Add more tests for ResultSet Scan

[haoxins]

deps #305

What type of PR is this?

• bug
• feature
• enhancement

What problem(s) does this PR solve?

Issue(s) number:

Description:

How do you solve it?

Special notes for your reviewer, ex. impact of this fix, design document, etc:

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5554785) 63.37% compared to head (8dcb2f3) 63.37%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #304   +/-   ##
=======================================
  Coverage   63.37%   63.37%           
=======================================
  Files           9        9           
  Lines        2452     2452           
=======================================
  Hits         1554     1554           
  Misses        768      768           
  Partials      130      130           

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[Nicole00]

the cla is not passed, could you please make some re-push to trigger the cla?

[wey-gu]

the cla is not passed, could you please make some re-push to trigger the cla?

Maybe the commit author is not the one @haoxins you already used?

[haoxins]

the cla is not passed, could you please make some re-push to trigger the cla?

Done~