unittests for Chromoting native messaging host.

remoting/host/setup/native_messaging_writer_unittest.cc

+// Copyright 2013 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.
+
+#include "base/basictypes.h"
+#include "base/file_util.h"
+#include "base/json/json_reader.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/platform_file.h"
+#include "base/values.h"
+#include "remoting/host/setup/native_messaging_writer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if defined(OS_POSIX)
+#include <unistd.h>
+#endif  // defined(OS_POSIX)
+
+namespace remoting {
+
+class NativeMessagingWriterTest : public testing::Test {
+ public:
+  NativeMessagingWriterTest();
+  virtual ~NativeMessagingWriterTest();
+
+  virtual void SetUp() OVERRIDE;
+  virtual void TearDown() OVERRIDE;
+
+  NativeMessagingWriter* writer() const { return writer_.get(); }
+  base::FilePath temp_file_path() const { return temp_file_path_; }
+  base::PlatformFile temp_file_handle() const { return temp_file_handle_; }
+
+ private:
+  scoped_ptr<NativeMessagingWriter> writer_;
+  base::FilePath temp_file_path_;
+  base::PlatformFile temp_file_handle_;
+};
+
+NativeMessagingWriterTest::NativeMessagingWriterTest() {}
+
+NativeMessagingWriterTest::~NativeMessagingWriterTest() {}
+
+void NativeMessagingWriterTest::SetUp() {
+  file_util::CreateTemporaryFile(&temp_file_path_);
+  temp_file_handle_ = base::CreatePlatformFile(
+      temp_file_path_, base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_WRITE,
+      NULL, NULL);
+  writer_.reset(new NativeMessagingWriter(temp_file_handle_));
+}
+
+void NativeMessagingWriterTest::TearDown() {
+  EXPECT_TRUE(file_util::Delete(temp_file_path_, false));
+}
+
+TEST_F(NativeMessagingWriterTest, GoodMessage) {
+  base::DictionaryValue message;
+  message.SetInteger("foo", 42);
+  EXPECT_TRUE(writer()->WriteMessage(message));
+  base::ClosePlatformFile(temp_file_handle());
+
+  // Read the file and verify the content.
+  std::string content;
+  EXPECT_TRUE(file_util::ReadFileToString(temp_file_path(), &content));
+  EXPECT_GT(content.length(), 4U);
+  uint32 length = *reinterpret_cast<const uint32*>(content.data());
+  content.erase(0, 4);
+  EXPECT_EQ(content.length(), length);
+
+  // |content| should now contain serialized |message|.
+  scoped_ptr<base::Value> written_message(base::JSONReader::Read(content));
+  EXPECT_TRUE(message.Equals(written_message.get()));
+}
+
+TEST_F(NativeMessagingWriterTest, SecondMessage) {
+  base::DictionaryValue message1;
+  base::DictionaryValue message2;
+  message2.SetInteger("foo", 42);
+  EXPECT_TRUE(writer()->WriteMessage(message1));
+  EXPECT_TRUE(writer()->WriteMessage(message2));
+  base::ClosePlatformFile(temp_file_handle());
+
+  // Read the file and verify the content.
+  std::string content;
+  EXPECT_TRUE(file_util::ReadFileToString(temp_file_path(), &content));
+  EXPECT_GT(content.length(), 4U);
+  uint32 length = *reinterpret_cast<const uint32*>(content.data());
+  content.erase(0, 4);  // Remove header1
+  EXPECT_GT(content.length(), length);
+  content.erase(0, length);  // Remove body1
+  EXPECT_GT(content.length(), 4U);
+  length = *reinterpret_cast<const uint32*>(content.data());
+  content.erase(0, 4);  // Remove header2
+  EXPECT_EQ(content.length(), length);
+
+  // |content| should now contain serialized |message2|.
+  scoped_ptr<base::Value> written_message2(base::JSONReader::Read(content));
+  EXPECT_TRUE(message2.Equals(written_message2.get()));
+}
+
+// TODO(lambroslambrou): Implement this test on OS_WIN as well.
+#if defined(OS_POSIX)
+
+TEST_F(NativeMessagingWriterTest, FailedWrite) {
+  base::ClosePlatformFile(temp_file_handle());
+
+  int fds[2];
+  EXPECT_EQ(0, pipe(fds));
+
+  // Pass the write end to NativeMessagingWriter, and close the read end so
+  // that writing fails.
+  base::ClosePlatformFile(fds[0]);
+
+  NativeMessagingWriter writer(fds[1]);
+  base::DictionaryValue message;
+  EXPECT_FALSE(writer.WriteMessage(message));
+}
+
+#endif  // defined(OS_POSIX)
+
+}  // namespace remoting