Following what I did last week, I spent this week learning how to debug the code, using breakpoints more in the debugging. I tried to solve the fake-timers issue I had last week, by reading the react native docs. I dived more into testing asynchronous code, and learnt several ways to make the test effective. So I used async/await correctly to pass that.
The flatList component of react native was a major time-consuming task that I needed to test. Unfortunately, I spent a lot of time trying to solve the problem and I failed to resolve it. The error message given was always related to the testing configuration, which already set up and working successfully last week. Therefore, I considered changing the code and replacing the FlatList components with SectionList to avoid all of this, but it was not the perfect option.
Finally, in order to solve the aforementioned problem, I had to mock the FlatList at the end. it seemed quite impossible to test or to get an element form a FlatList unless it is mocked.