obj-ptrn-rest-skip-non-enumerable.js (1827B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-rest-skip-non-enumerable.case 3 // - src/dstr-binding/default/arrow-function.template 4 /*--- 5 description: Rest object doesn't contain non-enumerable properties (arrow function expression) 6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation 7 features: [object-rest, destructuring-binding] 8 flags: [generated] 9 includes: [propertyHelper.js] 10 info: | 11 ArrowFunction : ArrowParameters => ConciseBody 12 13 [...] 14 4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, scope, strict). 15 [...] 16 17 9.2.1 [[Call]] ( thisArgument, argumentsList) 18 19 [...] 20 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 21 [...] 22 23 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 24 25 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 26 [...] 27 28 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 29 30 [...] 31 23. Let iteratorRecord be Record {[[iterator]]: 32 CreateListIterator(argumentsList), [[done]]: false}. 33 24. If hasDuplicates is true, then 34 [...] 35 25. Else, 36 b. Let formalStatus be IteratorBindingInitialization for formals with 37 iteratorRecord and env as arguments. 38 [...] 39 ---*/ 40 var o = {a: 3, b: 4}; 41 Object.defineProperty(o, "x", { value: 4, enumerable: false }); 42 43 var callCount = 0; 44 var f; 45 f = ({...rest}) => { 46 assert.sameValue(rest.x, undefined); 47 48 verifyProperty(rest, "a", { 49 enumerable: true, 50 writable: true, 51 configurable: true, 52 value: 3 53 }); 54 55 verifyProperty(rest, "b", { 56 enumerable: true, 57 writable: true, 58 configurable: true, 59 value: 4 60 }); 61 callCount = callCount + 1; 62 }; 63 64 f(o); 65 assert.sameValue(callCount, 1, 'arrow function invoked exactly once'); 66 67 reportCompare(0, 0);