yield-spread-arr-single.js (1148B)
1 // This file was procedurally generated from the following sources: 2 // - src/generators/yield-spread-arr-single.case 3 // - src/generators/default/expression.template 4 /*--- 5 description: Use yield value in a array spread position (Unnamed generator expression) 6 esid: prod-GeneratorExpression 7 features: [generators] 8 flags: [generated] 9 info: | 10 14.4 Generator Function Definitions 11 12 GeneratorExpression: 13 function * BindingIdentifier opt ( FormalParameters ) { GeneratorBody } 14 15 16 Array Initializer 17 18 SpreadElement[Yield, Await]: 19 ...AssignmentExpression[+In, ?Yield, ?Await] 20 ---*/ 21 var arr = ['a', 'b', 'c']; 22 23 var callCount = 0; 24 25 var gen = function *() { 26 callCount += 1; 27 yield [...yield]; 28 }; 29 30 var iter = gen(); 31 32 iter.next(false); 33 var item = iter.next(arr); 34 var value = item.value; 35 36 assert.notSameValue(value, arr, 'value is a new array'); 37 assert(Array.isArray(value), 'value is an Array exotic object'); 38 assert.sameValue(value.length, 3) 39 assert.sameValue(value[0], 'a'); 40 assert.sameValue(value[1], 'b'); 41 assert.sameValue(value[2], 'c'); 42 assert.sameValue(item.done, false); 43 44 assert.sameValue(callCount, 1); 45 46 reportCompare(0, 0);