chrome/browser/chromeos/drive/file_write_watcher_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 "chrome/browser/chromeos/drive/file_write_watcher.h"
   6
   7 #include <set>
   8
   9 #include "base/bind.h"
  10 #include "base/files/file_util.h"
  11 #include "base/files/scoped_temp_dir.h"
  12 #include "base/run_loop.h"
  13 #include "content/public/test/test_browser_thread_bundle.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 namespace drive {
  17 namespace internal {
  18
  19 namespace {
  20
  21 class TestObserver {
  22  public:
  23   // After all the resource_ids in |expected_upload| are notified for the
  24   // need of uploading, runs |quit_closure|. Also checks that each id is
  25   // notified only once.
  26   TestObserver(const std::set<std::string>& expected_upload,
  27                const base::Closure& quit_closure)
  28       : expected_upload_(expected_upload),
  29         quit_closure_(quit_closure) {
  30   }
  31
  32   void OnWrite(const std::string& id) {
  33     EXPECT_EQ(1U, expected_upload_.count(id)) << id;
  34     expected_upload_.erase(id);
  35     if (expected_upload_.empty())
  36       quit_closure_.Run();
  37   }
  38
  39  private:
  40   std::set<std::string> expected_upload_;
  41   base::Closure quit_closure_;
  42 };
  43
  44 // Writes something on the file at |path|.
  45 void WriteSomethingAfterStartWatch(const base::FilePath& path,
  46                                    bool watch_success) {
  47   EXPECT_TRUE(watch_success) << path.value();
  48
  49   const char kDummy[] = "hello";
  50   ASSERT_TRUE(base::WriteFile(path, kDummy, arraysize(kDummy)));
  51 }
  52
  53 class FileWriteWatcherTest : public testing::Test {
  54  protected:
  55   // The test requires UI thread (FileWriteWatcher DCHECKs that its public
  56   // interface is running on UI thread) and FILE thread (Linux version of
  57   // base::FilePathWatcher needs to live on an IOAllowed thread with TYPE_IO,
  58   // which is FILE thread in the production environment).
  59   //
  60   // By using the IO_MAINLOOP test thread bundle, the main thread is used
  61   // both as UI and FILE thread, with TYPE_IO message loop.
  62   FileWriteWatcherTest()
  63       : thread_bundle_(content::TestBrowserThreadBundle::IO_MAINLOOP) {
  64   }
  65
  66   void SetUp() override { ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); }
  67
  68   base::FilePath GetTempPath(const std::string& name) {
  69     return temp_dir_.path().Append(name);
  70   }
  71
  72  private:
  73   content::TestBrowserThreadBundle thread_bundle_;
  74   base::ScopedTempDir temp_dir_;
  75 };
  76
  77 }  // namespace
  78
  79 TEST_F(FileWriteWatcherTest, WatchThreeFiles) {
  80   std::set<std::string> expected;
  81   expected.insert("1");
  82   expected.insert("2");
  83   expected.insert("3");
  84
  85   base::RunLoop loop;
  86   TestObserver observer(expected, loop.QuitClosure());
  87
  88   // Set up the watcher.
  89   FileWriteWatcher watcher;
  90   watcher.DisableDelayForTesting();
  91
  92   // Start watching and running.
  93   base::FilePath path1 = GetTempPath("foo.txt");
  94   base::FilePath path2 = GetTempPath("bar.png");
  95   base::FilePath path3 = GetTempPath("buz.doc");
  96   base::FilePath path4 = GetTempPath("mya.mp3");
  97   watcher.StartWatch(
  98       path1,
  99       base::Bind(&WriteSomethingAfterStartWatch, path1),
 100       base::Bind(&TestObserver::OnWrite, base::Unretained(&observer), "1"));
 101   watcher.StartWatch(
 102       path2,
 103       base::Bind(&WriteSomethingAfterStartWatch, path2),
 104       base::Bind(&TestObserver::OnWrite, base::Unretained(&observer), "2"));
 105   watcher.StartWatch(
 106       path3,
 107       base::Bind(&WriteSomethingAfterStartWatch, path3),
 108       base::Bind(&TestObserver::OnWrite, base::Unretained(&observer), "3"));
 109
 110   // Unwatched write. It shouldn't be notified.
 111   WriteSomethingAfterStartWatch(path4, true);
 112
 113   // The loop should quit if all the three paths are notified to be written.
 114   loop.Run();
 115 }
 116
 117 }  // namespace internal
 118 }  // namespace drive