Add documentation for testing implementations about next-themes HOT 1 CLOSED

let localStorageMock: { [key: string]: string } = {}

beforeAll(() => {
  // Create a mock of the window.matchMedia function
  global.matchMedia = jest.fn(query => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: jest.fn(),
    removeListener: jest.fn(),
    addEventListener: jest.fn(),
    removeEventListener: jest.fn(),
    dispatchEvent: jest.fn()
  }))

  // Create mocks of localStorage getItem and setItem functions
  global.Storage.prototype.getItem = jest.fn(
    (key: string) => localStorageMock[key]
  )
  global.Storage.prototype.setItem = jest.fn((key: string, value: string) => {
    localStorageMock[key] = value
  })
})

beforeEach(() => {
  // Clear the localStorage-mock
  localStorageMock = {}
})