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// 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;
}