Increase coverage for test_actors

[skoudoro]

This PR just adds some more global tests and fix some pep8.

[codecov]

Codecov Report

Merging #107 into master will increase coverage by 1.7%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #107     +/-   ##
=========================================
+ Coverage   86.15%   87.86%   +1.7%     
=========================================
  Files          14       14             
  Lines        3851     3847      -4     
  Branches      474      471      -3     
=========================================
+ Hits         3318     3380     +62     
+ Misses        397      351     -46     
+ Partials      136      116     -20

Impacted Files	Coverage Δ
fury/actor.py	94.44% <100%> (+7.84%)	⬆️
fury/optpkg.py	80% <100%> (-2.86%)	⬇️
fury/ui.py	85.11% <100%> (ø)	⬆️

[pep8speaks]

Hello @skoudoro! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2019-09-16 19:01:11 UTC

[Garyfallidis]

Good job. Thanks!