tests: import unittest via package: url

tests/html/canvasrenderingcontext2d_test.dart

 // Copyright (c) 2012, 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 canvas_rendering_context_2d_test; import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_individual_config.dart';
+library canvas_rendering_context_2d_test; import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 import 'dart:math';
 
 // Some rounding errors in the browsers.
 checkPixel(List<int> pixel, List<int> expected) {
   expect(pixel[0], closeTo(expected[0], 2));
   expect(pixel[1], closeTo(expected[1], 2));
   expect(pixel[2], closeTo(expected[2], 2));
   expect(pixel[3], closeTo(expected[3], 2));
 }
@@ skipping 721 matching lines @@
 
       // The box does not draw after 20 pixels.
       expectPixelUnfilled(x - 10, y);
       expectPixelUnfilled(x + maxWidth + 1, y);
       expectPixelUnfilled(x + maxWidth + 20, y);
       expectPixelFilled(x, y);
       expectPixelFilled(x + 10, y);
     });
   });
 }