/**
 * Copyright (c) Nicolas Gallagher.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

import Dimensions from '..'

describe('apis/Dimensions/index.js', () => {
  test('get', () => {
    expect(Dimensions.get('screen')).toMatchInlineSnapshot(`
      {
        "fontScale": 1,
        "height": 0,
        "scale": 1,
        "width": 0,
      }
    `)
    expect(Dimensions.get('window')).toMatchInlineSnapshot(`
      {
        "fontScale": 1,
        "height": 768,
        "scale": 1,
        "width": 1024,
      }
    `)
  })

  test('set', () => {
    expect(() => Dimensions.set({})).toThrow()
  })

  test('addEventListener', () => {
    const handler = jest.fn()
    const subscription = Dimensions.addEventListener('change', handler)
    Dimensions._update()
    expect(handler).toHaveBeenCalledTimes(1)
    expect(handler).toHaveBeenLastCalledWith({
      window: Dimensions.get('window'),
      screen: Dimensions.get('screen'),
    })
    subscription.remove()
    Dimensions._update()
    expect(handler).toHaveBeenCalledTimes(1)
  })

  test('removeEventListener', () => {
    const handler = jest.fn()
    Dimensions.removeEventListener('change', handler)
    Dimensions._update()
    expect(handler).toHaveBeenCalledTimes(0)
  })
})