Added more proxy tests

[jmartin82]

No description provided.

[jmartin82]

@estermaja-teamcmp I've just added some more tests I hope I didn't break your implementation.

[codecov]

Codecov Report

Merging #56 into master will increase coverage by 0.29%.
The diff coverage is 30%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
+ Coverage   66.66%   66.96%   +0.29%     
==========================================
  Files          18       19       +1     
  Lines         858      890      +32     
==========================================
+ Hits          572      596      +24     
- Misses        254      260       +6     
- Partials       32       34       +2

Impacted Files	Coverage Δ
server/dispatcher.go	0% <0%> (ø)	⬆️
proxy/proxy.go	80% <100%> (ø)

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