[test] add FunctionMirror and PromiseMirror tests for async functions

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

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+// 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 functions.
 
+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 26 matching lines @@
   assertTrue(mirror.prototypeObject() instanceof debug.Mirror);
 
   // Test text representation
   assertEquals(f.toString(), mirror.toText());
 
   // Parse JSON representation and check.
   var fromJSON = eval('(' + json + ')');
   assertEquals('function', fromJSON.type);
   assertEquals('Function', fromJSON.className);
   assertEquals('function', refs.lookup(fromJSON.constructorFunction.ref).type);
-  assertEquals('Function', refs.lookup(fromJSON.constructorFunction.ref).name);
+  assertEquals('AsyncFunction',
+               refs.lookup(fromJSON.constructorFunction.ref).name);
   assertTrue(fromJSON.resolved);
   assertEquals(f.name, fromJSON.name);
   assertEquals(f.toString(), fromJSON.source);
 
   // Check the formatted text (regress 1142074).
   assertEquals(f.toString(), fromJSON.text);
 }
 
 
 // Test a number of different functions.
-testFunctionMirror(function(){});
-testFunctionMirror(function a(){return 1;});
-testFunctionMirror(Math.sin);
-testFunctionMirror((function(){}).bind({}), "Object");
+testFunctionMirror(async function(){});
+testFunctionMirror(AsyncFunction());
+testFunctionMirror(new AsyncFunction());
+testFunctionMirror(async() => {});
+testFunctionMirror(async function a(){return 1;});
+testFunctionMirror(({ async foo() {} }).foo);
+testFunctionMirror((async function(){}).bind({}), "Object");
+
+%RunMicrotasks();