ary-ptrn-empty.js (1152B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/dstr-binding/ary-ptrn-empty.case 4 // - src/dstr-binding/default/async-gen-func-expr.template 5 /*--- 6 description: No iteration occurs for an "empty" array binding pattern (async generator function expression) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [generators, async-iteration] 9 flags: [generated, async] 10 info: | 11 AsyncGeneratorExpression : async [no LineTerminator here] function * ( FormalParameters ) { 12 AsyncGeneratorBody } 13 14 [...] 15 3. Let closure be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, 16 AsyncGeneratorBody, scope, strict). 17 [...] 18 19 20 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 21 22 ArrayBindingPattern : [ ] 23 24 1. Return NormalCompletion(empty). 25 26 ---*/ 27 var iterations = 0; 28 var iter = function*() { 29 iterations += 1; 30 }(); 31 32 33 var callCount = 0; 34 var f; 35 f = async function*([]) { 36 assert.sameValue(iterations, 0); 37 callCount = callCount + 1; 38 }; 39 40 f(iter).next().then(() => { 41 assert.sameValue(callCount, 1, 'invoked exactly once'); 42 }).then($DONE, $DONE);