test: improve test coverage

[jescalada]

Improves test coverage on route files and MongoDB handlers.

[netlify]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	3e9059c
🔍 Latest deploy log	https://app.netlify.com/projects/endearing-brigadeiros-63f9d0/deploys/696c81ab0cbec100088dae6b

[netlify]

✅ Deploy Preview for endearing-brigadeiros-63f9d0 canceled.

Name	Link
🔨 Latest commit	698e39f
🔍 Latest deploy log	https://app.netlify.com/projects/endearing-brigadeiros-63f9d0/deploys/69a853e34441f800087e00df

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.01%. Comparing base (3c43652) to head (698e39f).
⚠️ Report is 38 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1356      +/-   ##
==========================================
+ Coverage   81.77%   90.01%   +8.24%     
==========================================
  Files          67       67              
  Lines        4769     4769              
  Branches      827      885      +58     
==========================================
+ Hits         3900     4293     +393     
+ Misses        853      458     -395     
- Partials       16       18       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[fabiovincenzi]

Great work! Thanks @jescalada , just a few minor cleanup items.

[andypols]

LGTM - a much needed improvement to the code. Only one suggestion to make a test intent clearer.

[dcoric]

Great coverage improvement overall. Added small comments for double teardown and to reduce flakiness if an assertion fails mid-test.

[jescalada]

@andypols Fixed the coverage dip and failing/misleading tests; should be ready to merge!

[kriswest]

@andypols you'll have to re-review before this can merge (as you have write perms and requested changes)

[andypols]

LGTM - approved for merge