Implement reflecting on mixin applications.

dart/tests/lib/mirrors/mixin_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.mixin_test;
+
+@MirrorsUsed(targets: 'test.mixin_test, test.model, Object', override: '*')

[ahe, 2013/08/09 12:17:49]

I have discovered this test doesn't work without a MirrorsUsed annotation, and I
need to find out why.

+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+
+import 'model.dart';
+import 'stringify.dart';
+
+class Mixin {
+  int i;
+  m() {}
+}
+
+class Mixin2 {
+  int i2;
+  m2() {}
+}
+
+typedef MixinApplication = C with Mixin;
+typedef MixinApplicationA = C with Mixin, Mixin2;
+
+typedef UnusedMixinApplication = C with Mixin;
+
+class Subclass extends C with Mixin {
+  f() {}
+}
+
+class Subclass2 extends MixinApplication {
+  g() {}
+}
+
+class SubclassA extends C with Mixin, Mixin2 {
+  fa() {}
+}
+
+class Subclass2A extends MixinApplicationA {
+  ga() {}
+}
+
+checkClass(Type type, List<String> expectedSuperclasses) {
+  int i = 0;
+  for (var cls = reflectClass(type); cls != null; cls = cls.superclass) {
+    expect(expectedSuperclasses[i++], cls);
+  }
+  Expect.equals(i, expectedSuperclasses.length, '$type');
+}
+
+expectSame(ClassMirror a, ClassMirror b) {
+  Expect.equals(a, b);
+  expect(stringify(a), b);
+  expect(stringify(b), a);
+}
+
+testMixin() {
+  checkClass(Mixin, [
+      'Class(s(Mixin) in s(test.mixin_test), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+  expect(
+      '{Mixin: Method(s(Mixin) in s(Mixin), constructor),'

[ahe, 2013/08/09 12:17:49]

This is wrong, members should not include constructors.

+      ' i: Variable(s(i) in s(Mixin)),'
+      ' m: Method(s(m) in s(Mixin))}',
+      reflectClass(Mixin).members);
+}
+
+testMixin2() {
+  checkClass(Mixin2, [
+      'Class(s(Mixin2) in s(test.mixin_test), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+  expect(
+      '{Mixin2: Method(s(Mixin2) in s(Mixin2), constructor),'
+      ' i2: Variable(s(i2) in s(Mixin2)),'
+      ' m2: Method(s(m2) in s(Mixin2))}',
+      reflectClass(Mixin2).members);
+}
+
+testMixinApplication() {
+  checkClass(MixinApplication, [
+      'Class(s(MixinApplication) in s(test.mixin_test), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{MixinApplication: Method(s(MixinApplication) in s(MixinApplication),'
+      ' constructor),'
+      ' i: Variable(s(i) in s(MixinApplication)),'
+      ' m: Method(s(m) in s(MixinApplication))}',
+      reflectClass(MixinApplication).members);
+
+  expectSame(reflectClass(C), reflectClass(MixinApplication).superclass);
+}
+
+testMixinApplicationA() {
+  checkClass(MixinApplicationA, [
+      'Class(s(MixinApplicationA) in s(test.mixin_test), top-level)',
+      'Class(s(test.mixin_test.Mixin(test.model.C)), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{MixinApplicationA: Method(s(MixinApplicationA) in s(MixinApplicationA),'
+      ' constructor),'
+      ' i2: Variable(s(i2) in s(MixinApplicationA)),'
+      ' m2: Method(s(m2) in s(MixinApplicationA))}',
+      reflectClass(MixinApplicationA).members);
+
+  expect(
+       // TODO(ahe): The owner should probably be the mixin application.

[ahe, 2013/08/09 12:17:49]

Actually, the mixin is the owner of members, but not the constructor (which is
explicitly copied down per the specification).

