Mirrors overhaul.

dart/tests/lib/mirrors/private_symbol_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;
 
 import 'dart:mirrors';
 import 'package:expect/expect.dart';
 
 typedef int _F(int);
 
 class _C<_T> {
   get g {}
   set s(x) {}
   m(_p) {}
   get _g {}
   set _s(x) {}
   _m() {}
 }
 
 main() {
   // Test private symbols are distinct across libraries, and the same within a
   // library when created multiple ways. Test the string can be properly
   // extracted.
-  LibraryMirror libcore = currentMirrorSystem().findLibrary(#dart.core).single;
-  LibraryMirror libmath = currentMirrorSystem().findLibrary(#dart.math).single;
-  LibraryMirror libtest = currentMirrorSystem().findLibrary(#test).single;
+  LibraryMirror libcore = currentMirrorSystem().findLibrary(#dart.core);
+  LibraryMirror libmath = currentMirrorSystem().findLibrary(#dart.math);
+  LibraryMirror libtest = currentMirrorSystem().findLibrary(#test);
 
   Symbol corefoo = MirrorSystem.getSymbol('foo', libcore);
   Symbol mathfoo = MirrorSystem.getSymbol('foo', libmath);
   Symbol testfoo = MirrorSystem.getSymbol('foo', libtest);
 
   Expect.equals(corefoo, mathfoo);
   Expect.equals(mathfoo, testfoo);
   Expect.equals(testfoo, corefoo);
 
   Expect.equals('foo', MirrorSystem.getName(corefoo));
@@ skipping 80 matching lines @@
   Expect.throws(() => MirrorSystem.getSymbol('_private'),
                 (e) => e is ArgumentError);
 
   var notALibraryMirror = 7;
   Expect.throws(() => MirrorSystem.getSymbol('_private', notALibraryMirror),
                 (e) => e is ArgumentError || e is TypeError);
 
   Expect.throws(() => MirrorSystem.getSymbol('public', notALibraryMirror),
                 (e) => e is ArgumentError || e is TypeError);
 }