Source code
Revision control
Copy as Markdown
Other Tools
// This file was procedurally generated from the following sources:
// - src/spread/obj-symbol-property.case
// - src/spread/default/array.template
/*---
description: Spread operation where source object contains Symbol properties (Array initializer)
esid: sec-runtime-semantics-arrayaccumulation
features: [Symbol, object-spread]
flags: [generated]
info: |
SpreadElement : ...AssignmentExpression
1. Let spreadRef be the result of evaluating AssignmentExpression.
2. Let spreadObj be ? GetValue(spreadRef).
3. Let iterator be ? GetIterator(spreadObj).
4. Repeat
a. Let next be ? IteratorStep(iterator).
b. If next is false, return nextIndex.
c. Let nextValue be ? IteratorValue(next).
d. Let status be CreateDataProperty(array, ToString(ToUint32(nextIndex)),
nextValue).
e. Assert: status is true.
f. Let nextIndex be nextIndex + 1.
Pending Runtime Semantics: PropertyDefinitionEvaluation
PropertyDefinition:...AssignmentExpression
1. Let exprValue be the result of evaluating AssignmentExpression.
2. Let fromValue be GetValue(exprValue).
3. ReturnIfAbrupt(fromValue).
4. Let excludedNames be a new empty List.
5. Return CopyDataProperties(object, fromValue, excludedNames).
---*/
let symbol = Symbol('foo');
let o = {};
o[symbol] = 1;
var callCount = 0;
(function(obj) {
assert.sameValue(obj[symbol], 1);
assert(Object.prototype.hasOwnProperty.call(obj, symbol), "symbol is an own property");
assert.sameValue(obj.c, 4);
assert.sameValue(obj.d, 5);
assert.sameValue(Object.keys(obj).length, 2);
callCount += 1;
}.apply(null, [{...o, c: 4, d: 5}]));
assert.sameValue(callCount, 1);
reportCompare(0, 0);