refactor: refactor test module

[slievrly]

• I have read the CONTRIBUTING.md guidelines.
• I have registered the PR changes.

Ⅰ. Describe what this PR did

reactor test module

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.41%. Comparing base (6614996) to head (d604016).

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #7698      +/-   ##
============================================
+ Coverage     61.40%   61.41%   +0.01%     
  Complexity      680      680              
============================================
  Files          1314     1314              
  Lines         49890    49890              
  Branches       5878     5878              
============================================
+ Hits          30634    30640       +6     
+ Misses        16469    16463       -6     
  Partials       2787     2787              

see 2 files with indirect coverage changes

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