test(mongodb): verify User schema behaviors under connection state 0 (disconnected) (Variation 5)

[souravjhahind]

🧩 Background

When the database connection is interrupted or in a non-active state, model operations must behave cleanly.

🎯 Objective

Verify user model and schema behavior under database connection state 0 (disconnected).

📁 Files to touch

• lib/mongodb.test.ts
• models/User.test.ts

🛠️ Implementation steps

• Mock mongoose connection states using database stubs.
• Verify that database operations queries fail gracefully with a descriptive ConnectionError.

✅ Definition of done

• 1 new test case simulating connection state change.
• All database tests pass.

[ThePriyanuj]

/claim

Hi @JhaSourav07,

I would like to lock down this MongoDB connection state testing variation under GSSoC '26! Since my environment is already configured locally from my previous successful merge here, I can execute this immediately.

🔬 My Planned Testing Implementation Strategy:

1. State Mocking: I will target lib/mongodb.test.ts and models/User.test.ts and mock the Mongoose connection lifecycle, hard-setting mongoose.connection.readyState to 0 (Disconnected) using localized test spies/stubs.
2. Graceful Error Assertions: I will wrap the User schema query operations (e.g., User.findOne()) inside failing block assertions, validating that the execution layer accurately catches the break and throws a descriptive ConnectionError.
3. Sandbox Isolation Lifecycle: I will implement strict cleanup handling inside the afterEach hooks to completely clear the database stubs, ensuring that forcing state 0 inside this variation does not leak into or break subsequent backend test vectors.

I can spin up this test case and submit a clean, green PR right away. Thank you!

[github-actions]

🎉 Assigned! Welcome to the project, @ThePriyanuj.

⏳ Reminder: You have 2 days to submit a Pull Request. After 2 days of inactivity, you will be automatically unassigned to give others a chance (as per our GSSoC anti-hoarding policy).

💡 Please read CONTRIBUTING.md if you haven't already.

Happy coding! 🚀