add ax_unit_snippets

Author: sjuergen

README.md

@@ -13,6 +13,13 @@ apax add @simatic-ax/snippetscollection
 
 ## AXUnitSupport
 
+### Create a test fixture with AxUnit.Assert
+```json
+"prefix": ["AxUnit test-fixture"]
+```
+
+
+
 ### Insert Using AxUnit.Assert
 ```json
 "prefix": ["AxUnit, using ax"]