[FEATURE REQ][Synapse] - Improve test coverage

[idear1203]

Library or service name.
What library or service is this request related to? [e.g. Azure.Storage.Blobs]
[Microsoft.Azure.Management.Synapse]

Is your feature request related to a problem? Please describe.
What feature would you like to get added? What problem is it solving?
Currently we only have test cases for core features. We need to improve test coverage.

[pallavit]

Closing this issue as it is not being actively worked upon, please feel free to open as needed.