Rename the package to "test".

lib/src/frontend/test_on.dart

Index: lib/src/frontend/test_on.dart
diff --git a/lib/src/frontend/test_on.dart b/lib/src/frontend/test_on.dart
index 9503ecb93ec8cf5fc08e7acd1c1bf9c2e86ec1c2..74d9749b136ba1f42dc26a8d9e8c37fddea8939f 100644
--- a/lib/src/frontend/test_on.dart
+++ b/lib/src/frontend/test_on.dart
@@ -2,13 +2,13 @@
 // 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 unittest.frontend.test_on;
+library test.frontend.test_on;
 
 /// An annotation indicating which platforms a test suite supports.
 ///
 /// For the full syntax of [expression], see [the README][].
 ///
-/// [the README]: https://github.com/dart-lang/unittest/#platform-selector-syntax
+/// [the README]: https://github.com/dart-lang/test/#platform-selector-syntax
 class TestOn {
   /// The expression specifying the platform.
   final String expression;