add unittest on repr for LoadHVULabel and SampleFrames in loading.py

[congee524]

add repr unittest

[codecov]

Codecov Report

Merging #358 (6434c62) into master (25b88f1) will increase coverage by 0.37%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master     #358      +/-   ##
==========================================
+ Coverage   86.20%   86.58%   +0.37%     
==========================================
  Files          98       98              
  Lines        6924     6926       +2     
  Branches     1119     1120       +1     
==========================================
+ Hits         5969     5997      +28     
+ Misses        736      709      -27     
- Partials      219      220       +1     

Flag	Coverage Δ
unittests	86.57% <33.33%> (+0.37%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmaction/datasets/pipelines/loading.py	89.59% <33.33%> (+3.90%)	⬆️

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[dreamerlin]

#279 is an issue about the dataset preparation scripts rather than the dataset pipeline. The #279 should not be linked by this.

[dreamerlin]

And the repr is not tested completely. https://codecov.io/gh/open-mmlab/mmaction2/pull/358/src/mmaction/datasets/pipelines/loading.py?before=mmaction/datasets/pipelines/loading.py

[OpenMMLab-Assistant003]

Hi @congee524！First of all, we want to express our gratitude for your significant PR in the MMAction2 project. Your contribution is highly appreciated, and we are grateful for your efforts in helping improve this open-source project during your personal time. We believe that many developers will benefit from your PR.

We would also like to invite you to join our Special Interest Group (SIG) private channel on Discord, where you can share your experiences, ideas, and build connections with like-minded peers. To join the SIG channel, simply message moderator— OpenMMLab on Discord or briefly share your open-source contributions in the #introductions channel and we will assist you. Look forward to seeing you there! Join us ：https://discord.gg/UjgXkPWNqA

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Thank you again for your contribution❤ @congee524