copy wangle back into folly

[folly.git] / folly / wangle / channel / test / OutputBufferingHandlerTest.cpp

diff --git a/folly/wangle/channel/test/OutputBufferingHandlerTest.cpp b/folly/wangle/channel/test/OutputBufferingHandlerTest.cpp
new file mode 100644 (file)
index 0000000..0fce791
--- /dev/null
+++ b/folly/wangle/channel/test/OutputBufferingHandlerTest.cpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2015 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <folly/wangle/channel/StaticPipeline.h>
+#include <folly/wangle/channel/OutputBufferingHandler.h>
+#include <folly/wangle/channel/test/MockHandler.h>
+#include <folly/io/async/AsyncSocket.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+using namespace folly;
+using namespace folly::wangle;
+using namespace testing;
+
+typedef StrictMock<MockHandlerAdapter<
+  IOBufQueue&,
+  std::unique_ptr<IOBuf>>>
+MockBytesHandler;
+
+MATCHER_P(IOBufContains, str, "") { return arg->moveToFbString() == str; }
+
+TEST(OutputBufferingHandlerTest, Basic) {
+  MockBytesHandler mockHandler;
+  EXPECT_CALL(mockHandler, attachPipeline(_));
+  StaticPipeline<IOBufQueue&, std::unique_ptr<IOBuf>,
+    MockBytesHandler,
+    OutputBufferingHandler>
+  pipeline(&mockHandler, OutputBufferingHandler{});
+
+  EventBase eb;
+  auto socket = AsyncSocket::newSocket(&eb);
+  pipeline.setTransport(socket);
+
+  // Buffering should prevent writes until the EB loops, and the writes should
+  // be batched into one write call.
+  auto f1 = pipeline.write(IOBuf::copyBuffer("hello"));
+  auto f2 = pipeline.write(IOBuf::copyBuffer("world"));
+  EXPECT_FALSE(f1.isReady());
+  EXPECT_FALSE(f2.isReady());
+  EXPECT_CALL(mockHandler, write_(_, IOBufContains("helloworld")));
+  eb.loopOnce();
+  EXPECT_TRUE(f1.isReady());
+  EXPECT_TRUE(f2.isReady());
+  EXPECT_CALL(mockHandler, detachPipeline(_));
+
+ // Make sure the SharedPromise resets correctly
+  auto f = pipeline.write(IOBuf::copyBuffer("foo"));
+  EXPECT_FALSE(f.isReady());
+  EXPECT_CALL(mockHandler, write_(_, IOBufContains("foo")));
+  eb.loopOnce();
+  EXPECT_TRUE(f.isReady());
+}