|  | // Copyright 2019 the V8 project authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  | const actual = []; | 
|  |  | 
|  | const options = { | 
|  | get localeMatcher() { | 
|  | actual.push("localeMatcher"); | 
|  | return undefined; | 
|  | }, | 
|  | get numberingSystem() { | 
|  | actual.push("numberingSystem"); | 
|  | return undefined; | 
|  | }, | 
|  | get style() { | 
|  | actual.push("style"); | 
|  | return undefined; | 
|  | }, | 
|  | }; | 
|  |  | 
|  | const expected = [ | 
|  | "localeMatcher", | 
|  | "numberingSystem", | 
|  | "style" | 
|  | ]; | 
|  |  | 
|  | let nf = new Intl.NumberFormat(undefined, options); | 
|  | assertEquals(actual.join(":"), expected.join(":")); |