+      '{Mixin: Method(s(Mixin) in s(Mixin), constructor),'
+      ' i: Variable(s(i) in s(Mixin)),'
+      ' m: Method(s(m) in s(Mixin))}',
+      reflectClass(MixinApplicationA).superclass.members);
+
+  expectSame(
+      reflectClass(C),
+      reflectClass(MixinApplicationA).superclass.superclass);
+}
+
+testUnusedMixinApplication() {
+  checkClass(UnusedMixinApplication, [
+      'Class(s(UnusedMixinApplication) in s(test.mixin_test), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{UnusedMixinApplication: Method(s(UnusedMixinApplication)'
+      ' in s(UnusedMixinApplication), constructor),'
+      ' i: Variable(s(i) in s(UnusedMixinApplication)),'
+      ' m: Method(s(m) in s(UnusedMixinApplication))}',
+      reflectClass(UnusedMixinApplication).members);
+
+  expectSame(reflectClass(C), reflectClass(UnusedMixinApplication).superclass);
+}
+
+testSubclass() {
+  checkClass(Subclass, [
+      'Class(s(Subclass) in s(test.mixin_test), top-level)',
+      'Class(s(test.mixin_test.Mixin(test.model.C)), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{Subclass: Method(s(Subclass) in s(Subclass), constructor),'
+      ' f: Method(s(f) in s(Subclass))}',
+      reflectClass(Subclass).members);
+
+  expect(
+       // TODO(ahe): The owner should probably be the mixin application.
+      '{Mixin: Method(s(Mixin) in s(Mixin), constructor),'
+      ' i: Variable(s(i) in s(Mixin)),'
+      ' m: Method(s(m) in s(Mixin))}',
+      reflectClass(Subclass).superclass.members);
+
+  expectSame(
+      reflectClass(C),
+      reflectClass(Subclass).superclass.superclass);
+}
+
+testSubclass2() {
+  checkClass(Subclass2, [
+      'Class(s(Subclass2) in s(test.mixin_test), top-level)',
+      'Class(s(MixinApplication) in s(test.mixin_test), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{Subclass2: Method(s(Subclass2) in s(Subclass2), constructor),'
+      ' g: Method(s(g) in s(Subclass2))}',
+      reflectClass(Subclass2).members);
+
+  expectSame(
+      reflectClass(MixinApplication),
+      reflectClass(Subclass2).superclass);
+}
+
+testSubclassA() {
+  checkClass(SubclassA, [
+      'Class(s(SubclassA) in s(test.mixin_test), top-level)',
+      'Class(s(test.mixin_test.Mixin2(test.mixin_test.Mixin(test.model.C))),'
+      ' top-level)',
+      'Class(s(test.mixin_test.Mixin(test.model.C)), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{SubclassA: Method(s(SubclassA) in s(SubclassA), constructor),'
+      ' fa: Method(s(fa) in s(SubclassA))}',
+      reflectClass(SubclassA).members);
+
+  expect(
+       // TODO(ahe): The owner should probably be the mixin application.
+      '{Mixin2: Method(s(Mixin2) in s(Mixin2), constructor),'
+      ' i2: Variable(s(i2) in s(Mixin2)),'
+      ' m2: Method(s(m2) in s(Mixin2))}',
+      reflectClass(SubclassA).superclass.members);
+
+  expect(
+       // TODO(ahe): The owner should probably be the mixin application.
+      '{Mixin: Method(s(Mixin) in s(Mixin), constructor),'
+      ' i: Variable(s(i) in s(Mixin)),'
+      ' m: Method(s(m) in s(Mixin))}',
+      reflectClass(SubclassA).superclass.superclass.members);
+
+  expectSame(
+      reflectClass(C),
+      reflectClass(SubclassA).superclass.superclass.superclass);
+}
+
+testSubclass2A() {
+  checkClass(Subclass2A, [
+      'Class(s(Subclass2A) in s(test.mixin_test), top-level)',
+      'Class(s(MixinApplicationA) in s(test.mixin_test), top-level)',
+      'Class(s(test.mixin_test.Mixin(test.model.C)), top-level)',
+      'Class(s(C) in s(test.model), top-level)',
+      'Class(s(B) in s(test.model), top-level)',
+      'Class(s(A) in s(test.model), top-level)',
+      'Class(s(Object) in s(dart.core), top-level)',
+  ]);
+
+  expect(
+      '{Subclass2A: Method(s(Subclass2A) in s(Subclass2A), constructor),'
+      ' ga: Method(s(ga) in s(Subclass2A))}',
+      reflectClass(Subclass2A).members);
+
+  expectSame(reflectClass(MixinApplicationA),
+             reflectClass(Subclass2A).superclass);
+}
+
+main() {
+  testMixin();
+  testMixin2();
+  testMixinApplication();
+  testMixinApplicationA();
+  testUnusedMixinApplication();
+  testSubclass();
+  testSubclass2();
+  testSubclassA();
+  testSubclass2A();
+}