| // Copyright (C) 2013 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 25.3.1.4 |
| description: > |
| When a generator is paused within the `try` block of a `try..catch` |
| statement, `throw` should interrupt control flow as if a `throw` statement |
| had appeared at that location in the function body. |
| features: [generators] |
| ---*/ |
| |
| var unreachable = 0; |
| function* g() { |
| yield 1; |
| try { |
| yield 2; |
| unreachable += 1; |
| } catch (e) { |
| yield e; |
| } |
| yield 3; |
| } |
| var iter, result, exception; |
| |
| exception = new Test262Error(); |
| iter = g(); |
| |
| result = iter.next(); |
| assert.sameValue(result.value, 1, 'First result `value`'); |
| assert.sameValue(result.done, false, 'First result `done` flag'); |
| |
| result = iter.next(); |
| assert.sameValue(result.value, 2, 'Second result `value`'); |
| assert.sameValue(result.done, false, 'Second result `done` flag'); |
| |
| result = iter.throw(exception); |
| assert.sameValue(result.value, exception, 'Third result `value`'); |
| assert.sameValue(result.done, false, 'Third result `done` flag'); |
| |
| assert.sameValue( |
| unreachable, |
| 0, |
| 'statement following `yield` not executed (following `throw`)' |
| ); |
| |
| result = iter.next(); |
| assert.sameValue(result.value, 3, 'Fourth result `done` flag'); |
| assert.sameValue(result.done, false, 'Fourth result `value`'); |
| assert.sameValue( |
| unreachable, |
| 0, |
| 'statement following `yield` not executed (following `catch`)' |
| ); |
| |
| result = iter.next(); |
| assert.sameValue( |
| result.value, undefined, 'Result `value` is undefined when done' |
| ); |
| assert.sameValue(result.done, true, 'Result `done` flag is `true` when done'); |
| assert.sameValue( |
| unreachable, 0, 'statement following `yield` not executed (once "completed")' |
| ); |
| |
| iter.next(); |