async-func-decl-dstr-obj-rest-same-name.js (1818B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-assignment-for-await/obj-rest-same-name.case 4 // - src/dstr-assignment-for-await/default/async-func-decl.template 5 /*--- 6 description: Proper setting in the values for rest name equal to a property name. (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 o = { 29 x: 42, 30 y: 39, 31 z: 'cheeseburger' 32 }; 33 34 let x, y, z; 35 36 let iterCount = 0; 37 async function fn() { 38 for await ({ x, ...z } of [o]) { 39 assert.sameValue(x, 42); 40 assert.sameValue(y, undefined); 41 assert.sameValue(z.y, 39); 42 assert.sameValue(z.z, 'cheeseburger'); 43 44 let keys = Object.getOwnPropertyNames(z); 45 assert.sameValue(keys.length, 2); 46 assert.sameValue(keys[0], 'y'); 47 assert.sameValue(keys[1], 'z'); 48 49 iterCount += 1; 50 } 51 } 52 53 let promise = fn(); 54 55 promise 56 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 57 .then($DONE, $DONE);