Media Gallery: Move MediaDeviceNotificationsLinux from content to chrome.

content/browser/media_device_notifications_linux_unittest.cc

Index: content/browser/media_device_notifications_linux_unittest.cc
===================================================================
--- content/browser/media_device_notifications_linux_unittest.cc	(revision 131949)
+++ content/browser/media_device_notifications_linux_unittest.cc	(working copy)
@@ -1,396 +0,0 @@
-// Copyright (c) 2012 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.
-
-// MediaDeviceNotificationsLinux unit tests.
-
-#include "content/browser/media_device_notifications_linux.h"
-
-#include <mntent.h>
-#include <stdio.h>
-
-#include <string>
-
-#include "base/file_util.h"
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
-#include "base/scoped_temp_dir.h"
-#include "base/system_monitor/system_monitor.h"
-#include "base/test/mock_devices_changed_observer.h"
-#include "content/browser/browser_thread_impl.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace content {
-
-namespace {
-
-using testing::_;
-
-const char kValidFS[] = "vfat";
-const char kInvalidFS[] = "invalidfs";
-
-const char kInvalidPath[] = "invalid path does not exist";
-
-const char kDevice1[] = "d1";
-const char kDevice2[] = "d2";
-const char kDevice3[] = "d3";
-
-const char kMountPointA[] = "mnt_a";
-const char kMountPointB[] = "mnt_b";
-
-// TODO(thestig) Move this into base/string_util.h, or replace this with
-// strndup_with_new() if we find more uses for it.
-// Duplicate the content of |str| into a new char array. Caller takes ownership
-// of the allocated array. Unlike std::string::c_str(), this returns a char*
-// instead of a const char*.
-char* copy_string(const std::string& str) {
-  const size_t len = str.length();
-  char* ret = new char[len + 1];
-  str.copy(ret, len, 0);
-  ret[len] = '\0';
-  return ret;
-}
-
-class MediaDeviceNotificationsLinuxTestWrapper
-    : public MediaDeviceNotificationsLinux {
- public:
-  MediaDeviceNotificationsLinuxTestWrapper(const FilePath& path,
-                                           MessageLoop* message_loop)
-      : MediaDeviceNotificationsLinux(path),
-        message_loop_(message_loop) {
-  }
-
- private:
-  // Avoids code deleting the object while there are references to it.
-  // Aside from the base::RefCountedThreadSafe friend class, any attempts to
-  // call this dtor will result in a compile-time error.
-  ~MediaDeviceNotificationsLinuxTestWrapper() {}
-
-  virtual void OnFilePathChanged(const FilePath& path) {
-    MediaDeviceNotificationsLinux::OnFilePathChanged(path);
-    message_loop_->PostTask(FROM_HERE, MessageLoop::QuitClosure());
-  }
-
-  MessageLoop* message_loop_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotificationsLinuxTestWrapper);
-};
-
-class MediaDeviceNotificationsLinuxTest : public testing::Test {
- public:
-  struct MtabTestData {
-    MtabTestData(const std::string& mount_device,
-                 const std::string& mount_point,
-                 const std::string& mount_type)
-        : mount_device(mount_device),
-          mount_point(mount_point),
-          mount_type(mount_type) {
-    }
-
-    const std::string mount_device;
-    const std::string mount_point;
-    const std::string mount_type;
-  };
-
-  MediaDeviceNotificationsLinuxTest()
-      : message_loop_(MessageLoop::TYPE_IO),
-        file_thread_(BrowserThread::FILE, &message_loop_) {
-  }
-  virtual ~MediaDeviceNotificationsLinuxTest() {}
-
- protected:
-  virtual void SetUp() {
-    mock_devices_changed_observer_.reset(new base::MockDevicesChangedObserver);
-    system_monitor_.AddDevicesChangedObserver(
-        mock_devices_changed_observer_.get());
-
-    // Create and set up a temp dir with files for the test.
