Add validation test cases for struct versioning.

mojo/dart/test/validation_test.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:isolate';
 import 'dart:mojo_bindings';
 import 'dart:mojo_builtin' as builtin;
 import 'dart:mojo_core';
@@ skipping 61 matching lines @@
   assert(r.isOk);
 
   completer.future.then((_) {
     assert(expected == "PASS");
     conformanceImpl.close();
     pipe.endpoints[0].handle.close();
     handles.forEach((h) => h.close());
   });
 }
 
+// TODO(zra, yzshen): Some struct versioning tests (with "mthd11" in their
+// names) are skipped.
 Iterable<String> getTestFiles(String path, String prefix) =>
     builtin.enumerateFiles(path)
-           .where((s) => s.startsWith(prefix) && s.endsWith(".data"))
+           .where((s) => s.startsWith(prefix) && s.endsWith(".data") &&
+                         !s.contains("mthd11"))
            .map((s) => s.replaceFirst('.data', ''));
 
 main(List args) {
   int handle = args[0];
   String path = args[1];
 
   // First test the parser.
   parser.parserTests();
 
   // Then run the conformance tests.
   getTestFiles(path, "$path/conformance_").forEach((test) {
     runTest(test, readAndParseTest(test), expectedResult(test));
   });
   // TODO(zra): Add integration tests when they no longer rely on Client=.
 }