unscopables-with-in-nested-fn.js (2290B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/function-forms/unscopables-with-in-nested-fn.case 4 // - src/function-forms/default/async-gen-func-decl.template 5 /*--- 6 description: Symbol.unscopables behavior across scope boundaries (async generator function declaration) 7 esid: sec-asyncgenerator-definitions-instantiatefunctionobject 8 features: [globalThis, Symbol.unscopables, async-iteration] 9 flags: [generated, noStrict, async] 10 info: | 11 AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier 12 ( FormalParameters ) { AsyncGeneratorBody } 13 14 [...] 15 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody, 16 scope, strict). 17 [...] 18 19 20 ... 21 Let envRec be lex's EnvironmentRecord. 22 Let exists be ? envRec.HasBinding(name). 23 24 HasBinding 25 26 ... 27 If the withEnvironment flag of envRec is false, return true. 28 Let unscopables be ? Get(bindings, @@unscopables). 29 If Type(unscopables) is Object, then 30 Let blocked be ToBoolean(? Get(unscopables, N)). 31 If blocked is true, return false. 32 33 (The `with` Statement) Runtime Semantics: Evaluation 34 35 ... 36 Set the withEnvironment flag of newEnv’s EnvironmentRecord to true. 37 ... 38 39 ---*/ 40 let count = 0; 41 var v = 1; 42 globalThis[Symbol.unscopables] = { 43 v: true, 44 }; 45 46 { 47 count++; 48 49 50 var callCount = 0; 51 // Stores a reference `ref` for case evaluation 52 async function* ref(x) { 53 (function() { 54 count++; 55 with (globalThis) { 56 count++; 57 assert.sameValue(v, 1, 'The value of `v` is 1'); 58 } 59 })(); 60 (function() { 61 count++; 62 var v = x; 63 with (globalThis) { 64 count++; 65 assert.sameValue(v, 10, 'The value of `v` is 10'); 66 v = 20; 67 } 68 assert.sameValue(v, 20, 'The value of `v` is 20'); 69 assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1'); 70 })(); 71 assert.sameValue(v, 1, 'The value of `v` is 1'); 72 assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1'); 73 callCount = callCount + 1; 74 } 75 76 ref(10).next().then(() => { 77 assert.sameValue(callCount, 1, 'generator function invoked exactly once'); 78 }).then($DONE, $DONE); 79 80 count++; 81 } 82 assert.sameValue(count, 6, 'The value of `count` is 6');