async-func-decl-dstr-obj-rest-to-property.js (1725B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-rest-to-property.case 4 // - src/dstr-assignment-for-await/default/async-func-decl.template 5 /*--- 6 description: When DestructuringAssignmentTarget is an object property, its value should be binded as rest object. (for-await-of statement in an async function declaration) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [object-rest, destructuring-binding, async-iteration] 9 flags: [generated, async] 10 includes: [propertyHelper.js] 11 info: | 12 IterationStatement : 13 for await ( LeftHandSideExpression of AssignmentExpression ) Statement 14 15 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 16 AssignmentExpression, iterate). 17 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 18 keyResult, assignment, labelSet). 19 20 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 21 22 [...] 23 5. If destructuring is true and if lhsKind is assignment, then 24 a. Assert: lhs is a LeftHandSideExpression. 25 b. Let assignmentPattern be the parse of the source text corresponding to 26 lhs using AssignmentPattern as the goal symbol. 27 [...] 28 ---*/ 29 let src = {}; 30 31 let iterCount = 0; 32 async function fn() { 33 for await ({...src.y} of [{ x: 1, y: 2}]) { 34 assert.sameValue(src.y.x, 1); 35 assert.sameValue(src.y.y, 2); 36 37 verifyProperty(src, "y", { 38 enumerable: true, 39 writable: true, 40 configurable: true 41 }); 42 43 iterCount += 1; 44 } 45 } 46 47 let promise = fn(); 48 49 promise 50 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 51 .then($DONE, $DONE);