Implement addStream for HttpClientRequest/HttpResponse and propegate all write-errors from the sock…

tests/standalone/io/http_server_response_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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "dart:io";
@@ skipping 27 matching lines @@
 void testResponseDone() {
   testServerRequest((server, request) {
     request.response.close();
     request.response.done.then((response) {
       Expect.equals(request.response, response);
       server.close();
     });
   });
 }
 
+void testResponseAddStream() {

[Søren Gjesse, 2013/02/27 15:07:43]

Please add a test where you add more than one stream.

Please add a test where you add an empty stream.

Maybe we should check that the client actually received the concattenated
streams.

[Anders Johnsen, 2013/02/28 11:39:02]

Done.

+  testServerRequest((server, request) {
+    request.response.addStream(new File(new Options().script).openRead())
+      .then((response) {
+        response.close();
+        response.done.then((_) => server.close());
+      });
+  });
+}
+
 void testBadResponseAdd() {
   testServerRequest((server, request) {
     request.response.contentLength = 0;
     request.response.add([0]);
     request.response.done.catchError((error) {
       server.close();
     }, test: (e) => e is HttpException);
   });
 
   testServerRequest((server, request) {
@@ skipping 30 matching lines @@
     request.response.add([0]);
     request.response.close();
     request.response.done.catchError((error) {
       server.close();
     }, test: (e) => e is HttpException);
   });
 }
 
 void main() {
   testResponseDone();
+  testResponseAddStream();
   testBadResponseAdd();
   testBadResponseClose();
 }