@johngw/stream/test/storages/MemoryStorage.test.ts

Reactive programming tools using the WHATWG Streams API.

import { MemoryStorage } from '@johngw/stream/storages/MemoryStorage'

let storage: MemoryStorage

beforeEach(() => {
  storage = new MemoryStorage()
})

test('getting unset values', () => {
  expect(storage.getItem('foo')).toBeNull()
})

test('set values', () => {
  storage.setItem('foo', 'bar')
  expect(storage.getItem('foo')).toBe('bar')
})

test('removing values', () => {
  storage.setItem('foo', 'bar')
  storage.removeItem('foo')
  expect(storage.getItem('foo')).toBeNull()
})

test('clearing', () => {
  storage.setItem('foo', 'bar')
  storage.setItem('bar', 'foo')
  storage.clear()
  expect(storage.getItem('foo')).toBeNull()
  expect(storage.getItem('bar')).toBeNull()
})

test('length', () => {
  storage.setItem('foo', 'bar')
  expect(storage.length).toBe(1)
  storage.setItem('bar', 'foo')
  expect(storage.length).toBe(2)
})

test('key', () => {
  storage.setItem('bar', 'foo')
  storage.setItem('foo', 'bar')
  expect(storage.key(0)).toBe('bar')
  expect(storage.key(1)).toBe('foo')
})