text: // Copyright (C) 2016 the V8 project authors. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  /*---
  esid: sec-object.prototype.tostring
  description: Proxy of an array is treated as an array
  info: |
    [...]
    3. Let O be ToObject(this value).
    4. Let isArray be ? IsArray(O).
    5. If isArray is true, let builtinTag be "Array".
    [...]
  
    7.2.2 IsArray
  
    [...]
    3. If argument is a Proxy exotic object, then
       a. If the value of the [[ProxyHandler]] internal slot of argument is null,
          throw a TypeError exception.
       b. Let target be the value of the [[ProxyTarget]] internal slot of
          argument.
       c. Return ? IsArray(target).
  features: [Proxy]
  ---*/
  
  var objectProxy = new Proxy({}, {});
  var arrayProxy = new Proxy([], {});
  var arrayProxyProxy = new Proxy(arrayProxy, {});
  
  assert.sameValue(
    Object.prototype.toString.call(objectProxy), '[object Object]'
  );
  assert.sameValue(
    Object.prototype.toString.call(arrayProxy), '[object Array]', 'array proxy'
  );
  assert.sameValue(
    Object.prototype.toString.call(arrayProxyProxy),
    '[object Array]',
    'proxy for array proxy'
  );
  