pkg/csslib: use pkg/test and allow latest version of logging pkg

test/selector_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 selector_test;
 
-import 'package:unittest/unittest.dart';
+import 'package:csslib/parser.dart';
+import 'package:test/test.dart';
+
 import 'testing.dart';
-import 'package:csslib/parser.dart';
 
 void testSelectorSuccesses() {
   var errors = [];
   var selectorAst = selector('#div .foo', errors: errors);
   expect(errors.isEmpty, true, reason: errors.toString());
   expect('#div .foo', compactOuptut(selectorAst));
 
   // Valid selectors for class names.
   selectorAst = selector('.foo', errors: errors..clear());
   expect(errors.isEmpty, true, reason: errors.toString());
@@ skipping 38 matching lines @@
       'error on line 1, column 9: name must start with a alpha character, but '
       'found a number\n'
       '.foobar .1a-story .xyzzy\n'
       '        ^^');
 }
 
 main() {
   test('Valid Selectors', testSelectorSuccesses);
   test('Invalid Selectors', testSelectorFailures);
 }