improve tests for scandir.go

[nbari]

improve tests for scandir.go and watchdir.go mainly the onew using kqueue (freebsd netbsd openbsd dragonfly darwin)

func (s *ScanDir) Start(ctl Control) {}

and

func (s *ScanDir) Scandir(ctl Control) error {}

[yogesh-desai]

Hi @nbari
Could you please explain more about it? Specifically, what you mean by,

mainly the onew using kqueue (freebsd netbsd openbsd dragonfly darwin)

[nbari]

It probably helps to mention that kqueue is not available in Linux therefore for BSD systems the tests need to be improved.

For example if you are in mac, after cloning the repo type make cover (you may need make get before). That will open a browser and show the overall coverage in where you will notice that scandir.go and watchdir.go need some improvements/refactoring in order to improve the tests/coverage.