sqlite3-jest-memory-leak
An illustration of a memory leak when using sqlite3 with jest
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This illustrates a memory leak that occurs when using jest with sqlite3. After cloning, run npm install && npm test to see the error:
FAIL ./leak.test.js
● Test suite failed to run
EXPERIMENTAL FEATURE!
Your test suite is leaking memory. Please ensure all references are cleaned.
There is a number of things that can leak memory:
- Async operations that have not finished (e.g. fs.readFile).
- Timers not properly mocked (e.g. setInterval, setTimeout).
- Keeping references to the global scope.
at onResult (node_modules/@jest/core/build/TestScheduler.js:188:18)
Commenting out the require('sqlite3'); line from leak.test.js causes the test to pass.