Test coverage

[Razzwan]

Is your feature request related to a problem? Please describe.
Add test coverage. Try to combine test coverage from unit and integrational tests

Describe the solution you'd like
We can try to use native coverage from mocha + chai libraries. If not, we can specify all our routes and branches manually and calculate it

Describe alternatives you've considered
Perhapse some 3d part libraries can halp for that

Additional context
Priority is low