mirror of https://github.com/tc39/test262.git
77 lines
1.9 KiB
JavaScript
77 lines
1.9 KiB
JavaScript
// 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-generator-function-definitions-runtime-semantics-evaluation
|
|
es6id: 14.4.14
|
|
description: >
|
|
"Return" completion returned when `return` method is not defined
|
|
info: |
|
|
YieldExpression : yield * AssignmentExpression
|
|
|
|
1. Let exprRef be the result of evaluating AssignmentExpression.
|
|
2. Let value be ? GetValue(exprRef).
|
|
3. Let iterator be ? GetIterator(value).
|
|
4. Let received be NormalCompletion(undefined).
|
|
5. Repeat
|
|
a. If received.[[Type]] is normal, then
|
|
[...]
|
|
b. Else if received.[[Type]] is throw, then
|
|
[...]
|
|
c. Else,
|
|
i. Assert: received.[[Type]] is return.
|
|
ii. Let return be ? GetMethod(iterator, "return").
|
|
iii. If return is undefined, return Completion(received).
|
|
features: [generators, Symbol.iterator]
|
|
---*/
|
|
|
|
var badIter = {};
|
|
var throwCount = 0;
|
|
var returnCount = 0;
|
|
var hitNextStatement = false;
|
|
var hitCatch = false;
|
|
var hitFinally = false;
|
|
var spyResult = {
|
|
next: function() {
|
|
return { done: false };
|
|
}
|
|
};
|
|
Object.defineProperty(spyResult, 'throw', {
|
|
get: function() {
|
|
throwCount += 1;
|
|
}
|
|
});
|
|
Object.defineProperty(spyResult, 'return', {
|
|
get: function() {
|
|
returnCount += 1;
|
|
}
|
|
});
|
|
badIter[Symbol.iterator] = function() {
|
|
return spyResult;
|
|
};
|
|
function* g() {
|
|
try {
|
|
yield * badIter;
|
|
hitNextStatement = true;
|
|
} catch (_) {
|
|
hitCatch = true;
|
|
} finally {
|
|
hitFinally = true;
|
|
}
|
|
}
|
|
var iter = g();
|
|
|
|
iter.next();
|
|
iter.return();
|
|
|
|
assert.sameValue(throwCount, 0, '`throw` property access');
|
|
assert.sameValue(returnCount, 1, '`return` property access');
|
|
assert.sameValue(
|
|
hitFinally, true, 'Generator execution was resumed'
|
|
);
|
|
assert.sameValue(
|
|
hitNextStatement, false, 'Abrupt completion interrupted control flow'
|
|
);
|
|
assert.sameValue(
|
|
hitCatch, false, 'Abrupt completion not interpreted as "throw"'
|
|
);
|