unscopables-with-in-nested-fn.js (2272B)
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-expr.template 5 /*--- 6 description: Symbol.unscopables behavior across scope boundaries (async generator function expression) 7 esid: sec-asyncgenerator-definitions-evaluation 8 features: [globalThis, Symbol.unscopables, async-iteration] 9 flags: [generated, noStrict, 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 ... 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 var ref; 53 ref = async function*(x) { 54 (function() { 55 count++; 56 with (globalThis) { 57 count++; 58 assert.sameValue(v, 1, 'The value of `v` is 1'); 59 } 60 })(); 61 (function() { 62 count++; 63 var v = x; 64 with (globalThis) { 65 count++; 66 assert.sameValue(v, 10, 'The value of `v` is 10'); 67 v = 20; 68 } 69 assert.sameValue(v, 20, 'The value of `v` is 20'); 70 assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1'); 71 })(); 72 assert.sameValue(v, 1, 'The value of `v` is 1'); 73 assert.sameValue(globalThis.v, 1, 'The value of globalThis.v is 1'); 74 callCount = callCount + 1; 75 }; 76 77 ref(10).next().then(() => { 78 assert.sameValue(callCount, 1, 'generator function invoked exactly once'); 79 }).then($DONE, $DONE); 80 81 count++; 82 } 83 assert.sameValue(count, 6, 'The value of `count` is 6');