dart:io | Fix handling of exceptions from onBadCertificate callback.

tests/standalone/io/secure_bad_certificate_test.dart

+// Copyright (c) 2013, 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.
+
+// This test verifies that the bad certificate callback works.
+
+import "package:expect/expect.dart";
+import "package:path/path.dart";
+import "dart:async";
+import "dart:io";
+
+const HOST_NAME = "localhost";
+const CERTIFICATE = "localhost_cert";
+
+
+String certificateDatabase() =>
+    join(dirname(new Options().script), 'pkcert');
+
+Future<SecureServerSocket> runServer() {
+  SecureSocket.initialize(database: certificateDatabase(),
+                          password: 'dartdart');
+
+  return SecureServerSocket.bind(HOST_NAME, 0, CERTIFICATE)
+      .then((SecureServerSocket server) {
+    server.listen((SecureSocket socket) {
+      socket.listen((_) { },
+                    onDone: () {
+                      socket.close();
+                    });
+    }, onError: (e) => Expect.isTrue(e is HandshakeException));
+    return server;
+  });
+}
+
+
+void main() {
+  final options = new Options();
+  var clientScript = join(dirname(options.script),
+                          'secure_bad_certificate_client.dart');
+
+  Future clientProcess(int port, String acceptCertificate) {
+    return Process.run(options.executable,
+        [clientScript, port.toString(), acceptCertificate])
+        .then((ProcessResult result) {
+      if (result.exitCode != 0) {
+        print("Client failed, stdout:");
+        print(result.stdout);
+        print("  stderr:");
+        print(result.stderr);
+        Expect.fail('Client subprocess exit code: ${result.exitCode}');
+      }
+    });
+  }
+
+  runServer().then((server) {
+    Future.wait([clientProcess(server.port, 'true'),
+                 clientProcess(server.port, 'false'),
+                 clientProcess(server.port, 'fisk'),
+                 clientProcess(server.port, 'exception')]).then((_) {
+      server.close();
+    });
+  });
+}