| // 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.setmonth |
| es6id: 20.3.4.25 |
| description: Type coercion of provided "month" |
| info: | |
| 1. Let t be ? thisTimeValue(this value). |
| 2. If t is NaN, let t be +0; otherwise, let t be LocalTime(t). |
| 3. Let y be ? ToNumber(year). |
| 4. If month is not specified, let m be MonthFromTime(t); otherwise, let m be |
| ? ToNumber(month). |
| 5. If date is not specified, let dt be DateFromTime(t); otherwise, let dt be |
| ? ToNumber(date). |
| 6. Let newDate be MakeDate(MakeDay(y, m, dt), TimeWithinDay(t)). |
| 7. Let u be TimeClip(UTC(newDate)). |
| 8. Set the [[DateValue]] internal slot of this Date object to u. |
| 9. Return u. |
| ---*/ |
| |
| var date = new Date(2016, 6, 7, 11, 36, 23, 2); |
| var callCount = 0; |
| var arg = { |
| valueOf: function() { |
| args = arguments; |
| thisValue = this; |
| callCount += 1; |
| return 2; |
| } |
| }; |
| var args, thisValue, returnValue; |
| |
| returnValue = date.setMonth(arg); |
| |
| assert.sameValue(callCount, 1, 'invoked exactly once'); |
| assert.sameValue(args.length, 0, 'invoked without arguments'); |
| assert.sameValue(thisValue, arg, '"this" value'); |
| assert.sameValue( |
| returnValue, |
| new Date(2016, 2, 7, 11, 36, 23, 2).getTime(), |
| 'application of specified value' |
| ); |
| |
| returnValue = date.setMonth(null); |
| |
| assert.sameValue( |
| returnValue, |
| new Date(2016, 0, 7, 11, 36, 23, 2).getTime(), |
| 'null' |
| ); |
| |
| returnValue = date.setMonth(true); |
| |
| assert.sameValue( |
| returnValue, |
| new Date(2016, 1, 7, 11, 36, 23, 2).getTime(), |
| 'true' |
| ); |
| |
| returnValue = date.setMonth(false); |
| |
| assert.sameValue( |
| returnValue, |
| new Date(2016, 0, 7, 11, 36, 23, 2).getTime(), |
| 'false' |
| ); |
| |
| returnValue = date.setMonth(' +00200.000E-0002 '); |
| |
| assert.sameValue( |
| returnValue, |
| new Date(2016, 2, 7, 11, 36, 23, 2).getTime(), |
| 'string' |
| ); |
| |
| returnValue = date.setMonth(undefined); |
| |
| assert.sameValue(returnValue, NaN, 'undefined'); |