Add tests and raise coverage#190

Merged

phated merged 4 commits intogulpjs:masterfrom

Apr 20, 2019

Commits on Apr 9, 2019

Update: Change tests of log-level by config flags to no remote access
sttk
committed

Commits on Apr 13, 2019

Update: Add more tests and raise the coverage
sttk
committed

Commits on Apr 20, 2019