named-yield-spread-arr-single.js (1287B)
1 // |reftest| async 2 // This file was procedurally generated from the following sources: 3 // - src/async-generators/yield-spread-arr-single.case 4 // - src/async-generators/default/async-expression-named.template 5 /*--- 6 description: Use yield value in a array spread position (Named async generator expression) 7 esid: prod-AsyncGeneratorExpression 8 features: [async-iteration] 9 flags: [generated, async] 10 info: | 11 Async Generator Function Definitions 12 13 AsyncGeneratorExpression : 14 async [no LineTerminator here] function * BindingIdentifier ( FormalParameters ) { 15 AsyncGeneratorBody } 16 17 18 Array Initializer 19 20 SpreadElement[Yield, Await]: 21 ...AssignmentExpression[+In, ?Yield, ?Await] 22 23 ---*/ 24 var arr = ['a', 'b', 'c']; 25 26 27 var callCount = 0; 28 29 var gen = async function *g() { 30 callCount += 1; 31 yield [...yield]; 32 }; 33 34 var iter = gen(); 35 36 iter.next(false); 37 var item = iter.next(arr); 38 39 item.then(({ done, value }) => { 40 assert.notSameValue(value, arr, 'value is a new array'); 41 assert(Array.isArray(value), 'value is an Array exotic object'); 42 assert.sameValue(value.length, 3) 43 assert.sameValue(value[0], 'a'); 44 assert.sameValue(value[1], 'b'); 45 assert.sameValue(value[2], 'c'); 46 assert.sameValue(done, false); 47 }).then($DONE, $DONE); 48 49 assert.sameValue(callCount, 1);