params-trailing-comma-multiple.js (2221B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/function-forms/params-trailing-comma-multiple.case 4 // - src/function-forms/default/cls-expr-async-meth-static.template 5 /*--- 6 description: A trailing comma should not increase the respective length, using multiple parameters (static class expression async method) 7 esid: sec-class-definitions-runtime-semantics-evaluation 8 features: [async-functions] 9 flags: [generated, async] 10 info: | 11 ClassExpression : class BindingIdentifieropt ClassTail 12 13 1. If BindingIdentifieropt is not present, let className be undefined. 14 2. Else, let className be StringValue of BindingIdentifier. 15 3. Let value be the result of ClassDefinitionEvaluation of ClassTail 16 with argument className. 17 [...] 18 19 14.5.14 Runtime Semantics: ClassDefinitionEvaluation 20 21 21. For each ClassElement m in order from methods 22 a. If IsStatic of m is false, then 23 b. Else, 24 Let status be the result of performing PropertyDefinitionEvaluation 25 for m with arguments F and false. 26 [...] 27 28 Runtime Semantics: PropertyDefinitionEvaluation 29 30 AsyncMethod : async PropertyName ( UniqueFormalParameters ) { AsyncFunctionBody } 31 32 1. Let propKey be the result of evaluating PropertyName. 33 2. ReturnIfAbrupt(propKey). 34 3. If the function code for this AsyncMethod is strict mode code, let strict be true. Otherwise 35 let strict be false. 36 4. Let scope be the LexicalEnvironment of the running execution context. 37 5. Let closure be ! AsyncFunctionCreate(Method, UniqueFormalParameters, AsyncFunctionBody, 38 scope, strict). 39 [...] 40 41 42 Trailing comma in the parameters list 43 44 14.1 Function Definitions 45 46 FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] , 47 ---*/ 48 49 var callCount = 0; 50 var C = class { 51 static async method(a, b,) { 52 assert.sameValue(a, 42); 53 assert.sameValue(b, 39); 54 callCount = callCount + 1; 55 } 56 } 57 58 // Stores a reference `ref` for case evaluation 59 var ref = C.method; 60 61 ref(42, 39, 1).then(() => { 62 assert.sameValue(callCount, 1, 'method invoked exactly once'); 63 }).then($DONE, $DONE); 64 65 assert.sameValue(ref.length, 2, 'length is properly set');