javascript

Vitest mock never called assertion

vitest.*expect.*toHaveBeenCalled.*never called

Fixes

1.Verify function is actually invoked in code
2.Check mock is set up before action
3.Use await on async operations before assert

vitestmockassertion

Related Errors

javascript3 fixes

Cannot read property of undefined

Cannot read propert(y|ies) of undefined

•Add optional chaining (?.)
•Check if object exists before accessing

javascript3 fixes

Cannot read property of null

Cannot read propert(y|ies) of null

•Add null check before access
•Use optional chaining (?.)

javascript3 fixes

TypeError: X is not a function

is not a function

•Check spelling of method name
•Verify import is correct