Add a couple functions to package:stack_trace.

pkg/stack_trace/test/frame_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 frame_test;
 
 import 'package:pathos/path.dart' as path;
 import 'package:stack_trace/stack_trace.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 167 matching lines @@
       expect(() => new Frame.parseFirefox('.foo'), throwsFormatException);
       expect(() => new Frame.parseFirefox('.foo@dart:async/future.dart'),
           throwsFormatException);
       expect(() => new Frame.parseFirefox('.foo(@dart:async/future.dart:10'),
           throwsFormatException);
       expect(() => new Frame.parseFirefox('@dart:async/future.dart'),
           throwsFormatException);
     });
   });
 
+  group('.parseFriendly', () {
+    test('parses a simple stack frame correctly', () {
+      var frame = new Frame.parseFriendly(
+          "http://dartlang.org/foo/bar.dart 10:11  Foo.<fn>.bar");
+      expect(frame.uri, equals(Uri.parse("http://dartlang.org/foo/bar.dart")));
+      expect(frame.line, equals(10));
+      expect(frame.column, equals(11));
+      expect(frame.member, equals('Foo.<fn>.bar'));
+    });
+
+    test('parses a stack frame with no line or column correctly', () {
+      var frame = new Frame.parseFriendly(
+          "http://dartlang.org/foo/bar.dart  Foo.<fn>.bar");
+      expect(frame.uri, equals(Uri.parse("http://dartlang.org/foo/bar.dart")));
+      expect(frame.line, isNull);
+      expect(frame.column, isNull);
+      expect(frame.member, equals('Foo.<fn>.bar'));
+    });
+
+    test('parses a stack frame with a relative path correctly', () {
+      var frame = new Frame.parseFriendly("foo/bar.dart 10:11    Foo.<fn>.bar");
+      expect(frame.uri, equals(
+          path.toUri(path.absolute(path.join('foo', 'bar.dart')))));
+      expect(frame.line, equals(10));
+      expect(frame.column, equals(11));
+      expect(frame.member, equals('Foo.<fn>.bar'));
+    });
+
+    test('throws a FormatException for malformed frames', () {
+      expect(() => new Frame.parseFriendly(''), throwsFormatException);
+      expect(() => new Frame.parseFriendly('foo/bar.dart'),
+          throwsFormatException);
+      expect(() => new Frame.parseFriendly('foo/bar.dart 10:11'),
+          throwsFormatException);
+    });
+  });
+
   test('only considers dart URIs to be core', () {
     bool isCore(String library) =>
       new Frame.parseVM('#0 Foo ($library:0:0)').isCore;
 
     expect(isCore('dart:core'), isTrue);
     expect(isCore('dart:async'), isTrue);
     expect(isCore('dart:core/uri.dart'), isTrue);
     expect(isCore('dart:async/future.dart'), isTrue);
     expect(isCore('bart:core'), isFalse);
     expect(isCore('sdart:core'), isFalse);
@@ skipping 52 matching lines @@
           equals('http://dartlang.org/thing.dart 5:10 in Foo'));
     });
 
     test('converts "<anonymous closure>" to "<fn>"', () {
       expect(new Frame.parseVM('#0 Foo.<anonymous closure> '
               '(dart:core/uri.dart:5:10)').toString(),
           equals('dart:core/uri.dart 5:10 in Foo.<fn>'));
     });
   });
 }