Add unit tests for CLI commands

[MakMuftic]

Based on tests added by @mpetrun5 in this PR - we should do the same for all our CLI commands.

This would test our flag validation/processing logic, flag binding, and also command execution function.

Implementation details

A sample of these unit tests can be found in PR mentioned previously.

Before we start implementing this issue - first we should decide if we want to:

• define a global interface for each contract (this would hold all available methods for the specific contract)
• for each CLI command define a specialized interface that only defines a subset of methods being used in that command (this approach was used in previosuly mentioned PR)

Testing details

Make sure to check each component is working properly when writing tests: validation function, processing function, flag binding, command execution.

Acceptance Criteria

• add unit tests for each CLI command
• test all previously mentioned parts for each CLI command

[itsbobbyzzz168]

No longer relevant. Closing