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| import { reactive, computed } from 'vue' | |
| const registerModules = (modules, state) => { | |
| for (const [name, module] of Object.entries(modules)) { | |
| state[name] = module.state | |
| if (module.modules) { | |
| registerModules(module.modules, module.state) | |
| } | |
| } | |
| return state | |
| } | |
| class Store { | |
| constructor(options) { | |
| let state = options.state | |
| if (options.modules) { | |
| state = registerModules(options.modules, state) | |
| } | |
| if (options.state) { | |
| this.state = reactive(state) | |
| } | |
| if (options.mutations) { | |
| this.mutations = options.mutations | |
| } | |
| if (options.actions) { | |
| this.actions = options.actions | |
| } | |
| if (options.getters) { | |
| this.getters = {} | |
| const { getters } = options | |
| for (const [handle, fn] of Object.entries(getters)) { | |
| Object.defineProperty(this.getters, handle, { | |
| get: () => computed(() => fn(this.state)).value | |
| }) | |
| } | |
| } | |
| } | |
| commit(handle, payload) { | |
| this.mutations[handle](this.state, payload) | |
| } | |
| dispatch(handle, payload) { | |
| const call =this.actions[handle](this, payload) | |
| if (!call || !call.then) { | |
| return Promise.resolve(call) | |
| } | |
| } | |
| } | |
| export const Vuex = { | |
| Store | |
| } | |
| import { Vuex } from './' | |
| const createStore = () => new Vuex.Store({ | |
| state: { | |
| count: 1 | |
| }, | |
| mutations: { | |
| INCREMENT(state, payload) { | |
| state.count += payload | |
| } | |
| }, | |
| actions: { | |
| increment(context, payload) { | |
| context.commit('INCREMENT', payload) | |
| } | |
| }, | |
| getters: { | |
| triple: state => state.count * 3 | |
| } | |
| }) | |
| test('commits a mutation', () => { | |
| const store = createStore() | |
| store.commit('INCREMENT', 5) | |
| expect(store.state.count).toBe(6) | |
| }) | |
| test('dispatches an action', () => { | |
| const store = createStore() | |
| return store.dispatch('increment', 5).then(() => { | |
| expect(store.state.count).toBe(6) | |
| }) | |
| }) | |
| test('getters are computed', () => { | |
| const store = createStore() | |
| expect(store.getters['triple']).toBe(3) | |
| store.state.count += 1 | |
| expect(store.getters['triple']).toBe(6) | |
| }) | |
| test('is has nested state', () => { | |
| const store = new Vuex.Store({ | |
| state: {}, | |
| modules: { | |
| levelOne: { | |
| state: {}, | |
| modules: { | |
| levelTwo: { | |
| state: { name: 'level two' } | |
| } | |
| } | |
| } | |
| } | |
| }) | |
| expect(store.state.levelOne.levelTwo.name).toBe('level two') | |
| }) |
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