react-native-web/src/apis/AppState/__tests__/index-test.js

/* eslint-env mocha */

import AppState from '..'
import assert from 'assert'

suite('apis/AppState', () => {
  const handler = () => {}

  teardown(() => {
    try { AppState.removeEventListener('change', handler) } catch (e) {}
  })

  suite('addEventListener', () => {
    test('throws if the provided "eventType" is not supported', () => {
      assert.throws(() => AppState.addEventListener('foo', handler))
      assert.doesNotThrow(() => AppState.addEventListener('change', handler))
    })
  })

  suite('removeEventListener', () => {
    test('throws if the handler is not registered', () => {
      assert.throws(() => AppState.removeEventListener('change', handler))
    })

    test('throws if the provided "eventType" is not supported', () => {
      AppState.addEventListener('change', handler)
      assert.throws(() => AppState.removeEventListener('foo', handler))
      assert.doesNotThrow(() => AppState.removeEventListener('change', handler))
    })
  })
})