import * as chai from 'chai'; import * as chaiAsPromised from 'chai-as-promised'; declare const global: any; chai.should(); chai.use(chaiAsPromised); global.chai = chai; global.chaiAsPromised = chaiAsPromised; global.expect = chai.expect; global.AssertionError = chai.AssertionError; global.assert = chai.assert; global.Assertion = (chai as any).Assertion; //'Assertion' is not existing?