async-func-decl-dstr-obj-rest-to-property-with-setter.js (1831B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-rest-to-property-with-setter.case 4 // - src/dstr-assignment-for-await/default/async-func-decl.template 5 /*--- 6 description: When DestructuringAssignmentTarget is an object property setter, 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 info: | 11 IterationStatement : 12 for await ( LeftHandSideExpression of AssignmentExpression ) Statement 13 14 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 15 AssignmentExpression, iterate). 16 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 17 keyResult, assignment, labelSet). 18 19 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 20 21 [...] 22 5. If destructuring is true and if lhsKind is assignment, then 23 a. Assert: lhs is a LeftHandSideExpression. 24 b. Let assignmentPattern be the parse of the source text corresponding to 25 lhs using AssignmentPattern as the goal symbol. 26 [...] 27 ---*/ 28 let settedValue; 29 let executedGetter = false; 30 let src = { 31 get y() { 32 executedGetter = true; 33 }, 34 set y(v) { 35 settedValue = v; 36 }, 37 }; 38 src.y = undefined; 39 40 let iterCount = 0; 41 async function fn() { 42 for await ({...src.y} of [{ x: 1, y: 2}]) { 43 assert.sameValue(settedValue.x, 1); 44 assert.sameValue(settedValue.y, 2); 45 assert(!executedGetter, "The property should not be accessed"); 46 47 iterCount += 1; 48 } 49 } 50 51 let promise = fn(); 52 53 promise 54 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 55 .then($DONE, $DONE);