🤖 Fix: Checkout inventory validation and add tests

[sentry-autofix]

👋 Hi there! This PR was automatically generated by Autofix 🤖

This fix was triggered by Gideon Lapshun

Fixes FLASK-1GX

• Fixes a bug where inventory count was not being properly accessed during checkout.
• Adds comprehensive unit tests for the checkout process, including scenarios for sufficient inventory, insufficient inventory, missing inventory records, and type conversion of inventory quantities.
• Modifies the checkout function to correctly validate inventory levels and handle cases where inventory records are missing.
• Adds a test fixture for setting up a test database with inventory data.

If you have any questions or feedback for the Sentry team about this fix, please email [email protected] with the Run ID: 6946.

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1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
empower	⬜️ Ignored (Inspect)	Visit Preview		Feb 27, 2025 9:42am

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: flask/src/db.py

Function	Unhandled Issue
get_inventory	DatabaseConnectionError: get_inventory checkout Event Count: 8

📄 File: flask/src/main.py (Click to Expand)

Function	Unhandled Issue
checkout	Exception: Not enough inventory for product checkout Event Count: 3.1k
checkout	DatabaseConnectionError: get_inventory checkout Event Count: 8

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 30.56%. Comparing base (63e4f96) to head (21eab51).

✅ All tests successful. No failed tests found.

❌ Your project check has failed because the head coverage (30.56%) is below the target coverage (35.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #700      +/-   ##
==========================================
+ Coverage   30.10%   30.56%   +0.45%     
==========================================
  Files          38       38              
  Lines         940      926      -14     
  Branches      113      113              
==========================================
  Hits          283      283              
+ Misses        640      626      -14     
  Partials       17       17              

Flag	Coverage Δ		*Carryforward flag
api	6.84% <ø> (+0.24%)	⬆️	Carriedforward from 63e4f96
frontend	47.06% <ø> (ø)		Carriedforward from 63e4f96

*This pull request uses carry forward flags. Click here to find out more.

Components	Coverage Δ
checkout_module	6.84% <ø> (+0.24%)	⬆️
product_component	43.30% <ø> (ø)

Files with missing lines	Coverage Δ
flask/src/db.py	0.00% <ø> (ø)
flask/src/main.py	0.00% <ø> (ø)