async-func-dstr-var-async-obj-ptrn-rest-val-obj.js (2063B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/obj-ptrn-rest-val-obj.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-func-var-async.template 5 /*--- 6 description: Rest object contains just unextracted data (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 41 var iterCount = 0; 42 var asyncIter = (async function*() { 43 yield* [{x: 1, y: 2, a: 5, b: 3}]; 44 })(); 45 46 async function fn() { 47 for await (var {a, b, ...rest} of asyncIter) { 48 assert.sameValue(rest.a, undefined); 49 assert.sameValue(rest.b, undefined); 50 51 verifyProperty(rest, "x", { 52 enumerable: true, 53 writable: true, 54 configurable: true, 55 value: 1 56 }); 57 58 verifyProperty(rest, "y", { 59 enumerable: true, 60 writable: true, 61 configurable: true, 62 value: 2 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);