refactor: move scan/mod.rs to scan/tests.rs and scan/test_utils.rs

[aleksandarskrbic]

What changes are proposed in this pull request?

Fixes: #1370

How was this change tested?

[codecov]

Codecov Report

❌ Patch coverage is 98.78935% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.76%. Comparing base (3bcd274) to head (1d5c0c5).

Files with missing lines	Patch %	Lines
kernel/src/scan/tests.rs	98.39%	2 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1485      +/-   ##
==========================================
- Coverage   84.76%   84.76%   -0.01%     
==========================================
  Files         122      124       +2     
  Lines       33032    33027       -5     
  Branches    33032    33027       -5     
==========================================
- Hits        28000    27995       -5     
  Misses       3659     3659              
  Partials     1373     1373              

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[nicklan]

thanks, this lgtm. could you briefly say why you moved some stuff to test_utils.rs? I see that they are utility functions, but unless they are used in other test modules, I'd just put them all in tests.rs.

[aleksandarskrbic]

thanks, this lgtm. could you briefly say why you moved some stuff to test_utils.rs? I see that they are utility functions, but unless they are used in other test modules, I'd just put them all in tests.rs.

@nicklan I've added them to test utils since some of those methods are used in state and log_replay module