| // 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-string.prototype.substr |
| es6id: B.2.3.1 |
| description: Behavior when "this" value is not Object-coercible |
| info: | |
| 1. Let O be ? RequireObjectCoercible(this value). |
| ---*/ |
| |
| var substr = String.prototype.substr; |
| |
| assert.sameValue(typeof substr, 'function'); |
| |
| assert.throws(TypeError, function() { |
| substr.call(undefined); |
| }, 'undefined'); |
| |
| assert.throws(TypeError, function() { |
| substr.call(null); |
| }, 'null'); |
