WIP: appveyor: enable integration test

[iblislin]

No description provided.

[codecov-io]

Codecov Report

Merging #336 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #336   +/-   ##
=======================================
  Coverage   70.22%   70.22%           
=======================================
  Files          24       24           
  Lines        1928     1928           
=======================================
  Hits         1354     1354           
  Misses        574      574

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[iblislin]

omg, it failed.

[pluskid]

hmm, it seems it is not reaching the expected performance under windows? First thing might be do some regression test on some older version. Maybe easier if we have local windows machines, but I don't think any one of us actually have.