修复mockUser重复调用时由于createContext已经被修改导致第二次调用不生效

[weijiafu14]

Checklist

• npm test passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

Description of change

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 18.47%. Comparing base (9b93fa3) to head (8083686).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
app/extend/application.unittest.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #17       +/-   ##
===========================================
- Coverage   91.92%   18.47%   -73.46%     
===========================================
  Files           8        6        -2     
  Lines         161      157        -4     
===========================================
- Hits          148       29      -119     
- Misses         13      128      +115     

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