Add type test for jsinterop types.

tests/compiler/dart2js/jsinterop/world_test.dart

+// Copyright (c) 2016, 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 jsinterop.world_test;
+
+import 'package:expect/expect.dart';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/common.dart';
+import 'package:compiler/src/elements/elements.dart'
+    show Element, ClassElement;
+import 'package:compiler/src/js_backend/js_backend.dart';
+import 'package:compiler/src/world.dart';
+import '../type_test_helper.dart';
+
+void main() {
+  asyncTest(() async {
+    await testClasses();
+  });
+}
+
+testClasses() async {
+  test(String mainSource,
+      {List<String> directlyInstantiated: const <String>[],
+       List<String> indirectlyInstantiated: const <String>[]}) async {
+    TypeEnvironment env = await TypeEnvironment.create(r"""
+@JS()
+class A {
+  get foo;
+
+  external A(var foo);
+}
+
+@JS()
+class B {
+  get foo;
+
+  external B(var foo);
+}
+
+@JS()
+@anonymous
+class C {
+  final foo;
+
+  external factory C({foo});
+}
+
+@JS()
+@anonymous
+class D {
+  final foo;
+
+  external factory D({foo});
+}
+
+class E {
+  final foo;
+
+  E(this.foo);
+}
+
+class F {
+  final foo;
+
+  F(this.foo);
+}
+
+newA() => new A(0);
+newB() => new B(1);
+newC() => new C(foo: 2);
+newD() => new D(foo: 3);
+newE() => new E(4);
+newF() => new F(5);
+""", mainSource: """
+import 'package:js/js.dart';
+
+$mainSource
+""", useMockCompiler: false);
+    Map<String, ClassElement> classEnvironment = <String, ClassElement>{};
+
+    ClassElement registerClass(ClassElement cls) {
+      classEnvironment[cls.name] = cls;
+      return cls;
+    }
+
+    ClassWorld world = env.compiler.world;
+    JavaScriptBackend backend = env.compiler.backend;
+    ClassElement Object_ = registerClass(env.compiler.coreClasses.objectClass);
+    ClassElement Interceptor =
+        registerClass(backend.helpers.jsInterceptorClass);
+    ClassElement JavaScriptObject =
+        registerClass(backend.helpers.jsJavaScriptObjectClass);
+    ClassElement A = registerClass(env.getElement('A'));
+    ClassElement B = registerClass(env.getElement('B'));
+    ClassElement C = registerClass(env.getElement('C'));
+    ClassElement D = registerClass(env.getElement('D'));
+    ClassElement E = registerClass(env.getElement('E'));
+    ClassElement F = registerClass(env.getElement('F'));
+
+    Expect.equals(Interceptor.superclass, Object_);
+    Expect.equals(JavaScriptObject.superclass, Interceptor);
+
+    Expect.equals(A.superclass, JavaScriptObject);
+    Expect.equals(B.superclass, JavaScriptObject);
+    Expect.equals(C.superclass, JavaScriptObject);
+    Expect.equals(D.superclass, JavaScriptObject);
+    Expect.equals(E.superclass, Object_);
+    Expect.equals(F.superclass, Object_);
+
+    for (String name in classEnvironment.keys) {
+      ClassElement cls = classEnvironment[name];
+      bool isInstantiated = false;
+      if (directlyInstantiated.contains(name)) {
+        isInstantiated = true;
+        Expect.isTrue(world.isDirectlyInstantiated(cls),
+            "Expected $name to be directly instantiated in `${mainSource}`:"
+                "\n${world.dump(cls)}");
+      }
+      if (indirectlyInstantiated.contains(name)) {
+        isInstantiated = true;
+        Expect.isTrue(world.isIndirectlyInstantiated(cls),
+            "Expected $name to be indirectly instantiated in `${mainSource}`:"
+                "\n${world.dump(cls)}");
+      }
+      if (!isInstantiated && (name != 'Object' && name != 'Interceptor')) {
+        Expect.isFalse(world.isInstantiated(cls),
+            "Expected $name to be uninstantiated in `${mainSource}`:"
+                "\n${world.dump(cls)}");
+      }
+    }
+  }
+
+  await test('main() {}');
+
+  await test('main() => newA();',
+      directlyInstantiated: ['A', 'B', 'C', 'D'],
+      indirectlyInstantiated: ['Object', 'Interceptor', 'JavaScriptObject']);
+
+  await test('main() => newB();',
+      directlyInstantiated: ['A', 'B', 'C', 'D'],
+      indirectlyInstantiated: ['Object', 'Interceptor', 'JavaScriptObject']);
+
+  await test('main() => newC();',
+      directlyInstantiated: ['A', 'B', 'C', 'D'],
+      indirectlyInstantiated: ['Object', 'Interceptor', 'JavaScriptObject']);
+
+  await test('main() => newD();',
+      directlyInstantiated: ['A', 'B', 'C', 'D'],
+      indirectlyInstantiated: ['Object', 'Interceptor', 'JavaScriptObject']);
+
+  await test('main() => newE();',
+      directlyInstantiated: ['E']);
+
+  await test('main() => newF();',
+      directlyInstantiated: ['F']);
+
+  await test('main() => [newD(), newE()];',
+      directlyInstantiated: ['A', 'B', 'C', 'D', 'E'],
+      indirectlyInstantiated: ['Object', 'Interceptor', 'JavaScriptObject']);
+}