expression-yield-as-statement.js (1519B)
1 // |reftest| async 2 // Copyright 2017 the V8 project authors. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 author: Caitlin Potter <caitp@igalia.com> 7 esid: sec-generator-function-definitions 8 description: > 9 `yield` is a valid statement within async generator function bodies. 10 flags: [async] 11 features: [async-iteration] 12 ---*/ 13 14 var g1 = async function*() { yield; }; 15 var g2 = async function*() { yield 1; }; 16 17 var iter1 = g1(); 18 iter1.next().then(function(result) { 19 assert.sameValue( 20 result.value, undefined, "Without right-hand-side: first result `value`"); 21 assert.sameValue( 22 result.done, false, "Without right-hand-side: first result `done` flag"); 23 }).then(undefined, $DONE); 24 iter1.next().then(function(result) { 25 assert.sameValue( 26 result.value, undefined, "Without right-hand-side: second result `value`"); 27 assert.sameValue( 28 result.done, true, "Without right-hand-side: second result `done` flag"); 29 }).then(undefined, $DONE); 30 31 var iter2 = g2(); 32 iter2.next().then(function(result) { 33 assert.sameValue( 34 result.value, 1, "With right-hand-side: first result `value`"); 35 assert.sameValue( 36 result.done, false, "With right-hand-side: first result `done` flag"); 37 }).then(undefined, $DONE); 38 iter2.next().then(function(result) { 39 assert.sameValue( 40 result.value, undefined, "With right-hand-side: second result `value`"); 41 assert.sameValue( 42 result.done, true, "With right-hand-side: second result `done` flag"); 43 }).then($DONE, $DONE);