[test] add FunctionMirror and PromiseMirror tests for async functions

test/mjsunit/harmony/mirror-async-function-promise.js

-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --expose-debug-as debug
+// Flags: --expose-debug-as debug --harmony-async-await --allow-natives-syntax
 // Test the mirror object for promises.
 
+var AsyncFunction = (async function() {}).constructor;
+
 function MirrorRefCache(json_refs) {
   var tmp = eval('(' + json_refs + ')');
   this.refs_ = [];
   for (var i = 0; i < tmp.length; i++) {
     this.refs_[tmp[i].handle] = tmp[i];
   }
 }
 
 MirrorRefCache.prototype.lookup = function(handle) {
   return this.refs_[handle];
@@ skipping 28 matching lines @@
   var fromJSON = eval('(' + json + ')');
   assertEquals('promise', fromJSON.type);
   assertEquals('Object', fromJSON.className);
   assertEquals('function', refs.lookup(fromJSON.constructorFunction.ref).type);
   assertEquals('Promise', refs.lookup(fromJSON.constructorFunction.ref).name);
   assertEquals(status, fromJSON.status);
   assertEquals(value, refs.lookup(fromJSON.promiseValue.ref).value);
 }
 
 // Test a number of different promises.
-var resolved = new Promise(function(resolve, reject) { resolve() });
-var rejected = new Promise(function(resolve, reject) { reject() });
-var pending = new Promise(function(resolve, reject) {});
+var resolved = (async function() {})();
+var rejected = (async function() { throw undefined; })();
+var pending = (async function() { await 1; })();
 
 testPromiseMirror(resolved, "resolved", undefined);
 testPromiseMirror(rejected, "rejected", undefined);
 testPromiseMirror(pending, "pending", undefined);
 
-var resolvedv = new Promise(function(resolve, reject) { resolve('resolve') });
-var rejectedv = new Promise(function(resolve, reject) { reject('reject') });
-var thrownv = new Promise(function(resolve, reject) { throw 'throw' });
+var resolvedv = (async function() { return "resolve"; })();
+var rejectedv = (async function() { return Promise.reject("reject"); })();
+var thrownv = (async function() { throw "throw"; })();
 
 testPromiseMirror(resolvedv, "resolved", 'resolve');
 testPromiseMirror(rejectedv, "rejected", 'reject');
 testPromiseMirror(thrownv, "rejected", 'throw');
 
 // Test internal properties of different promises.
-var m1 = debug.MakeMirror(new Promise(
-    function(resolve, reject) { resolve(1) }));
+var m1 = debug.MakeMirror((async function() { return 1; })());
 var ip = m1.internalProperties();
 assertEquals(2, ip.length);
 assertEquals("[[PromiseStatus]]", ip[0].name());
 assertEquals("[[PromiseValue]]", ip[1].name());
 assertEquals("resolved", ip[0].value().value());
 assertEquals(1, ip[1].value().value());
 
-var m2 = debug.MakeMirror(new Promise(function(resolve, reject) { reject(2) }));
+var m2 = debug.MakeMirror((async function() { throw 2; })());
 ip = m2.internalProperties();
 assertEquals("rejected", ip[0].value().value());
 assertEquals(2, ip[1].value().value());
 
-var m3 = debug.MakeMirror(new Promise(function(resolve, reject) { }));
+var m3 = debug.MakeMirror((async function() { await 1; })());
 ip = m3.internalProperties();
 assertEquals("pending", ip[0].value().value());
 assertEquals("undefined", typeof(ip[1].value().value()));
+
+%RunMicrotasks();