it-incubator-todolist-ts-17-live-2024-08-17/src/app/app-reducer.test.ts

import { appReducer, InitialStateType, setAppErrorAC, setAppStatusAC } from './app-reducer'

let startState: InitialStateType;

beforeEach(() => {
	startState = {
		error: null,
		status: 'idle',
		isInitialized: false
	}
})

test('correct error message should be set', () => {
	const endState = appReducer(startState, setAppErrorAC('some error'))
	expect(endState.error).toBe('some error');
})

test('correct status should be set', () => {
	const endState = appReducer(startState, setAppStatusAC('loading'))
	expect(endState.status).toBe('loading');
})