Consider this set of code snippets where I want to write unit tests for function A, which internally calls function B during execution. Assume B is a set of API calls for validation that I want to mock return value to true.
But this spyOn method approach does not work, and the API calls in B still get executed. I've seen approaches with mocking the complete module with jest.requireActual(), but they do not seem to work too.
What could be a better way to test such functions without changing a lot in the codebase index.ts?
//index.ts
async function A() {
// code
await B();
// code
}
async function B() {
//code
//code
}
export default {
A,
B }
//index.test.ts
import index from '../index.ts';
describe('Test suit', ()=>{
it('should be a test for function A', async ()=> {
jest.spyOn(index, 'B').mockReturnValue(true);
// code
const result = await index.A();
// code
})
})
