81 lines
2.2 KiB
TypeScript
81 lines
2.2 KiB
TypeScript
import {getHistory, removeListFromHistory, saveListToHistory} from './listHistory'
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test('return an empty history when none was saved', () => {
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Storage.prototype.getItem = jest.fn(() => null)
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const h = getHistory()
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expect(h).toStrictEqual([])
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})
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test('return a saved history', () => {
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const saved = [{id: 1}, {id: 2}]
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Storage.prototype.getItem = jest.fn(() => JSON.stringify(saved))
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const h = getHistory()
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expect(h).toStrictEqual(saved)
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})
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test('store list in history', () => {
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let saved = {}
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Storage.prototype.getItem = jest.fn(() => null)
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Storage.prototype.setItem = jest.fn((key, lists) => {
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saved = lists
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})
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saveListToHistory({id: 1})
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expect(saved).toBe('[{"id":1}]')
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})
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test('store only the last 5 lists in history', () => {
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let saved: string | null = null
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Storage.prototype.getItem = jest.fn(() => saved)
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Storage.prototype.setItem = jest.fn((key: string, lists: string) => {
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saved = lists
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})
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saveListToHistory({id: 1})
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saveListToHistory({id: 2})
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saveListToHistory({id: 3})
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saveListToHistory({id: 4})
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saveListToHistory({id: 5})
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saveListToHistory({id: 6})
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expect(saved).toBe('[{"id":6},{"id":5},{"id":4},{"id":3},{"id":2}]')
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})
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test('don\'t store the same list twice', () => {
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let saved: string | null = null
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Storage.prototype.getItem = jest.fn(() => saved)
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Storage.prototype.setItem = jest.fn((key: string, lists: string) => {
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saved = lists
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})
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saveListToHistory({id: 1})
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saveListToHistory({id: 1})
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expect(saved).toBe('[{"id":1}]')
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})
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test('move a list to the beginning when storing it multiple times', () => {
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let saved: string | null = null
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Storage.prototype.getItem = jest.fn(() => saved)
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Storage.prototype.setItem = jest.fn((key: string, lists: string) => {
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saved = lists
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})
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saveListToHistory({id: 1})
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saveListToHistory({id: 2})
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saveListToHistory({id: 1})
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expect(saved).toBe('[{"id":1},{"id":2}]')
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})
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test('remove list from history', () => {
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let saved: string | null = '[{"id": 1}]'
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Storage.prototype.getItem = jest.fn(() => null)
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Storage.prototype.setItem = jest.fn((key: string, lists: string) => {
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saved = lists
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})
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Storage.prototype.removeItem = jest.fn((key: string) => {
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saved = null
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})
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removeListFromHistory({id: 1})
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expect(saved).toBeNull()
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})
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