| // 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. |
| |
| // @dart = 2.9 |
| |
| // VMOptions=--optimization-counter-threshold=5 |
| |
| import "dart:mirrors"; |
| import "package:expect/expect.dart"; |
| |
| void main() { |
| for (int i = 0; i < 10; i++) { |
| test(); |
| } |
| } |
| |
| void test() { |
| ClassMirror cm = reflectClass(Null); |
| |
| InstanceMirror im1 = reflect(null); |
| Expect.equals(cm, im1.type); |
| Expect.isTrue(im1.invoke(const Symbol("=="), [null]).reflectee); |
| Expect.isFalse(im1.invoke(const Symbol("=="), [42]).reflectee); |
| |
| var obj = confuse(null); // Null value that isn't known at compile-time. |
| InstanceMirror im2 = reflect(obj); |
| Expect.equals(cm, im2.type); |
| Expect.isTrue(im2.invoke(const Symbol("=="), [null]).reflectee); |
| Expect.isFalse(im2.invoke(const Symbol("=="), [42]).reflectee); |
| |
| InstanceMirror nullMirror = reflect(null); |
| Expect.isTrue(nullMirror.getField(#hashCode).reflectee is int); |
| Expect.equals(null.hashCode, nullMirror.getField(#hashCode).reflectee); |
| Expect.equals('Null', nullMirror.getField(#runtimeType).reflectee.toString()); |
| Expect.isTrue(nullMirror.invoke(#==, [null]).reflectee); |
| Expect.isFalse(nullMirror.invoke(#==, [new Object()]).reflectee); |
| Expect.equals('null', nullMirror.invoke(#toString, []).reflectee); |
| Expect.throwsNoSuchMethodError( |
| () => nullMirror.invoke(#notDefined, []), 'noSuchMethod'); |
| |
| ClassMirror NullMirror = nullMirror.type; |
| Expect.equals(reflectClass(Null), NullMirror); |
| Expect.equals(#Null, NullMirror.simpleName); |
| Expect.equals(#Object, NullMirror.superclass.simpleName); |
| Expect.equals(null, NullMirror.superclass.superclass); |
| Expect.listEquals([], NullMirror.superinterfaces); |
| Map<Uri, LibraryMirror> libraries = currentMirrorSystem().libraries; |
| LibraryMirror coreLibrary = libraries[Uri.parse('dart:core')]; |
| if (coreLibrary == null) { |
| // In minified mode we don't preserve the URIs. |
| coreLibrary = libraries.values |
| .firstWhere((LibraryMirror lm) => lm.simpleName == #dart.core); |
| Uri uri = coreLibrary.uri; |
| Expect.equals("https", uri.scheme); |
| Expect.equals("dartlang.org", uri.host); |
| Expect.equals("/dart2js-stripped-uri", uri.path); |
| } |
| Expect.equals(coreLibrary, NullMirror.owner); |
| } |
| |
| // Magic incantation to avoid the compiler recognizing the constant values |
| // at compile time. If the result is computed at compile time, the dynamic code |
| // will not be tested. |
| confuse(x) { |
| try { |
| if (new DateTime.now().millisecondsSinceEpoch == 42) x = 42; |
| throw [x]; |
| } catch (e) { |
| return e[0]; |
| } |
| return 42; |
| } |