Recommit "Fix issues with Socket shutdown.""

tests/standalone/io/issue_22636_test.dart

+// Copyright (c) 2015, 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 checks that setting writeEventsEnabled on a socket that is
+// closed for read (the other end has closed for write) does not send
+// an additional READ_CLOSED event.
+
+import "dart:io";
+import "dart:async";
+import "package:expect/expect.dart";
+
+final Duration delay = new Duration(milliseconds: 100);
+final List data = new List.generate(100, (i) => i % 20 + 65);
+RawServerSocket server;
+RawSocket client;
+bool serverReadClosedReceived = false;
+bool serverFirstWrite = true;
+
+void serverListen(RawSocket serverSide) {
+  void serveData(RawSocketEvent event) {
+    switch (event) {
+      case RawSocketEvent.WRITE:
+        serverSide.write(data);
+        if (serverFirstWrite) {
+          serverFirstWrite = false;
+          new Future.delayed(delay, () {
+            serverSide.writeEventsEnabled = true;
+          });
+        } else {
+          new Future.delayed(delay, () {
+            Expect.isTrue(serverReadClosedReceived);
+            serverSide.shutdown(SocketDirection.SEND);
+            server.close();
+          });
+        }
+        break;
+      case RawSocketEvent.READ_CLOSED:
+        Expect.isFalse(serverReadClosedReceived);
+        serverReadClosedReceived = true;
+        break;
+    }
+  }
+  serverSide.listen(serveData);
+}
+
+
+test() async {
+  server = await RawServerSocket.bind(InternetAddress.LOOPBACK_IP_V4, 0);
+  server.listen(serverListen);
+  client = await RawSocket.connect(InternetAddress.LOOPBACK_IP_V4, server.port);
+  client.shutdown(SocketDirection.SEND);
+  client.listen((RawSocketEvent event) {
+    if (event == RawSocketEvent.READ) {
+      client.read();
+    }
+  });
+}
+
+
+void main() {
+  test();
+}