JSON.stringify / parse tests for state

stringify-parse-test.js

let store = {}

/** @private */
function put (key, value) {
  store[key] = JSON.stringify(value)
}

/** @private */
function get (key) {
  const value = store[key]
  try {
    return JSON.parse(value)
  } catch (e) {
    return value
  }
}

beforeEach(() => {
  store = {}
})

test('object', () => {
  const key = 'my-key'
  const value = { my: 12, value: true }

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('array', () => {
  const key = 'my-key'
  const value = ['foo', 'bar']

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('boolean', () => {
  const key = 'my-key'

  put(key, true)
  expect(get(key)).toStrictEqual(true)

  put(key, false)
  expect(get(key)).toStrictEqual(false)
})

test('number', () => {
  const key = 'my-key'
  const value = 12

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('string', () => {
  const key = 'my-key'
  const value = 'some string'

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('object as string (use JSON.stringify)', () => {
  const key = 'my-key'
  const value = JSON.stringify({ my: 12, value: true })

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('invalid object as string 1 (manual)', () => {
  const key = 'my-key'
  const value = '{ my: 12, value: true }'

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('invalid object as string 2 (manual)', () => {
  const key = 'my-key'
  const value = '{ "my": 12, "value": true'

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

test('undefined', () => {
  const key = 'my-key'
  const value = undefined

  put(key, value)
  expect(get(key)).toStrictEqual(value)
})

// anything passed to JSON.stringify (in the case of put above)
// it will use the .toJSON to serialize, so `get` will be that transformed value
test('date', () => {
  const key = 'my-key'
  const value = new Date()

  put(key, value)
  expect(get(key)).toStrictEqual(value.toJSON()) // have to do .toJSON()
})