Rename the package to "test".

test/backend/platform_selector/parser_test.dart

 // Copyright (c) 2015, 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.
 
-import 'package:unittest/unittest.dart';
-import 'package:unittest/src/backend/platform_selector/ast.dart';
-import 'package:unittest/src/backend/platform_selector/parser.dart';
+import 'package:test/test.dart';
+import 'package:test/src/backend/platform_selector/ast.dart';
+import 'package:test/src/backend/platform_selector/parser.dart';
 
 /// A matcher that asserts that a value is a [ConditionalNode].
 Matcher _isConditionalNode =
     new isInstanceOf<ConditionalNode>("ConditionalNode");
 
 /// A matcher that asserts that a value is an [OrNode].
 Matcher _isOrNode = new isInstanceOf<OrNode>("OrNode");
 
 /// A matcher that asserts that a value is an [AndNode].
 Matcher _isAndNode = new isInstanceOf<AndNode>("AndNode");
@@ skipping 240 matching lines @@
     (value) => value is VariableNode && value.name == name,
     'is a variable named "$name"');
 
 void _expectToString(String selector, [String result]) {
   if (result == null) result = selector;
   expect(_toString(selector), equals(result),
       reason: 'Expected toString of "$selector" to be "$result".');
 }
 
 String _toString(String selector) => new Parser(selector).parse().toString();