Please help. I cannot run test because in my util langProvider is package that drops tests. I have to mock langProvider function or strings variable. How I can do that? My test file Answer not sure, but you can try to insert in your test file before describe function, something like that:
Tag: unit-testing
Jest Unit Testing function that calls a second one that returns a promise
Edited Question with vazsonyidl suggestions applied I have to write unit tests for a function similar to this one: As functionC belongs to another module, I placed a mock of it in the _mocks_folder: I have mocked functionB in two diferent ways for testing the then and the catch : What I am trying to do is exp…
mock post method npm request module with jest
I know that npm request module is now deprecated, but i want to mock a post http call with jest. Here is my function And in try this in my test : But it returns TypeError: Cannot set property ‘post’ of undefined I want to mock that method to handle error and response to test methods inside them An…
TypeError: jwt(…).unless is not a function when mocking with Jest
I am trying to mock the .unless function of express-jwt and currently have this mock setup to compare a JWT with an admin and non admin. This worked perfect until we added .unless and I am not sure the best way to approach the issue. That is the mock. I have tried moving that into a const and adding: mockFun.…
TypeError: nock(…).persist(…).log is not a function
I am trying to get more info on why my nock mock is not right, but I can’t make the persist().log() work. Here is the test : Stackoverflow wants me to add some more details to be able to post this question, but I don’t know what to tell you more than that. Answer .log was removed in Nock v13
jest ReferenceError: Cannot access ” before initialization
I’m getting the error: ReferenceError: Cannot access ‘myMock’ before initialization Even though i respected jest documentation about the hoisting: A limitation with the factory parameter is that, since calls to jest.mock() are hoisted to the top of the file, it’s not possible to first …
Testing Cross Browser Extension With Jest, How To Mock Chrome Storage API?
After putting off testing for a while now due to Cypress not allowing visiting chrome:// urls, I decided to finally understand how to unit/integration test my extension – TabMerger. This comes after the many times that I had to manually test the ever growing functionality and in some cases forgot to che…
JEST | Assert a function was called inside addEventListener callback
I have the following function: Code to test The question is: How can I assert using Jest that createAndAppendPTag was called upon a document click event ? Jest This is what I tried, but can’t seem to make the test pass: Terminal This results in the following: Thanks in advance. Answer I ran this simplif…
Unit test with react hook fails
I don’t understand the result I get on this unit test. I expect the second check for textField.valid to be true and instead it returns false. Below is part of the component I’m testing against: … Below is the test I’m running: The output of console.log(wrapper.debug()) is the following…
Test clearing of search input field on submit (after fetching)
I want to test that a search box does calls a handler (passed as prop) with the fetched results and resets the input field afterwards. This is the error: Answer waitFor returns a Promise so you need to use await: