Add a couple functions to package:stack_trace.

pkg/stack_trace/test/trace_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 trace_test;
 
 import 'package:pathos/path.dart' as path;
 import 'package:stack_trace/stack_trace.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 83 matching lines @@
           'Foo._bar@http://pub.dartlang.org/stuff.js:42');
 
       expect(trace.frames[0].uri,
           equals(Uri.parse("http://pub.dartlang.org/thing.js")));
       expect(trace.frames[1].uri,
           equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
       expect(trace.frames[2].uri,
           equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
     });
 
+    test('parses a package:stack_trace stack trace correctly', () {
+      var trace = new Trace.parse(
+          'http://dartlang.org/foo/bar.dart 10:11  Foo.<fn>.bar\n'
+          'http://dartlang.org/foo/baz.dart        Foo.<fn>.bar');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://dartlang.org/foo/bar.dart")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://dartlang.org/foo/baz.dart")));
+    });
+
+    test('parses a real package:stack_trace stack trace correctly', () {
+      var traceString = new Trace.current().toString();
+      expect(new Trace.parse(traceString).toString(), equals(traceString));
+    });
+
     test('parses an empty string correctly', () {
       var trace = new Trace.parse('');
       expect(trace.frames, isEmpty);
       expect(trace.toString(), equals(''));
     });
   });
 
   test('.toString() nicely formats the stack trace', () {
     var trace = new Trace.parse('''
 #0      Foo._bar (foo/bar.dart:42:21)
 #1      zip.<anonymous closure>.zap (dart:async/future.dart:0:2)
 #2      zip.<anonymous closure>.zap (http://pub.dartlang.org/thing.dart:1:100)
 ''');
 
     expect(trace.toString(), equals('''
 foo/bar.dart 42:21                        Foo._bar
 dart:async/future.dart 0:2                zip.<fn>.zap
 http://pub.dartlang.org/thing.dart 1:100  zip.<fn>.zap
 '''));
   });
 
-  test('.stackTrace forwards to .toString()', () {
-    var trace = new Trace.current();
-    expect(trace.stackTrace, equals(trace.toString()));
-  });
+  test('.vmTrace returns a native-style trace', () {
+    var uri = path.toUri(path.absolute('foo'));
+    var trace = new Trace([
+      new Frame(uri, 10, 20, 'Foo.<fn>'),
+      new Frame(Uri.parse('http://dartlang.org/foo.dart'), null, null, 'bar'),
+      new Frame(Uri.parse('dart:async'), 15, null, 'baz'),
+    ]);
 
-  test('.fullStackTrace forwards to .toString()', () {
-    var trace = new Trace.current();
-    expect(trace.fullStackTrace, equals(trace.toString()));
+    expect(trace.vmTrace.toString(), equals(
+        '#1      Foo.<anonymous closure> ($uri:10:20)\n'
+        '#2      bar (http://dartlang.org/foo.dart:0:0)\n'
+        '#3      baz (dart:async:15:0)\n'));
   });
 
   test('.terse folds core frames together bottom-up', () {
     var trace = new Trace.parse('''
 #0 notCore (foo.dart:42:21)
 #1 top (dart:async/future.dart:0:2)
 #2 bottom (dart:core/uri.dart:1:100)
 #3 alsoNotCore (bar.dart:10:20)
 #4 top (dart:io:5:10)
 #5 bottom (dart:async-patch/future.dart:9:11)
@@ skipping 19 matching lines @@
 
     var folded = trace.foldFrames((frame) => frame.member.startsWith('foo'));
     expect(folded.toString(), equals('''
 foo.dart 42:21                     notFoo
 foo.dart 1:100                     fooBottom
 bar.dart 10:20                     alsoNotFoo
 dart:async-patch/future.dart 9:11  fooBottom
 '''));
   });
 }