Unittest for post_container.dart

[nidhin29]

This change included the Unittest for post_container

Issue Number: #2153

Fixed #2153

Did you add tests for your changes?

Yes

Summary

It is unittest for post_container.

Does this PR introduce a breaking change?

No, this does not introduce any major changes to the codebase.

Have you read the contributing guide?

Yes, i have followed the guidelines.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b548497) 76.43% compared to head (3bd526a) 80.14%.
Report is 48 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2186      +/-   ##
===========================================
+ Coverage    76.43%   80.14%   +3.71%     
===========================================
  Files          152      149       -3     
  Lines         7438     6970     -468     
===========================================
- Hits          5685     5586      -99     
+ Misses        1753     1384     -369     

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[noman2002]

Good work @nidhin29.

[nidhin29]

@noman2002 Thank you Sir