test: Specify which collection to update in test framework

[AndrewSisley]

Relevant issue(s)

Resolves #572

Description

Specify which collection to update in test framework, and only update items from that collection.

Tasks

• I made sure the code is well commented, particularly hard-to-understand areas.
• I made sure the repository-held documentation is changed accordingly.
• I made sure the pull request title adheres to the conventional commit style (the subset used in the project can be found in tools/configs/chglog/config.yml).
• I made sure to discuss its limitations such as threats to validity, vulnerability to mistake and misuse, robustness to invalidation of assumptions, resource requirements, ...

[codecov]

Codecov Report

Merging #601 (c24bb22) into develop (7e90fbb) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #601      +/-   ##
===========================================
- Coverage    56.37%   56.36%   -0.01%     
===========================================
  Files          121      121              
  Lines        14303    14303              
===========================================
- Hits          8063     8062       -1     
- Misses        5542     5543       +1     
  Partials       698      698              

Impacted Files	Coverage Δ
db/collection.go	58.16% <0.00%> (-0.18%)	⬇️

[shahzadlone]

Cheers for sorting this out! LGTM!

Not sure if this is a false alarm or it even matters but just bringing up because I saw this on codecov for db/collection.go:

[AndrewSisley]

...codecov for db/collection.go:

It should only hit that line if searching for a field that don't exist, if the code cov changed there it will have been hit by a bad update.

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh I get it now lol, this is why I saw the docKey (field index=0) had been replaced by the bad update's field value 😆 Nice spot Shahzad, I'll change that func in a new PR as that is not wonderful (should be a try-get at a glance, or at least a panic/error...).