Add test coverage for docker compose platform type

[timcallaghan]

Adding missing test coverage for previous PR - #217

[timcallaghan]

Hi @artursouza - here's a PR adding some test coverage for my previous PR

[codecov]

Codecov Report

Merging #252 (a5d05d9) into master (4c87fc7) will increase coverage by 18.88%.
The diff coverage is 80.00%.

@@             Coverage Diff             @@
##           master     #252       +/-   ##
===========================================
+ Coverage    8.67%   27.56%   +18.88%     
===========================================
  Files           7        7               
  Lines         795      798        +3     
===========================================
+ Hits           69      220      +151     
+ Misses        720      554      -166     
- Partials        6       24       +18     

Impacted Files	Coverage Δ
pkg/components/components.go	35.00% <0.00%> (+35.00%)	⬆️
pkg/instances/instances.go	22.39% <100.00%> (+14.83%)	⬆️

... and 1 file with indirect coverage changes

[Mamotchenko]

Any news?

[oridotaoyebode]

• 1 waiting patiently for this to be approved.