cmds/cbfs: add smoke tests to CLI command

[binjip978]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 56.52174% with 10 lines in your changes missing coverage. Please review.

Project coverage is 34.22%. Comparing base (54e4adf) to head (6fd7649).

Files with missing lines	Patch %	Lines
cmds/cbfs/cbfs.go	56.52%	9 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #442      +/-   ##
==========================================
+ Coverage   34.00%   34.22%   +0.21%     
==========================================
  Files         209      209              
  Lines       14084    14087       +3     
==========================================
+ Hits         4789     4821      +32     
+ Misses       8412     8377      -35     
- Partials      883      889       +6     

Flag	Coverage Δ
	34.22% <56.52%> (+0.21%)	⬆️

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