Wired GDataFileSystem::GetFile() method with internal cache.

chrome/browser/chromeos/gdata/gdata_documents_service_browsertest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/json/json_reader.h"
 #include "chrome/browser/chromeos/gdata/gdata_documents_service.h"
+#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "net/test/test_server.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 class GDataTest : public InProcessBrowserTest {
  public:
   GDataTest()
       : InProcessBrowserTest(),
         gdata_test_server_(net::TestServer::TYPE_GDATA,
                            net::TestServer::kLocalhost,
                            FilePath(FILE_PATH_LITERAL("chrome/test/data"))) {
   }
 
   virtual void SetUpOnMainThread() OVERRIDE {
     ASSERT_TRUE(gdata_test_server_.Start());
     service_.reset(new gdata::DocumentsService);
     service_->Initialize(browser()->profile());
     service_->gdata_auth_service()->set_oauth2_auth_token_for_testing(
         net::TestServer::kGDataAuthToken);
   }
 
  protected:
+  FilePath GetTestCachedFilePath(const FilePath& file_name) {
+    return browser()->profile()->GetPath().Append(file_name);
+  }
+
   net::TestServer gdata_test_server_;
   scoped_ptr<gdata::DocumentsService> service_;
 };
 
 // The test callback for DocumentsService::DownloadFile().
 void TestDownloadCallback(gdata::GDataErrorCode* result,
                           std::string* contents,
                           gdata::GDataErrorCode error,
                           const GURL& content_url,
                           const FilePath& temp_file) {
@@ skipping 13 matching lines @@
   MessageLoop::current()->Quit();
 }
 
 }  // namespace
 
 IN_PROC_BROWSER_TEST_F(GDataTest, Download) {
   gdata::GDataErrorCode result = gdata::GDATA_OTHER_ERROR;
   std::string contents;
   service_->DownloadFile(
       FilePath("/dummy/gdata/testfile.txt"),
+      GetTestCachedFilePath(FilePath("cached_testfile.txt")),
       gdata_test_server_.GetURL("files/chromeos/gdata/testfile.txt"),
       base::Bind(&TestDownloadCallback, &result, &contents));
   ui_test_utils::RunMessageLoop();
 
   EXPECT_EQ(gdata::HTTP_SUCCESS, result);
   FilePath expected_filepath = gdata_test_server_.document_root().Append(
       FilePath(FILE_PATH_LITERAL("chromeos/gdata/testfile.txt")));
   std::string expected_contents;
   file_util::ReadFileToString(expected_filepath, &expected_contents);
   EXPECT_EQ(expected_contents, contents);
 }
 
 IN_PROC_BROWSER_TEST_F(GDataTest, NonExistingDownload) {
   gdata::GDataErrorCode result = gdata::GDATA_OTHER_ERROR;
   std::string dummy_contents;
   service_->DownloadFile(
       FilePath("/dummy/gdata/no-such-file.txt"),
+      GetTestCachedFilePath(FilePath("cache_no-such-file.txt")),
       gdata_test_server_.GetURL("files/chromeos/gdata/no-such-file.txt"),
       base::Bind(&TestDownloadCallback, &result, &dummy_contents));
   ui_test_utils::RunMessageLoop();
 
   EXPECT_EQ(gdata::HTTP_NOT_FOUND, result);
   // Do not verify the not found message.
 }
 
 IN_PROC_BROWSER_TEST_F(GDataTest, GetDocuments) {
   gdata::GDataErrorCode result = gdata::GDATA_OTHER_ERROR;
@@ skipping 21 matching lines @@
   gdata::GDataErrorCode result = gdata::GDATA_OTHER_ERROR;
   base::Value* result_data = NULL;
   service_->GetDocuments(
       gdata_test_server_.GetURL("files/chromeos/gdata/testfile.txt"),
       base::Bind(&TestGetDocumentsCallback, &result, &result_data));
   ui_test_utils::RunMessageLoop();
 
   EXPECT_EQ(gdata::GDATA_PARSE_ERROR, result);
   EXPECT_FALSE(result_data);
 }