-    ASSERT_TRUE(scoped_temp_dir_.CreateUniqueTempDir());
-    FilePath test_dir = scoped_temp_dir_.path().AppendASCII("test_etc");
-    ASSERT_TRUE(file_util::CreateDirectory(test_dir));
-    mtab_file_ = test_dir.AppendASCII("test_mtab");
-    MtabTestData initial_test_data[] = {
-      MtabTestData("dummydevice", "dummydir", kInvalidFS),
-    };
-    WriteToMtab(initial_test_data,
-                arraysize(initial_test_data),
-                true  /* overwrite */);
-
-    // Initialize the test subject.
-    notifications_ =
-        new MediaDeviceNotificationsLinuxTestWrapper(mtab_file_,
-                                                     &message_loop_);
-    notifications_->Init();
-    message_loop_.RunAllPending();
-  }
-
-  virtual void TearDown() {
-    message_loop_.RunAllPending();
-    notifications_ = NULL;
-    system_monitor_.RemoveDevicesChangedObserver(
-        mock_devices_changed_observer_.get());
-  }
-
-  // Append mtab entries from the |data| array of size |data_size| to the mtab
-  // file, and run the message loop.
-  void AppendToMtabAndRunLoop(const MtabTestData* data, size_t data_size) {
-    WriteToMtab(data, data_size, false  /* do not overwrite */);
-    message_loop_.Run();
-  }
-
-  // Overwrite the mtab file with mtab entries from the |data| array of size
-  // |data_size|, and run the message loop.
-  void OverwriteMtabAndRunLoop(const MtabTestData* data, size_t data_size) {
-    WriteToMtab(data, data_size, true  /* overwrite */);
-    message_loop_.Run();
-  }
-
-  // Simplied version of OverwriteMtabAndRunLoop() that just deletes all the
-  // entries in the mtab file.
-  void WriteEmptyMtabAndRunLoop() {
-    OverwriteMtabAndRunLoop(NULL,  // No data.
-                            0);    // No data length.
-  }
-
-  // Create a directory named |dir| relative to the test directory.
-  // It has a DCIM directory, so MediaDeviceNotificationsLinux recognizes it as
-  // a media directory.
-  FilePath CreateMountPointWithDCIMDir(const std::string& dir) {
-    return CreateMountPoint(dir, true  /* create DCIM dir */);
-  }
-
-  // Create a directory named |dir| relative to the test directory.
-  // It does not have a DCIM directory, so MediaDeviceNotificationsLinux does
-  // not recognizes it as a media directory.
-  FilePath CreateMountPointWithoutDCIMDir(const std::string& dir) {
-    return CreateMountPoint(dir, false  /* do not create DCIM dir */);
-  }
-
-  base::MockDevicesChangedObserver& observer() {
-    return *mock_devices_changed_observer_;
-  }
-
- private:
-  // Create a directory named |dir| relative to the test directory.
-  // Set |with_dcim_dir| to true if the created directory will have a "DCIM"
-  // subdirectory.
-  // Returns the full path to the created directory on success, or an empty
-  // path on failure.
-  FilePath CreateMountPoint(const std::string& dir, bool with_dcim_dir) {
-    FilePath return_path(scoped_temp_dir_.path());
-    return_path = return_path.AppendASCII(dir);
-    FilePath path(return_path);
-    if (with_dcim_dir)
-      path = path.AppendASCII("DCIM");
-    if (!file_util::CreateDirectory(path))
-      return FilePath();
-    return return_path;
-  }
-
-  // Write the test mtab data to |mtab_file_|.
-  // |data| is an array of mtab entries.
-  // |data_size| is the array size of |data|.
-  // |overwrite| specifies whether to overwrite |mtab_file_|.
