jest-battery-mock

BatteryManager API mock for Jest

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Installation

pnpm add -D jest-battery-mock

Example

import { enableMock, disableMock, dispatch } from 'jest-battery-mock'

beforeEach(() => enableMock())
afterEach(() => disableMock())

test('example', async () => {
  const batteryManager = await navigator.getBattery()
  const callback = jest.fn()
  
  batteryManager.addEventListener('chargingchange', callback)
  dispatch({ charging: false })
  expect(callback).toBeCalledTimes(1)
})

API

enableMock

Enable mock for navigator.getBattery

type enableMock = (preset?: BatteryInfo) => void

You can set BatteryManager initial state with preset, By default use PRESET_COMMON

disableMock

Disable mock for navigator.getBattery

type disableMock = () => void

dispatch

Change BatteryManager state and trigger event, trigger the corresponding event only when the state changes

type dispatch = (state?: Partial<BatteryInfo>) => boolean

You can also use preset here

Preset

We have some presets for you, you can use it when call enableMock and dispatch:

	PRESET_COMMON	PRESET_USE_BATTERY	PRESET_LOW_POWER
charging	true	false	false
chargingTime	0	Infinity	Infinity
dischargingTime	Infinity	Infinity	0
level	1	0.8	0.1

Reference & Thanks

• jest-fetch-mock