add more unit test for location and std

[zhangzifa]

No description provided.

[codecov-io]

Codecov Report

Merging #15 into master will increase coverage by 8.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #15      +/-   ##
==========================================
+ Coverage   74.55%   82.74%   +8.18%     
==========================================
  Files          65       65              
  Lines        1588     1588              
==========================================
+ Hits         1184     1314     +130     
+ Misses        404      274     -130

Impacted Files	Coverage Δ
...ore/src/location/model/DescribeEndpointsRequest.cc	100% <0%> (+30%)	⬆️
...ude/alibabacloud/core/sts/model/AssumeRoleResult.h	66.66% <0%> (+66.66%)	⬆️
core/src/location/model/DescribeEndpointsResult.cc	100% <0%> (+86.84%)	⬆️
core/src/sts/model/AssumeRoleResult.cc	100% <0%> (+100%)	⬆️
core/src/sts/StsRequest.cc	100% <0%> (+100%)	⬆️
core/src/sts/model/GetCallerIdentityRequest.cc	100% <0%> (+100%)	⬆️
core/src/sts/model/AssumeRoleRequest.cc	100% <0%> (+100%)	⬆️
core/src/sts/model/GetCallerIdentityResult.cc	100% <0%> (+100%)	⬆️

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