Add common testing function of MM repos

[congee524]

Add common testing function of MM repos

[codecov]

Codecov Report

Merging #743 (7e058f2) into master (4f0f1f9) will decrease coverage by 1.45%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #743      +/-   ##
==========================================
- Coverage   64.85%   63.40%   -1.46%     
==========================================
  Files         136      144       +8     
  Lines        7989     8440     +451     
  Branches     1411     1511     +100     
==========================================
+ Hits         5181     5351     +170     
- Misses       2539     2820     +281     
  Partials      269      269              

Flag	Coverage Δ
unittests	63.40% <100.00%> (-1.46%)	⬇️

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

Impacted Files	Coverage Δ
mmcv/utils/__init__.py	88.23% <100.00%> (+0.73%)	⬆️
mmcv/utils/testing.py	100.00% <100.00%> (ø)
mmcv/ops/roi_align.py	60.00% <0.00%> (-1.85%)	⬇️
mmcv/tensorrt/tensorrt_utils.py	0.00% <0.00%> (ø)
mmcv/onnx/info.py	12.50% <0.00%> (ø)
mmcv/tensorrt/init_plugins.py	0.00% <0.00%> (ø)
mmcv/onnx/simplify/core.py	14.04% <0.00%> (ø)
mmcv/onnx/simplify/__init__.py	100.00% <0.00%> (ø)
mmcv/onnx/simplify/common.py	13.79% <0.00%> (ø)
... and 5 more

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[hellock]

Use unified naming conventions for methods with similar functionalities.

[congee524]

kindly ping :p