-  void WriteToMtab(const MtabTestData* data,
-                   size_t data_size,
-                   bool overwrite) {
-    FILE* file = setmntent(mtab_file_.value().c_str(), overwrite ? "w" : "a");
-    ASSERT_TRUE(file);
-
-    mntent entry;
-    scoped_array<char> mount_opts(copy_string("rw"));
-    entry.mnt_opts = mount_opts.get();
-    entry.mnt_freq = 0;
-    entry.mnt_passno = 0;
-    for (size_t i = 0; i < data_size; ++i) {
-      scoped_array<char> mount_device(copy_string(data[i].mount_device));
-      scoped_array<char> mount_point(copy_string(data[i].mount_point));
-      scoped_array<char> mount_type(copy_string(data[i].mount_type));
-      entry.mnt_fsname = mount_device.get();
-      entry.mnt_dir = mount_point.get();
-      entry.mnt_type = mount_type.get();
-      ASSERT_EQ(0, addmntent(file, &entry));
-    }
-    ASSERT_EQ(1, endmntent(file));
-  }
-
-  // The message loop and file thread to run tests on.
-  MessageLoop message_loop_;
-  BrowserThreadImpl file_thread_;
-
-  // SystemMonitor and DevicesChangedObserver to hook together to test.
-  base::SystemMonitor system_monitor_;
-  scoped_ptr<base::MockDevicesChangedObserver> mock_devices_changed_observer_;
-
-  // Temporary directory for created test data.
-  ScopedTempDir scoped_temp_dir_;
-  // Path to the test mtab file.
-  FilePath mtab_file_;
-
-  scoped_refptr<MediaDeviceNotificationsLinuxTestWrapper> notifications_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotificationsLinuxTest);
-};
-
-// Simple test case where we attach and detach a media device.
-TEST_F(MediaDeviceNotificationsLinuxTest, BasicAttachDetach) {
-  testing::Sequence mock_sequence;
-  FilePath test_path = CreateMountPointWithDCIMDir(kMountPointA);
-  ASSERT_FALSE(test_path.empty());
-  MtabTestData test_data[] = {
-    MtabTestData(kDevice1, kInvalidPath, kValidFS),
-    MtabTestData(kDevice2, test_path.value(), kValidFS),
-  };
-  // Only |kDevice2| should be attached, since |kDevice1| has a bad path.
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(0, kDevice2, test_path))
-      .InSequence(mock_sequence);
-  AppendToMtabAndRunLoop(test_data, arraysize(test_data));
-
-  // |kDevice2| should be detached here.
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(0)).InSequence(mock_sequence);
-  WriteEmptyMtabAndRunLoop();
-}
-
-// Only mount points with DCIM directories are recognized.
-TEST_F(MediaDeviceNotificationsLinuxTest, DCIM) {
-  testing::Sequence mock_sequence;
-  FilePath test_path_a = CreateMountPointWithDCIMDir(kMountPointA);
-  ASSERT_FALSE(test_path_a.empty());
-  MtabTestData test_data1[] = {
-    MtabTestData(kDevice1, test_path_a.value(), kValidFS),
-  };
-  // |kDevice1| should be attached as expected.
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(0, kDevice1, test_path_a))
-      .InSequence(mock_sequence);
-  AppendToMtabAndRunLoop(test_data1, arraysize(test_data1));
-
-  // This should do nothing, since |kMountPointB| does not have a DCIM dir.
-  FilePath test_path_b = CreateMountPointWithoutDCIMDir(kMountPointB);
-  ASSERT_FALSE(test_path_b.empty());
-  MtabTestData test_data2[] = {
-    MtabTestData(kDevice2, test_path_b.value(), kValidFS),
-  };
-  AppendToMtabAndRunLoop(test_data2, arraysize(test_data2));
-
-  // |kDevice1| should be detached as expected.
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(0)).InSequence(mock_sequence);
-  WriteEmptyMtabAndRunLoop();
-}
-
-// More complicated test case with multiple devices on multiple mount points.
-TEST_F(MediaDeviceNotificationsLinuxTest, MultiDevicesMultiMountPoints) {
-  FilePath test_path_a = CreateMountPointWithDCIMDir(kMountPointA);
-  FilePath test_path_b = CreateMountPointWithDCIMDir(kMountPointB);
-  ASSERT_FALSE(test_path_a.empty());
-  ASSERT_FALSE(test_path_b.empty());
-
-  // Attach two devices.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  MtabTestData test_data1[] = {
-    MtabTestData(kDevice1, test_path_a.value(), kValidFS),
-    MtabTestData(kDevice2, test_path_b.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(2);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(0);
-  AppendToMtabAndRunLoop(test_data1, arraysize(test_data1));
-
-  // Attach |kDevice1| to |kMountPointB|.
