remoting/host/native_messaging/native_messaging_writer_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "remoting/host/native_messaging/native_messaging_writer.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/json/json_reader.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/platform_file.h"
  11 #include "base/stl_util.h"
  12 #include "base/values.h"
  13 #include "remoting/host/setup/test_util.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 namespace remoting {
  17
  18 class NativeMessagingWriterTest : public testing::Test {
  19  public:
  20   NativeMessagingWriterTest();
  21   virtual ~NativeMessagingWriterTest();
  22
  23   virtual void SetUp() OVERRIDE;
  24   virtual void TearDown() OVERRIDE;
  25
  26  protected:
  27   scoped_ptr<NativeMessagingWriter> writer_;
  28   base::PlatformFile read_handle_;
  29   base::PlatformFile write_handle_;
  30   bool read_handle_open_;
  31 };
  32
  33 NativeMessagingWriterTest::NativeMessagingWriterTest() {}
  34
  35 NativeMessagingWriterTest::~NativeMessagingWriterTest() {}
  36
  37 void NativeMessagingWriterTest::SetUp() {
  38   ASSERT_TRUE(MakePipe(&read_handle_, &write_handle_));
  39   writer_.reset(new NativeMessagingWriter(write_handle_));
  40   read_handle_open_ = true;
  41 }
  42
  43 void NativeMessagingWriterTest::TearDown() {
  44   // |write_handle_| is owned by NativeMessagingWriter's FileStream, so don't
  45   // try to close it here. And close |read_handle_| only if it hasn't
  46   // already been closed.
  47   if (read_handle_open_)
  48     base::ClosePlatformFile(read_handle_);
  49 }
  50
  51 TEST_F(NativeMessagingWriterTest, GoodMessage) {
  52   base::DictionaryValue message;
  53   message.SetInteger("foo", 42);
  54   EXPECT_TRUE(writer_->WriteMessage(message));
  55
  56   // Read from the pipe and verify the content.
  57   uint32 length;
  58   int read = base::ReadPlatformFileAtCurrentPos(
  59       read_handle_, reinterpret_cast<char*>(&length), 4);
  60   EXPECT_EQ(4, read);
  61   std::string content(length, '\0');
  62   read = base::ReadPlatformFileAtCurrentPos(read_handle_,
  63                                             string_as_array(&content), length);
  64   EXPECT_EQ(static_cast<int>(length), read);
  65
  66   // |content| should now contain serialized |message|.
  67   scoped_ptr<base::Value> written_message(base::JSONReader::Read(content));
  68   EXPECT_TRUE(message.Equals(written_message.get()));
  69
  70   // Nothing more should have been written. Close the write-end of the pipe,
  71   // and verify the read end immediately hits EOF.
  72   writer_.reset(NULL);
  73   char unused;
  74   read = base::ReadPlatformFileAtCurrentPos(read_handle_, &unused, 1);
  75   EXPECT_LE(read, 0);
  76 }
  77
  78 TEST_F(NativeMessagingWriterTest, SecondMessage) {
  79   base::DictionaryValue message1;
  80   base::DictionaryValue message2;
  81   message2.SetInteger("foo", 42);
  82   EXPECT_TRUE(writer_->WriteMessage(message1));
  83   EXPECT_TRUE(writer_->WriteMessage(message2));
  84   writer_.reset(NULL);
  85
  86   // Read two messages.
  87   uint32 length;
  88   int read;
  89   std::string content;
  90   for (int i = 0; i < 2; i++) {
  91     read = base::ReadPlatformFileAtCurrentPos(
  92         read_handle_, reinterpret_cast<char*>(&length), 4);
  93     EXPECT_EQ(4, read) << "i = " << i;
  94     content.resize(length);
  95     read = base::ReadPlatformFileAtCurrentPos(read_handle_,
  96                                               string_as_array(&content),
  97                                               length);
  98     EXPECT_EQ(static_cast<int>(length), read) << "i = " << i;
  99   }
 100
 101   // |content| should now contain serialized |message2|.
 102   scoped_ptr<base::Value> written_message2(base::JSONReader::Read(content));
 103   EXPECT_TRUE(message2.Equals(written_message2.get()));
 104 }
 105
 106 TEST_F(NativeMessagingWriterTest, FailedWrite) {
 107   // Close the read end so that writing fails immediately.
 108   base::ClosePlatformFile(read_handle_);
 109   read_handle_open_ = false;
 110
 111   base::DictionaryValue message;
 112   EXPECT_FALSE(writer_->WriteMessage(message));
 113 }
 114
 115 }  // namespace remoting