I have the following function that is used within cypress tests for which I want to do unit testing (filterTests.js): A test double for Cypress.env needs to be created. I’m not sure if this would technically be considered a stub, mock, fake, dummy, etc…, but the philosophical discussion isn’…
Tag: testing
how to fix an error “is not a function” in unit testing angular 11
I saw this error lot of times but any solution for my problem, my component : My test : I don’t understand why I got this error : ” TypeError: this.dialogService.refs.push is not a function” I try to replace useClass instead of useValue but I had unreachable knowing is angular 11. I did lot …
Karma-jasmine How i test a close function in a modal
I need to test this, but I’m new testing and I do not have idea, I’m working with angular, I just want to test the close function and maybe if it renders. This is the html. And this is the modal.component.ts Answer In order to test if EventEmitter emits an event when clicking on background div, yo…
How to set Node Environment as Env Variable in the middle of the app?
I know that I can do process.env.NODE_ENV = TEST but it is not working for me. Relevant code below: test.js src/index.js user.js So the issue here is that when I run test.js, I am importing, and therefore running user.js before I set my NODE_ENV. Since imports are hoisted I can’t bring the env setting e…
Can I rethrow a rejected await function, and catch it immediately
I’d like to catch all my exceptions in one place, but I can’t do that currently: There is an important thing to note if you like more try/catch. The following code won’t catch the error: […] Remember: a rejected Promise will propagate up in the stack unless you catch it. To catch the e…
Jest coverage tools fail
During in my react-native project, during test execution, Jest shows coverage and creates coverage reports. Jest config: During testing I get errors: in files which are generated during creation of coverage folder: So, in jest documentation we see that we can specify jsdom environment in file which produces e…
Looping through an array and run a Jest test for each element does not work
I have a very large array of JSON objects. I need to run Jest tests on each individual element. I tried iterating through the array first and then write the tests in the loop as such: However with this code Jest complains that ” Your test suite must contain at least one test.” Do I have to loop ov…
React Testing Library does not find elements using getAllByTestId after initial render
I have a very simple component where I am trying to simulate an API call to get some movies with a slight delay. I want to write a test which tests that the movies are gathered and then rendered to screen. I am trying to use screen.getAllByTestId to do this, however it always fails. It is as if it doesn’…
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…
Cypress: Using cy.intercept() to check if a call hasnt been made yet?
Using cy.intercept() to intercept (and stub) a couple of network requests (to google tag manager), but would like to test at an early point in my test before I expect them to be called. How would I test that the 2 routes I’m intercepting haven’t been called yet? Thanks! Answer Intercept has a rout…