add test cases

README.md

@@ -51,6 +51,21 @@ Exceptions:
 
 - Activate the module in the administration panel.
 
+## Occurrences (test cases)
+
+- from user_billing.tpl block extension
+  - form/user_checkout_noregistration.tpl
+    - checkout/user.tpl (no login && order without account)
+  - form/user_checkout_registration.tpl
+    - checkout/user.tpl (no login && create account)
+  - form/user_checkout_change.tpl
+    - checkout/user.tpl (logged in)
+  - form/register.tpl
+    - page/account/register.tpl
+  - form/user.tpl
+    - page/account/user.tpl
+- ... to be continued
+
 ## Uninstall
 
 Disable the module in administration area and delete the module folder.