async-func-dstr-let-obj-ptrn-rest-skip-non-enumerable.js (2100B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/obj-ptrn-rest-skip-non-enumerable.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-let.template 5 /*--- 6 description: Rest object doesn't contain non-enumerable properties (for-await-of statement) 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 ( ForDeclaration of AssignmentExpression ) Statement 14 15 [...] 16 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 17 lexicalBinding, labelSet, async). 18 19 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 20 21 [...] 22 4. Let destructuring be IsDestructuring of lhs. 23 [...] 24 6. Repeat 25 [...] 26 j. If destructuring is false, then 27 [...] 28 k. Else 29 i. If lhsKind is assignment, then 30 [...] 31 ii. Else if lhsKind is varBinding, then 32 [...] 33 iii. Else, 34 1. Assert: lhsKind is lexicalBinding. 35 2. Assert: lhs is a ForDeclaration. 36 3. Let status be the result of performing BindingInitialization 37 for lhs passing nextValue and iterationEnv as arguments. 38 [...] 39 ---*/ 40 var o = {a: 3, b: 4}; 41 Object.defineProperty(o, "x", { value: 4, enumerable: false }); 42 43 var iterCount = 0; 44 45 async function fn() { 46 for await (let {...rest} of [o]) { 47 assert.sameValue(rest.a, 3); 48 assert.sameValue(rest.b, 4); 49 assert.sameValue(rest.x, undefined); 50 51 verifyProperty(rest, "a", { 52 enumerable: true, 53 writable: true, 54 configurable: true, 55 value: 3 56 }); 57 58 verifyProperty(rest, "b", { 59 enumerable: true, 60 writable: true, 61 configurable: true, 62 value: 4 63 }); 64 65 iterCount += 1; 66 } 67 } 68 69 fn() 70 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 71 .then($DONE, $DONE);