Erik Ernst
3a7eeb6315
Change-Id: If3912d75c5f89a741299b2fae4299d01ac928eec Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170424 Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Michael Thomsen <mit@google.com> Reviewed-by: Mayank Patke <fishythefish@google.com> Commit-Queue: Erik Ernst <eernst@google.com>
87 lines
3.1 KiB
Dart
87 lines
3.1 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// VMOptions=--optimization-counter-threshold=5
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import "dart:mirrors";
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import "package:expect/expect.dart";
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void main() {
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for (int i = 0; i < 10; i++) {
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test();
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}
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}
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void test() {
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ClassMirror cm = reflectClass(Null);
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InstanceMirror im1 = reflect(null);
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Expect.equals(cm, im1.type);
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if (hasSoundNullSafety) {
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Expect.throwsTypeError(() => im1.invoke(const Symbol("=="), [null]),
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'null not assignable to Object');
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} else {
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Expect.isTrue(im1.invoke(const Symbol("=="), [null]).reflectee);
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}
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Expect.isFalse(im1.invoke(const Symbol("=="), [42]).reflectee);
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var obj = confuse(null); // Null value that isn't known at compile-time.
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InstanceMirror im2 = reflect(obj);
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Expect.equals(cm, im2.type);
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if (hasSoundNullSafety) {
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Expect.throwsTypeError(() => im2.invoke(const Symbol("=="), [null]),
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'null not assignable to Object');
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} else {
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Expect.isTrue(im2.invoke(const Symbol("=="), [null]).reflectee);
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}
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Expect.isFalse(im2.invoke(const Symbol("=="), [42]).reflectee);
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InstanceMirror nullMirror = reflect(null);
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Expect.isTrue(nullMirror.getField(#hashCode).reflectee is int);
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Expect.equals(null.hashCode, nullMirror.getField(#hashCode).reflectee);
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Expect.equals('Null', nullMirror.getField(#runtimeType).reflectee.toString());
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if (hasSoundNullSafety) {
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Expect.throwsTypeError(
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() => nullMirror.invoke(#==, [null]), 'null not assignable to Object');
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} else {
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Expect.isTrue(nullMirror.invoke(#==, [null]).reflectee);
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}
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Expect.isFalse(nullMirror.invoke(#==, [new Object()]).reflectee);
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Expect.equals('null', nullMirror.invoke(#toString, []).reflectee);
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Expect.throwsNoSuchMethodError(
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() => nullMirror.invoke(#notDefined, []), 'noSuchMethod');
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ClassMirror NullMirror = nullMirror.type;
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Expect.equals(reflectClass(Null), NullMirror);
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Expect.equals(#Null, NullMirror.simpleName);
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Expect.equals(#Object, NullMirror.superclass!.simpleName);
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Expect.equals(null, NullMirror.superclass!.superclass);
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Expect.listEquals([], NullMirror.superinterfaces);
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Map<Uri, LibraryMirror> libraries = currentMirrorSystem().libraries;
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LibraryMirror? coreLibrary = libraries[Uri.parse('dart:core')];
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if (coreLibrary == null) {
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// In minified mode we don't preserve the URIs.
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coreLibrary = libraries.values
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.firstWhere((LibraryMirror lm) => lm.simpleName == #dart.core);
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Uri uri = coreLibrary.uri;
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Expect.equals("https", uri.scheme);
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Expect.equals("dartlang.org", uri.host);
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Expect.equals("/dart2js-stripped-uri", uri.path);
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}
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Expect.equals(coreLibrary, NullMirror.owner);
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}
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// Magic incantation to avoid the compiler recognizing the constant values
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// at compile time. If the result is computed at compile time, the dynamic code
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// will not be tested.
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confuse(x) {
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try {
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if (new DateTime.now().millisecondsSinceEpoch == 42) x = 42;
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throw [x];
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} on List catch (e) {
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return e[0];
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}
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return 42;
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}
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