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💻 Software🗄️ DatabasesMongoDB

Stack overflow when testing with jest

Fresh3 days ago
Mar 14, 20260 views
Confidence Score55%
55%

Problem

I created a new project where I install the last version 4.8.1. I got the error about promise and use custom one. [code block] The error don't stop but if I go back to version 4.7.7 all work fine.

Error Output

error about promise and use custom one.

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1 Fix

Canonical Fix
Unverified Fix
New Fix – Awaiting Verification

Resolve Stack Overflow in Jest with MongoDB 4.8.1

Medium Risk

The stack overflow error when testing with Jest in version 4.8.1 is likely due to changes in how promises are handled in the latest version of Mongoose, which may conflict with Jest's promise resolution. This can lead to infinite loops or excessive recursion when Jest tries to resolve asynchronous operations that are not properly managed.

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  1. 1

    Update Jest Configuration

    Modify your Jest configuration to handle promises correctly. Ensure that you are using 'async/await' syntax in your tests to avoid callback hell and stack overflow issues.

    javascript
    module.exports = { testEnvironment: 'node', setupFilesAfterEnv: ['<rootDir>/jest.setup.js'] };
  2. 2

    Implement Async/Await in Tests

    Refactor your test cases to use async/await for handling asynchronous operations. This will help in managing promise resolutions properly and prevent stack overflow.

    javascript
    test('should save user', async () => { const user = new User({ name: 'John' }); await user.save(); const foundUser = await User.findOne({ name: 'John' }); expect(foundUser).toBeDefined(); });
  3. 3

    Check for Circular References

    Inspect your model definitions and ensure there are no circular references that might cause infinite recursion. If found, refactor your models to eliminate these references.

    javascript
    // Example of circular reference
const UserSchema = new mongoose.Schema({ friend: { type: mongoose.Schema.Types.ObjectId, ref: 'User' } });
  4. 4

    Upgrade Mongoose to Latest Patch

    If the issue persists, check for any patch versions of Mongoose that might address this specific issue. Upgrade to the latest version using npm.

    bash
    npm install mongoose@latest
  5. 5

    Run Tests and Monitor

    After making the changes, run your Jest tests again to verify that the stack overflow issue has been resolved. Monitor for any new errors that may arise.

    bash
    npm test

Validation

Confirm the fix worked by running your Jest test suite. If all tests pass without any stack overflow errors, the issue is resolved. Additionally, check the console for any warnings or errors related to promise handling.

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

mongoosemongodbodm