266-1:add testing cri_utils_test.go

[mangodai]

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

fixes #1912

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[pouchrobot]

We found this is your first time to contribute to Pouch, @mangodai
👏 We really appreciate it.
Just remind that you have read the contribution guide: https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md
If you didn't, you should do that first. If done, welcome again and please enjoy hacking! 🍻

[codecov-io]

Codecov Report

Merging #1956 into master will decrease coverage by 7.47%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1956      +/-   ##
==========================================
- Coverage   63.31%   55.84%   -7.48%     
==========================================
  Files         200      200              
  Lines       15522    15522              
==========================================
- Hits         9828     8668    -1160     
- Misses       4455     5617    +1162     
+ Partials     1239     1237       -2

Flag	Coverage Δ
#criv1alpha1test	37.58% <ø> (+3.72%)	⬆️
#criv1alpha2test	34.26% <ø> (-0.02%)	⬇️
#integrationtest	38.42% <ø> (-0.02%)	⬇️
#unittest	18.15% <ø> (-2.71%)	⬇️

Impacted Files	Coverage Δ
pkg/multierror/def.go	15.38% <0%> (-84.62%)	⬇️
daemon/logger/loggerutils/tag.go	0% <0%> (-81.82%)	⬇️
cri/v1alpha1/cri_stream.go	0% <0%> (-80%)	⬇️
cri/v1alpha1/service/cri.go	0% <0%> (-73.34%)	⬇️
pkg/utils/utils.go	25.64% <0%> (-64.53%)	⬇️
pkg/bytefmt/bytefmt.go	28.81% <0%> (-64.41%)	⬇️
ctrd/image_proxy_util.go	7.81% <0%> (-59.38%)	⬇️
cri/v1alpha1/cri_wrapper.go	0% <0%> (-57.15%)	⬇️
daemon/mgr/container_envs.go	11.76% <0%> (-54.91%)	⬇️
daemon/logger/info.go	0% <0%> (-53.66%)	⬇️
... and 35 more