async-gen-dstr-var-ary-ptrn-elision-step-err.js (2410B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding-for-await/ary-ptrn-elision-step-err.case 4 // - src/dstr-binding-for-await/error/for-await-of-async-gen-var.template 5 /*--- 6 description: Elision advances iterator and forwards abrupt completions (for-await-of statement) 7 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 8 features: [generators, destructuring-binding, async-iteration] 9 flags: [generated, async] 10 info: | 11 IterationStatement : 12 for await ( ForDeclaration of AssignmentExpression ) Statement 13 14 [...] 15 2. Return ? ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 16 lexicalBinding, labelSet, async). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 4. Let destructuring be IsDestructuring of lhs. 22 [...] 23 6. Repeat 24 [...] 25 j. If destructuring is false, then 26 [...] 27 k. Else 28 i. If lhsKind is assignment, then 29 [...] 30 ii. Else if lhsKind is varBinding, then 31 [...] 32 iii. Else, 33 1. Assert: lhsKind is lexicalBinding. 34 2. Assert: lhs is a ForDeclaration. 35 3. Let status be the result of performing BindingInitialization 36 for lhs passing nextValue and iterationEnv as arguments. 37 [...] 38 39 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 40 41 ArrayBindingPattern : [ Elision ] 42 43 1. Return the result of performing 44 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 45 as the argument. 46 47 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 48 49 Elision : , 50 51 1. If iteratorRecord.[[done]] is false, then 52 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 53 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 54 c. ReturnIfAbrupt(next). 55 56 ---*/ 57 var following = 0; 58 var iter = function* () { 59 throw new Test262Error(); 60 following += 1; 61 }(); 62 63 async function * gen() { 64 for await (var [,] of [iter]) { 65 return; 66 } 67 } 68 69 gen().next() 70 .then(_ => { 71 throw new Test262Error("Expected async function to reject, but resolved."); 72 }, ({ constructor }) => { 73 assert.sameValue(constructor, Test262Error); 74 assert.sameValue(following, 0, "iterator is properly closed"); 75 }) 76 .then($DONE, $DONE);