add test

[loongs-zhang]

// Describe your PR here; eg. Fixes #issueNo

Make sure that:

• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.44%. Comparing base (11c2c3a) to head (2cbf291).

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #344       +/-   ##
===========================================
+ Coverage   55.12%   67.44%   +12.32%     
===========================================
  Files          68       64        -4     
  Lines        5101     4089     -1012     
===========================================
- Hits         2812     2758       -54     
+ Misses       2289     1331      -958     

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