| // Copyright (C) 2014 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 21.1.5.2.1 |
| description: > |
| Iteration should respect UTF-16-encoded Unicode code points specified via |
| surrogate pairs. |
| features: [Symbol.iterator] |
| ---*/ |
| |
| var lo = '\uD834'; |
| var hi = '\uDF06'; |
| var pair = lo + hi; |
| var string = 'a' + pair + 'b' + lo + pair + hi + lo; |
| var iterator = string[Symbol.iterator](); |
| var result; |
| |
| result = iterator.next(); |
| assert.sameValue(result.value, 'a', 'First normal code point `value`'); |
| assert.sameValue(result.done, false, 'First normal code point `done` flag'); |
| |
| result = iterator.next(); |
| assert.sameValue( |
| result.value, pair, 'Surrogate pair `value` (between normal code points)' |
| ); |
| assert.sameValue( |
| result.done, false, 'Surrogate pair `done` flag (between normal code points)' |
| ); |
| |
| result = iterator.next(); |
| assert.sameValue(result.value, 'b', 'Second normal code point `value`'); |
| assert.sameValue(result.done, false, 'Second normal code point `done` flag'); |
| |
| result = iterator.next(); |
| assert.sameValue( |
| result.value, |
| lo, |
| 'Lone lower code point `value` (following normal code point)' |
| ); |
| assert.sameValue( |
| result.done, |
| false, |
| 'Lone lower code point `done` flag (following normal code point)' |
| ); |
| |
| result = iterator.next(); |
| assert.sameValue( |
| result.value, |
| pair, |
| 'Surrogate pair `value` (between lone lower- and upper- code points)' |
| ); |
| assert.sameValue( |
| result.done, |
| false, |
| 'Surrogate pair `done` flag (between lone lower- and upper- code points)' |
| ); |
| |
| result = iterator.next(); |
| assert.sameValue(result.value, hi, 'Lone upper code point `value`'); |
| assert.sameValue(result.done, false, 'Lone upper code point `done` flag'); |
| |
| result = iterator.next(); |
| assert.sameValue( |
| result.value, |
| lo, |
| 'Lone lower code point `value` (following lone upper code point)' |
| ); |
| assert.sameValue( |
| result.done, |
| false, |
| 'Lone lower code point `done` flag (following lone upper code point)' |
| ); |
| |
| result = iterator.next(); |
| assert.sameValue(result.value, undefined, 'Exhausted result `value`'); |
| assert.sameValue(result.done, true, 'Exhausted result `done` flag'); |
| |
| result = iterator.next(); |
| assert.sameValue( |
| result.value, undefined, 'Exhausted result `value` (repeated request)' |
| ); |
| assert.sameValue( |
| result.done, true, 'Exhausted result `done` flag (repeated request' |
| ); |