VM: Make ObjectMirror.invoke support getters returning functions.

tests/lib/mirrors/invoke_call_through_getter_test.dart

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library test.invoke_call_through_getter;
+
+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+
+class FakeFunctionCall {
+  call(x, y) => '1 $x $y';
+}
+class FakeFunctionNSM {
+  noSuchMethod(msg) => msg.positionalArguments.join(', ');
+}
+
+class C {
+  get fakeFunctionCall => new FakeFunctionCall();
+  get fakeFunctionNSM => new FakeFunctionNSM();
+  get closure => (x, y) => '2 $this $x $y';
+  get closureOpt => (x, y, [z, w]) => '3 $this $x $y $z $w';
+  get closureNamed => (x, y, {z, w}) => '4 $this $x $y $z $w';
+  get notAClosure => 'Not a closure';
+  noSuchMethod(msg) => 'DNU';
+
+  toString() => 'C';
+}
+
+testInstanceBase() {
+  var c = new C();
+
+  Expect.equals('1 5 6', c.fakeFunctionCall(5, 6));
+  Expect.equals('7, 8', c.fakeFunctionNSM(7, 8));
+  Expect.equals('2 C 9 10', c.closure(9, 10));
+  Expect.equals('3 C 11 12 13 null', c.closureOpt(11, 12, 13));
+  Expect.equals('4 C 14 15 null 16', c.closureNamed(14, 15, w: 16));
+  Expect.equals('DNU', c.doesNotExist(17, 18));
+  Expect.throws(() => c.closure('wrong arity'), (e) => e is NoSuchMethodError);
+  Expect.throws(() => c.notAClosure(), (e) => e is NoSuchMethodError);
+}
+
+testInstanceReflective() {
+  InstanceMirror im = reflect(new C());
+
+  Expect.equals('1 5 6',
+                im.invoke(#fakeFunctionCall, [5, 6]).reflectee);
+  Expect.equals('7, 8',
+                im.invoke(#fakeFunctionNSM, [7, 8]).reflectee);
+  Expect.equals('2 C 9 10',
+                im.invoke(#closure, [9, 10]).reflectee);
+  Expect.equals('3 C 11 12 13 null',
+                im.invoke(#closureOpt, [11, 12, 13]).reflectee);
+  Expect.equals('4 C 14 15 null 16',
+                im.invoke(#closureNamed, [14, 15], {#w: 16}).reflectee);
+  Expect.equals('DNU',
+                im.invoke(#doesNotExist, [17, 18]).reflectee);
+  Expect.throws(() => im.invoke(#closure, ['wrong arity']),
+                (e) => e is NoSuchMethodError);
+  Expect.throws(() => im.invoke(#notAClosure, []),
+                (e) => e is NoSuchMethodError);
+}
+
+class D {
+  static get fakeFunctionCall => new FakeFunctionCall();
+  static get fakeFunctionNSM => new FakeFunctionNSM();
+  static get closure => (x, y) => '2 $x $y';
+  static get closureOpt => (x, y, [z, w]) => '3 $x $y $z $w';
+  static get closureNamed => (x, y, {z, w}) => '4 $x $y $z $w';
+  static get notAClosure => 'Not a closure';
+}
+
+testClassBase() {
+  Expect.equals('1 5 6', D.fakeFunctionCall(5, 6));
+  Expect.equals('7, 8', D.fakeFunctionNSM(7, 8));
+  Expect.equals('2 9 10', D.closure(9, 10));
+  Expect.equals('3 11 12 13 null', D.closureOpt(11, 12, 13));
+  Expect.equals('4 14 15 null 16', D.closureNamed(14, 15, w: 16));
+  Expect.throws(() => D.closure('wrong arity'), (e) => e is NoSuchMethodError);
+}
+
+testClassReflective() {
+  ClassMirror cm = reflectClass(D);
+
+  Expect.equals('1 5 6',
+                cm.invoke(#fakeFunctionCall, [5, 6]).reflectee);
+  Expect.equals('7, 8',
+                cm.invoke(#fakeFunctionNSM, [7, 8]).reflectee);
+  Expect.equals('2 9 10',
+                cm.invoke(#closure, [9, 10]).reflectee);
+  Expect.equals('3 11 12 13 null',
+                cm.invoke(#closureOpt, [11, 12, 13]).reflectee);
+  Expect.equals('4 14 15 null 16',
+                cm.invoke(#closureNamed, [14, 15], {#w: 16}).reflectee);
+  Expect.throws(() => cm.invoke(#closure, ['wrong arity']),
+                (e) => e is NoSuchMethodError);
+}
+
+get fakeFunctionCall => new FakeFunctionCall();
+get fakeFunctionNSM => new FakeFunctionNSM();
+get closure => (x, y) => '2 $x $y';
+get closureOpt => (x, y, [z, w]) => '3 $x $y $z $w';
+get closureNamed => (x, y, {z, w}) => '4 $x $y $z $w';
+get notAClosure => 'Not a closure';
+
+testLibraryBase() {
+  Expect.equals('1 5 6', fakeFunctionCall(5, 6));
+  Expect.equals('7, 8', fakeFunctionNSM(7, 8));
+  Expect.equals('2 9 10', closure(9, 10));
+  Expect.equals('3 11 12 13 null', closureOpt(11, 12, 13));
+  Expect.equals('4 14 15 null 16', closureNamed(14, 15, w: 16));
+  Expect.throws(() => closure('wrong arity'), (e) => e is NoSuchMethodError);
+}
+
+testLibraryReflective() {
+  LibraryMirror lm = reflectClass(D).owner;
+
+  Expect.equals('1 5 6',
+                lm.invoke(#fakeFunctionCall, [5, 6]).reflectee);
+  Expect.equals('7, 8',
+                lm.invoke(#fakeFunctionNSM, [7, 8]).reflectee);
+  Expect.equals('2 9 10',
+                lm.invoke(#closure, [9, 10]).reflectee);
+  Expect.equals('3 11 12 13 null',
+                lm.invoke(#closureOpt, [11, 12, 13]).reflectee);
+  Expect.equals('4 14 15 null 16',
+                lm.invoke(#closureNamed, [14, 15], {#w: 16}).reflectee);
+  Expect.throws(() => lm.invoke(#closure, ['wrong arity']),
+                (e) => e is NoSuchMethodError);
+}
+
+main() {
+  testInstanceBase();
+  testInstanceReflective();
+  testClassBase();
+  testClassReflective();
+  testLibraryBase();
+  testLibraryReflective();
+}