| // 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 "start" integer conversion triggers an abrupt completion |
| info: | |
| [...] |
| 3. Let intStart be ? ToInteger(start). |
| features: [Symbol] |
| ---*/ |
| |
| var lengthCallCount = 0; |
| var symbol = Symbol(''); |
| var start = { |
| valueOf: function() { |
| throw new Test262Error(); |
| } |
| }; |
| var len = { |
| valueOf: function() { |
| lengthCallCount += 1; |
| } |
| }; |
| |
| assert.throws(Test262Error, function() { |
| ''.substr(start, len); |
| }); |
| |
| assert.throws(TypeError, function() { |
| ''.substr(symbol, len); |
| }); |
| |
| assert.sameValue(lengthCallCount, 0); |