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Add replacement tests for destructuring evaluation order with property reference as target

This commit is contained in:
André Bargull 2017-09-16 17:00:56 +02:00
parent 58111fff7b
commit 87e259c6e5
2 changed files with 155 additions and 0 deletions
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80
test/language/expressions/assignment/destructuring/iterator-destructuring-property-reference-target-evaluation-order.js Normal file
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// Copyright (C) 2017 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-runtime-semantics-iteratordestructuringassignmentevaluation
description: >
Ensure correct evaluation order when destructuring target is property reference.
info: |
12.15.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation
AssignmentElement : DestructuringAssignmentTarget Initializer
1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
a. Let lref be the result of evaluating DestructuringAssignmentTarget.
b. ReturnIfAbrupt(lref).
2. If iteratorRecord.[[Done]] is false, then
a. Let next be IteratorStep(iteratorRecord.[[Iterator]]).
...
3. If iteratorRecord.[[Done]] is true, let value be undefined.
...
5. Else, let v be value.
...
8. Return ? PutValue(lref, v).
features: [Symbol.iterator]
includes: [compareArray.js]
---*/
var log = [];
function source() {
log.push("source");
var iterator = {
next: function() {
log.push("iterator-step");
return {
get done() {
log.push("iterator-done");
return true;
},
get value() {
// Note: This getter shouldn't be called.
log.push("iterator-value");
}
};
}
};
var source = {};
source[Symbol.iterator] = function() {
log.push("iterator");
return iterator;
};
return source;
}
function target() {
log.push("target");
return target = {
set q(v) {
log.push("set");
}
};
}
function targetKey() {
log.push("target-key");
return {
toString: function() {
log.push("target-key-tostring");
return "q";
}
};
}
([target()[targetKey()]] = source());
assert.compareArray(log, [
"source", "iterator",
"target", "target-key", "target-key-tostring",
"iterator-step", "iterator-done",
"set",
]);

75
test/language/expressions/assignment/destructuring/keyed-destructuring-property-reference-target-evaluation-order.js Normal file
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// Copyright (C) 2017 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-runtime-semantics-keyeddestructuringassignmentevaluation
description: >
Ensure correct evaluation order when destructuring target is property reference.
info: |
12.15.5.2 Runtime Semantics: DestructuringAssignmentEvaluation
AssignmentProperty : PropertyName : AssignmentElement
1. Let name be the result of evaluating PropertyName.
2. ReturnIfAbrupt(name).
3. Return the result of performing KeyedDestructuringAssignmentEvaluation of
AssignmentElement with value and name as the arguments.
12.15.5.4 Runtime Semantics: KeyedDestructuringAssignmentEvaluation
1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an ArrayLiteral, then
a. Let lref be the result of evaluating DestructuringAssignmentTarget.
b. ReturnIfAbrupt(lref).
2. Let v be ? GetV(value, propertyName).
...
4. Else, let rhsValue be v.
...
7. Return ? PutValue(lref, rhsValue).
includes: [compareArray.js]
---*/
var log = [];
function source() {
log.push("source");
return {
get p() {
log.push("get");
}
};
}
function target() {
log.push("target");
return {
set q(v) {
log.push("set");
}
};
}
function sourceKey() {
log.push("source-key");
return {
toString: function() {
log.push("source-key-tostring");
return "p";
}
};
}
function targetKey() {
log.push("target-key");
return {
toString: function() {
log.push("target-key-tostring");
return "q";
}
};
}
({[sourceKey()]: target()[targetKey()]} = source());
assert.compareArray(log, [
"source", "source-key", "source-key-tostring",
"target", "target-key", "target-key-tostring",
"get", "set",
]);