They will keep running as you are working,Īnd they will constantly check your code against test cases in case anything breaks. Now if you are done all you have to do yarn test.
Then we can values of fields and trigger submit button click like we do earlier, and finally checking the id=1 is really has title of Test Title and author of Test Author. And we know if we are updating, title should be Update Book we also check
Prepopulated input fields with associated id information in our case it's 1984 and George Orwell. It wraps the string primitive data type with a number of helper methods. In test UpdateBook page, this one is pretty similar to AddBook page, but we first fetch book id that comes from useParams if it's really there, we know we would have TypeScript - Strings Previous Page Next Page The String object lets you work with a series of characters. Then we fireEvent to fill them up, then as if it's real user, we press submit button, and finally like we've previously done in slice we check bookList's length to see if it incremented. createSlice A function that accepts an initial state, an object of reducer functions, and a 'slice name', and automatically generates action creators and action types that correspond to the reducers and state. In test AddBook page, we first fetch our input fields by placeholders since they are already defined we can easily access it. Our first test Renders BookInfo, renders a book with the id of 1, which is 1984 all we have to do check whether there is an element associated with 1984 or not. We've used Memory Router to test our React Router as well. BookSlice.ts # import ) īefore we begin tests, we need to make our utility functions renderAddBook, renderUpdateBook, renderBook and getABook. so we explicitly declare the shape of the returned normalized data as a generic arg.Ĭonst normalized = normalize ( data, articleEntity ) Note: at the time of writing, normalizr does not automatically infer the result, Normalize the data so reducers can responded to a predictable payload. Success ( state : GenericState, action : PayloadAction ) Įxport const fetchArticle = createAsyncThunk (Ĭonst data = await fakeAPI. * This is a general problem when working with immer's Draft type and generics. * which can sometimes be problematic with yet-unresolved generics. * State type manually here, as it defaults to `Draft>`, * (in this case: `state.data`, which is T), you might need to specify the * If you want to write to values of the state that depend on the generic Reducers : ValidateSliceCaseReducers, Reducers > Status : 'loading' | 'finished' | 'error'
0 kommentar(er)
