	th.AssertNoErr(t, err)
 }
+
+func TestDeleteStack(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	os.HandleDeleteSuccessfully(t)
+
+	err := Delete(fake.ServiceClient(), "gophercloud-test-stack-2", "db6977b2-27aa-4775-9ae7-6213212d4ada").ExtractErr()
+	th.AssertNoErr(t, err)
+}