[test] add FunctionMirror and PromiseMirror tests for async functions

BUG=v8:4483
R=yangguo@chromium.org, littledan@chromium.org

Review-Url: https://codereview.chromium.org/2082023002
Cr-Commit-Position: refs/heads/master@{#37149}

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

+// 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 --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];
+}
+
+function testPromiseMirror(promise, status, value) {
+  // Create mirror and JSON representation.
+  var mirror = debug.MakeMirror(promise);
+  var serializer = debug.MakeMirrorSerializer();
+  var json = JSON.stringify(serializer.serializeValue(mirror));
+  var refs = new MirrorRefCache(
+      JSON.stringify(serializer.serializeReferencedObjects()));
+
+  // Check the mirror hierachy.
+  assertTrue(mirror instanceof debug.Mirror);
+  assertTrue(mirror instanceof debug.ValueMirror);
+  assertTrue(mirror instanceof debug.ObjectMirror);
+  assertTrue(mirror instanceof debug.PromiseMirror);
+
+  // Check the mirror properties.
+  assertEquals(status, mirror.status());
+  assertTrue(mirror.isPromise());
+  assertEquals('promise', mirror.type());
+  assertFalse(mirror.isPrimitive());
+  assertEquals("Object", mirror.className());
+  assertEquals("#<Promise>", mirror.toText());
+  assertSame(promise, mirror.value());
+  assertTrue(mirror.promiseValue() instanceof debug.Mirror);
+  assertEquals(value, mirror.promiseValue().value());
+
+  // Parse JSON representation and check.
+  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 = (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 = (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((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((async function() { throw 2; })());
+ip = m2.internalProperties();
+assertEquals("rejected", ip[0].value().value());
+assertEquals(2, ip[1].value().value());
+
+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();

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

+// 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 --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];
+}
+
+function testFunctionMirror(f) {
+  // Create mirror and JSON representation.
+  var mirror = debug.MakeMirror(f);
+  var serializer = debug.MakeMirrorSerializer();
+  var json = JSON.stringify(serializer.serializeValue(mirror));
+  var refs = new MirrorRefCache(
+      JSON.stringify(serializer.serializeReferencedObjects()));
+
+  // Check the mirror hierachy.
+  assertTrue(mirror instanceof debug.Mirror);
+  assertTrue(mirror instanceof debug.ValueMirror);
+  assertTrue(mirror instanceof debug.ObjectMirror);
+  assertTrue(mirror instanceof debug.FunctionMirror);
+
+  // Check the mirror properties.
+  assertTrue(mirror.isFunction());
+  assertEquals('function', mirror.type());
+  assertFalse(mirror.isPrimitive());
+  assertEquals("Function", mirror.className());
+  assertEquals(f.name, mirror.name());
+  assertTrue(mirror.resolved());
+  assertEquals(f.toString(), mirror.source());
+  assertTrue(mirror.constructorFunction() instanceof debug.ObjectMirror);
+  assertTrue(mirror.protoObject() instanceof debug.Mirror);
+  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('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(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();