Add Transient FileSystem which goes away after its snapsot file is gone

webkit/fileapi/transient_file_util_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/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "base/platform_file.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/blob/scoped_file.h"
+#include "webkit/fileapi/file_system_context.h"
+#include "webkit/fileapi/file_system_operation_context.h"
+#include "webkit/fileapi/isolated_context.h"
+#include "webkit/fileapi/mock_file_system_context.h"
+#include "webkit/fileapi/transient_file_util.h"
+
+namespace fileapi {
+
+class TransientFileUtilTest : public testing::Test {
+ public:
+  TransientFileUtilTest() {}
+  virtual ~TransientFileUtilTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    file_system_context_ = CreateFileSystemContextForTesting(
+        NULL, base::FilePath("dummy"));
+    transient_file_util_.reset(new TransientFileUtil);
+
+    ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
+  }
+
+  virtual void TearDown() OVERRIDE {
+    file_system_context_ = NULL;
+    MessageLoop::current()->RunUntilIdle();
+  }
+
+  void CreateAndRegisterTemporaryFile(
+      FileSystemURL* file_url,
+      base::FilePath* file_path) {
+    EXPECT_TRUE(
+        file_util::CreateTemporaryFileInDir(data_dir_.path(), file_path));
+    IsolatedContext* isolated_context = IsolatedContext::GetInstance();
+    std::string name = "tmp";
+    std::string fsid = isolated_context->RegisterFileSystemForPath(
+        kFileSystemTypeForTransientFile,
+        *file_path,
+        &name);
+    ASSERT_TRUE(!fsid.empty());
+    base::FilePath virtual_path = isolated_context->CreateVirtualRootPath(
+        fsid).AppendASCII(name);
+    *file_url = file_system_context_->CreateCrackedFileSystemURL(
+        GURL("http://foo"),
+        kFileSystemTypeIsolated,
+        virtual_path);
+  }
+
+  scoped_ptr<FileSystemOperationContext> NewOperationContext() {
+    return make_scoped_ptr(
+        new FileSystemOperationContext(file_system_context_));
+  }
+
+  FileSystemFileUtil* file_util() { return transient_file_util_.get(); }
+
+ private:
+  MessageLoop message_loop_;
+  base::ScopedTempDir data_dir_;
+  scoped_refptr<FileSystemContext> file_system_context_;
+  scoped_ptr<TransientFileUtil> transient_file_util_;
+
+  DISALLOW_COPY_AND_ASSIGN(TransientFileUtilTest);
+};
+
+TEST_F(TransientFileUtilTest, TransientFile) {
+  FileSystemURL temp_url;
+  base::FilePath temp_path;
+
+  CreateAndRegisterTemporaryFile(&temp_url, &temp_path);
+
+  base::PlatformFileError error;
+  base::PlatformFileInfo file_info;
+  base::FilePath path;
+
+  // Make sure the file is there.
+  ASSERT_TRUE(temp_url.is_valid());
+  ASSERT_TRUE(file_util::PathExists(temp_path));
+  ASSERT_FALSE(file_util::DirectoryExists(temp_path));
+
+  // Create a snapshot file.
+  {
+    webkit_blob::ScopedFile scoped_file =
+        file_util()->CreateSnapshotFile(NewOperationContext().get(),
+                                        temp_url,
+                                        &error,
+                                        &file_info,
+                                        &path);
+    ASSERT_EQ(base::PLATFORM_FILE_OK, error);
+    ASSERT_EQ(temp_path, path);
+    ASSERT_FALSE(file_info.is_directory);
+
+    // The file should be still there.
+    ASSERT_TRUE(file_util::PathExists(temp_path));
+    ASSERT_EQ(base::PLATFORM_FILE_OK,
+              file_util()->GetFileInfo(NewOperationContext().get(),
+                                       temp_url, &file_info, &path));
+    ASSERT_EQ(temp_path, path);
+    ASSERT_FALSE(file_info.is_directory);
+  }
+
+  // The file's now scoped out.
+  MessageLoop::current()->RunUntilIdle();
+
+  // Now the temporary file and the transient filesystem must be gone too.
+  ASSERT_FALSE(file_util::PathExists(temp_path));
+  ASSERT_EQ(base::PLATFORM_FILE_ERROR_NOT_FOUND,
+            file_util()->GetFileInfo(NewOperationContext().get(),
+                                     temp_url, &file_info, &path));
+}
+
+}  // namespace fileapi