test: add test cases about parse object

[starnop]

Signed-off-by: Starnop starnop@163.com

Ⅰ. Describe what this PR did

fixes part of #1756

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how you did it

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #1895 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1895      +/-   ##
==========================================
- Coverage   58.68%   58.63%   -0.06%     
==========================================
  Files         200      200              
  Lines       15565    15565              
==========================================
- Hits         9135     9126       -9     
- Misses       5143     5149       +6     
- Partials     1287     1290       +3

Flag	Coverage Δ
#criv1alpha1test	33.25% <ø> (+0.04%)	⬆️
#criv1alpha2test	33.76% <ø> (-0.04%)	⬇️
#integrationtest	37.89% <ø> (-0.02%)	⬇️
#unittest	13.43% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
cri/stream/httpstream/spdy/upgrade.go	54.28% <0%> (-5.72%)	⬇️
ctrd/image.go	78.71% <0%> (-2.48%)	⬇️
ctrd/container.go	49.48% <0%> (-0.69%)	⬇️
cri/v1alpha1/cri.go	65.04% <0%> (-0.19%)	⬇️
cri/v1alpha2/cri.go	65.96% <0%> (-0.18%)	⬇️
daemon/mgr/container.go	53.3% <0%> (ø)	⬆️
ctrd/watch.go	78.12% <0%> (+3.12%)	⬆️