async-gen-dstr-var-async-obj-ptrn-rest-getter.js (1957B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/obj-ptrn-rest-getter.case 4 // - src/dstr-binding-for-await/default/for-await-of-async-gen-var-async.template 5 /*--- 6 description: Getter is called when obj is being deconstructed to a rest Object (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 count = 0; 41 42 var iterCount = 0; 43 var asyncIter = (async function*() { 44 yield* [{ get v() { count++; return 2; } }]; 45 })(); 46 47 async function *fn() { 48 for await (var {...x} of asyncIter) { 49 assert.sameValue(x.v, 2); 50 assert.sameValue(count, 1); 51 52 verifyProperty(x, "v", { 53 enumerable: true, 54 writable: true, 55 configurable: true, 56 value: 2 57 }); 58 59 iterCount += 1; 60 } 61 } 62 63 fn().next() 64 .then(() => assert.sameValue(iterCount, 1, 'iteration occurred as expected'), $DONE) 65 .then($DONE, $DONE);