import MyStore from '../src/renderer/store/MyStore'

/* The state methods within this get overridden by jest.spyOn(), as below. */
jest.mock('../src/renderer/store/MyStore', () => jest.fn())

export class MyStoreMock {
	/**
	 * Overrides specific items in the MyStore. This gets called by each test
	 * to ensure they are each using different spies & values.
	 *
	 * @static
	 * @param {Map} mockStoreItems
	 * @param {*} uniqueID
	 * @memberof MyStoreMock
	 */
	public static init(mockStoreItems: Map, uniqueID: any) {
		/* Useful for initialising the store's items with unique values. */
		if (uniqueID) {
			for (const key of mockStoreItems) {
				mockStoreItems.set(key[0], uniqueID + key[0])
			}
		}

		jest.spyOn(MyStore, 'commit').mockImplementation((commitItem: any, 
			newValue: any) => {
				mockStoreItems.set(commitItem, newValue)
		})

		jest.spyOn(MyStore, 'getters', 'get').mockImplementation(() => {
			/* We must generate this now to include 'commit' changes etc. */
			let getters = {}

			for (const key of mockStoreItems) {
				getters[key[0]] = key[1]
			}

			return getters
		})
	}
}

import { PinkFloyd } from '../../src/renderer/model/PinkFloyd'
import { MyStoreMock } from '../../MyStoreMock'

describe('Mock Example', () => {
	test('MyStoreMock', () => {
		let mockStoreItems = new Map()
		/* This value will get set using the global unique ID on the next line.
		 * The production store has a value of 'The Endless River' */
		mockStoreItems.set('worstAlbum', '')

		MyStoreMock.init(mockStoreItems, "There isn't one")

		/* The production store has a value of 'Wish You Were Here' */
		mockStoreItems.set('bestAlbum', 'Dark Side of the Moon')

		/* Modules can be mocked as well.
		 * The production store has a value of 'David, Rick, Roger, Nick' */
		mockStoreItems.set('Members/names', ['John', 'Paul', 'Whoops'])

		const pinkFloyd = new PinkFloyd()

		/* This sets all the data that we're testing below */
		pinkFloyd.getData()

		expect(pinkFloyd.worstAlbum).toBe('There isn't one')
		expect(pinkFloyd.bestAlbum).toBe('Dark Side of the Moon')
		expect(pinkFloyd.members).toContain('Whoops')
	})
})