pkg/metatest: fix for latest pkg/test

lib/metatest.dart

 // Copyright (c) 2014, 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.
 
 /// A test library for testing test libraries? We must go deeper.
 ///
 /// Since unit testing code tends to use a lot of global state, it can be tough
 /// to test. This library manages it by running each test case in a child
 /// isolate, then reporting the results back to the parent isolate.
 library metatest;
@@ skipping 54 matching lines @@
 /// Sets up a test with the given [description] and [body]. After the test runs,
 /// calls [validate] with the result map.
 void _setUpTest(String description, void body(),
     void validate(List<LiveTest> liveTests), {String testOn, Timeout timeout,
     skip, Map<String, dynamic> onPlatform}) {
   test(description, () async {
     var declarer = new Declarer();
     runZoned(body, zoneValues: {#test.declarer: declarer});
 
     var engine = new Engine.withSuites([
-      new RunnerSuite(new VMEnvironment(), declarer.tests)
+      new RunnerSuite(new VMEnvironment(), declarer.build())
     ]);
     for (var test in engine.liveTests) {
       test.onPrint.listen(print);
     }
     await engine.run();
 
     validate(engine.liveTests);
   }, testOn: testOn, timeout: timeout, skip: skip, onPlatform: onPlatform);
 }
 
 /// Returns a string description of the test run descibed by [liveTests].
 String _summarizeTests(List<LiveTest> liveTests) {
   var buffer = new StringBuffer();
   for (var liveTest in liveTests) {
     buffer.writeln("${liveTest.state.result}: ${liveTest.test.name}");
     for (var error in liveTest.errors) {
       buffer.writeln(error.error);
       if (error.stackTrace != null) buffer.writeln(error.stackTrace);
     }
   }
   return buffer.toString();
 }