metamask-extension/ui/app/selectors/tests/selectors.test.js

import assert from 'assert'
import { getAddressBook } from '../selectors.js'
import mockState from './selectors-test-data'

describe('selectors', () => {

  describe('getAddressBook()', () => {
    it('should return the address book', () => {
      assert.deepEqual(
        getAddressBook(mockState),
        [
          {
            'address': '0x06195827297c7a80a443b6894d3bdb8824b43896',
            'chainId': '3',
            'isEns': false,
            'memo': '',
            'name': 'Address Book Account 1',
          },
        ],
      )
    })
  })

})