storage.spec.js

/*
 * Significant portions copyright 2010 Anthon Pang. Remainder copyright
 * 2012-2016 Snowplow Analytics Ltd. All rights reserved.
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const {
  attemptGetLocalStorage,
  attemptWriteLocalStorage
} = require('../../src/js/lib/helpers')

describe('local storage', () => {

  beforeAll(() => {
    localStorage.clear()
  })

  it('should work for pre existing values with no expiry', () => {
    const value = 'value'
    localStorage.setItem('key', value)
    const retrieved = attemptGetLocalStorage('key')
    expect(retrieved).toBe(value)
  })

  it('should return values', () => {
    const value = 'value'
    const ttl = 1
    attemptWriteLocalStorage('key', value, ttl)
    const retrieved = attemptGetLocalStorage('key')
    expect(retrieved).toBe(value)
  })

  it('should not return expired values', () => {
    const value = 'value'
    const ttl = -1
    attemptWriteLocalStorage('key', value, ttl)
    const retrieved = attemptGetLocalStorage('key')
    expect(retrieved).toBeUndefined()
  })
})