Code-Structure.md

@@ -46,3 +46,14 @@ The cliclient.py module contains the _CliOsduClient _class that simplifies inter
 ## Testing
 
 Test cases are provided for certain functionality and are located under the _tests_ folder. Extending test coverage is an identified improvement area.
+
+### Testing of commands
+
+Testing of commands should include test cases for:
+- _CLI Interface_ - check that cli commands call the backend functions correctly.
+  - _test_cli_[xxx_]required_params()_ - for testing required parameters
+  - _test_cli_[xxx_]optional_params()_ - for testing default (optional) parameters
+  - _test_cli_xxx()_ - for testing specific combinations of parameters
+- _Function Tests_ - for testing specific functions.
+
+Not all tests adhere to the above convention yet. See _tests\commands\storage\test_add.py_ for an example.
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