jest

Jest async test timeout

Exceeded timeout.*Async callback|exceeded.*5000.*ms|jest.*timeout

Fixes

1.Ensure async functions resolve: await the promise or call done()
2.Increase timeout: jest.setTimeout(10000) or third arg to it()
3.Check for unresolved promises — missing API mock or dangling await

jestasynctimeout

Related Errors

Jest assertion value mismatch

expect\(received\)\.toBe\(expected\)|Expected.*Received

•Check expected vs actual values — use .toEqual() for objects instead of .toBe()
•For floating point, use .toBeCloseTo() instead of exact equality

Jest mock function not called as expected

Expected.*mock.*to have been called|not been called|toHaveBeenCalled

•Verify the mock is injected correctly — check the module path in jest.mock()
•Ensure the code path that calls the function is actually reached

Jest snapshot mismatch

Snapshot.*does not match|toMatchSnapshot.*failed|1 snapshot.*failed

•Review the diff — if change is intentional, update with: jest --updateSnapshot
•Avoid snapshots of timestamps, random IDs, or unstable output