| // 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-date.prototype.setyear |
| es6id: B.2.4.2 |
| es5id: B.2.5 |
| description: Behavior when year value coerces to NaN |
| info: | |
| [...] |
| 3. Let y be ? ToNumber(year). |
| 4. If y is NaN, set the [[DateValue]] internal slot of this Date object to |
| NaN and return NaN. |
| features: [Symbol] |
| ---*/ |
| |
| var date; |
| |
| date = new Date(); |
| assert.sameValue(date.setYear(), NaN, 'return value (no argument)'); |
| assert.sameValue( |
| date.valueOf(), NaN, '[[DateValue]] internal slot (no argument)' |
| ); |
| |
| date = new Date(); |
| assert.sameValue(date.setYear(NaN), NaN, 'return value (literal NaN)'); |
| assert.sameValue( |
| date.valueOf(), NaN, '[[DateValue]] internal slot (literal NaN)' |
| ); |
| |
| date = new Date(); |
| assert.sameValue( |
| date.setYear('not a number'), NaN, 'return value (NaN from ToNumber)' |
| ); |
| assert.sameValue( |
| date.valueOf(), NaN, '[[DateValue]] internal slot (NaN from ToNumber)' |
| ); |