-  // |kDevice2| is inaccessible, so it is detached. |kDevice1| has been
-  // re-attached at |kMountPointB|, so it is 'detached' from kMountPointA.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  // kDevice1 -> kMountPointB
-  MtabTestData test_data2[] = {
-    MtabTestData(kDevice1, test_path_b.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(1);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(2);
-  AppendToMtabAndRunLoop(test_data2, arraysize(test_data2));
-
-  // Attach |kDevice2| to |kMountPointA|.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  // kDevice1 -> kMountPointB
-  // kDevice2 -> kMountPointA
-  MtabTestData test_data3[] = {
-    MtabTestData(kDevice2, test_path_a.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(1);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(0);
-  AppendToMtabAndRunLoop(test_data3, arraysize(test_data3));
-
-  // Detach |kDevice2| from |kMountPointA|.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  // kDevice1 -> kMountPointB
-  MtabTestData test_data4[] = {
-    MtabTestData(kDevice1, test_path_a.value(), kValidFS),
-    MtabTestData(kDevice2, test_path_b.value(), kValidFS),
-    MtabTestData(kDevice1, test_path_b.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(0);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(1);
-  OverwriteMtabAndRunLoop(test_data4, arraysize(test_data4));
-
-  // Detach |kDevice1| from |kMountPointB|.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(2);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(1);
-  OverwriteMtabAndRunLoop(test_data1, arraysize(test_data1));
-
-  // Detach all devices.
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(0);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(2);
-  WriteEmptyMtabAndRunLoop();
-}
-
-// More complicated test case with multiple devices on one mount point.
-TEST_F(MediaDeviceNotificationsLinuxTest, MultiDevicesOneMountPoint) {
-  testing::Sequence mock_sequence;
-  FilePath test_path_a = CreateMountPointWithDCIMDir(kMountPointA);
-  FilePath test_path_b = CreateMountPointWithDCIMDir(kMountPointB);
-  ASSERT_FALSE(test_path_a.empty());
-  ASSERT_FALSE(test_path_b.empty());
-
-  // |kDevice1| is most recently mounted at |kMountPointB|.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  // kDevice1 -> kMountPointB
-  MtabTestData test_data1[] = {
-    MtabTestData(kDevice1, test_path_a.value(), kValidFS),
-    MtabTestData(kDevice2, test_path_b.value(), kValidFS),
-    MtabTestData(kDevice1, test_path_b.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(0, kDevice1, test_path_b))
-      .Times(1);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(_)).Times(0);
-  OverwriteMtabAndRunLoop(test_data1, arraysize(test_data1));
-
-  // Attach |kDevice3| to |kMountPointB|.
-  // |kDevice1| is inaccessible at its most recent mount point, so it is
-  // detached and unavailable, even though it is still accessible via
-  // |kMountPointA|.
-  // kDevice1 -> kMountPointA
-  // kDevice2 -> kMountPointB
-  // kDevice1 -> kMountPointB
-  // kDevice3 -> kMountPointB
-  MtabTestData test_data2[] = {
-    MtabTestData(kDevice3, test_path_b.value(), kValidFS),
-  };
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(0)).Times(1);
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(1, kDevice3, test_path_b))
-      .Times(1);
-  AppendToMtabAndRunLoop(test_data2, arraysize(test_data2));
-
-  // Detach all devices.
-  EXPECT_CALL(observer(), OnMediaDeviceAttached(_, _, _)).Times(0);
-  EXPECT_CALL(observer(), OnMediaDeviceDetached(1)).Times(1);
-  WriteEmptyMtabAndRunLoop();
-}
-
-}  // namespace
-
-}  // namespace content