Thanks again for sending the issue. However, can you check if SAPtoADZipper.Zip(List`1)
executes the mock(setup) if you run the test method in a group. You can use the "Debug all tests" and put a break-point in the particular method to investigate.
It could also be possible that the method is already invoked in some other test method; in that case you might like to check the following post:
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