async-gen-decl-dstr-obj-prop-put-prop-ref-no-get.js (1700B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-prop-put-prop-ref-no-get.case 4 // - src/dstr-assignment-for-await/default/async-gen-decl.template 5 /*--- 6 description: If the DestructuringAssignmentTarget of an AssignmentElement is a PropertyReference, it should not be evaluated. (for-await-of statement in an async generator declaration) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [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 setValue; 29 let x = { 30 get y() { 31 throw new Test262Error('The property should not be accessed.'); 32 }, 33 set y(val) { 34 setValue = val; 35 } 36 }; 37 38 let iterCount = 0; 39 async function * fn() { 40 for await ({ a: x.y } of [{ a: 23 }]) { 41 assert.sameValue(setValue, 23); 42 iterCount += 1; 43 } 44 } 45 46 let promise = fn().next(); 47 48 promise 49 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 50 .then($DONE, $DONE);