Evict drive cache with file download from website if necessary.

chrome/browser/chromeos/drive/download_handler_unittest.cc

 // Copyright (c) 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 "chrome/browser/chromeos/drive/download_handler.h"
 
 #include "base/files/scoped_temp_dir.h"
+#include "base/run_loop.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/test/base/testing_profile.h"
 #include "components/drive/dummy_file_system.h"
 #include "components/drive/file_system_core_util.h"
 #include "content/public/test/mock_download_item.h"
 #include "content/public/test/mock_download_manager.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_utils.h"
 #include "google_apis/drive/test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 17 matching lines @@
         error_ == FILE_ERROR_OK ? new ResourceEntry : NULL));
   }
 
   void CreateDirectory(const base::FilePath& directory_path,
                        bool is_exclusive,
                        bool is_recursive,
                        const FileOperationCallback& callback) override {
     callback.Run(error_);
   }
 
+  void FreeDiskSpaceIfNeededFor(
+      int64 num_bytes,
+      const FreeDiskSpaceCallback& callback) override {
+    free_disk_space_if_needed_for_num_bytes_.push_back(num_bytes);
+    callback.Run(true);
+  }
+
+  std::vector<int64> free_disk_space_if_needed_for_num_bytes_;
+
  private:
   FileError error_;
 };
 
 }  // namespace
 
 class DownloadHandlerTest : public testing::Test {
  public:
   DownloadHandlerTest()
       : download_manager_(new content::MockDownloadManager) {}
 
   void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
 
     // Set expectations for download item.
     EXPECT_CALL(download_item_, GetState())
         .WillRepeatedly(testing::Return(content::DownloadItem::IN_PROGRESS));
 
     download_handler_.reset(new DownloadHandler(&test_file_system_));
     download_handler_->Initialize(download_manager_.get(), temp_dir_.path());
+    download_handler_->SetFreeDiskSpaceDelayForTesting(
+        base::TimeDelta::FromMilliseconds(0));
   }
 
  protected:
   base::ScopedTempDir temp_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
   TestingProfile profile_;
   scoped_ptr<content::MockDownloadManager> download_manager_;
   DownloadHandlerTestFileSystem test_file_system_;
   scoped_ptr<DownloadHandler> download_handler_;
   content::MockDownloadItem download_item_;
@@ skipping 114 matching lines @@
   // Call CheckForFileExistence again.
   download_handler_->CheckForFileExistence(
       &download_item_,
       google_apis::test_util::CreateCopyResultCallback(&file_exists));
   content::RunAllBlockingPoolTasksUntilIdle();
 
   // Check the result.
   EXPECT_FALSE(file_exists);
 }
 
+TEST_F(DownloadHandlerTest, FreeDiskSpaceForUnknownSizeDownload) {
+  const int kUnknownSizeDownloadRequestSize = 512 * (1 << 20);  // 512MB
+  ASSERT_EQ(0u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  EXPECT_CALL(download_item_, IsDone()).WillRepeatedly(testing::Return(false));
+  EXPECT_CALL(download_item_, GetTotalBytes())
+      .WillRepeatedly(testing::Return(0));
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           true /* immediate */);
+  ASSERT_EQ(1u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  ASSERT_EQ(kUnknownSizeDownloadRequestSize,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_[0]);
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           false /* not immediate */);
+
+  // FreeDiskSpaceIfNeededFor should be rate limited.
+  ASSERT_EQ(1u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           false /* not immediate */);
+  base::RunLoop().RunUntilIdle();
+
+  ASSERT_EQ(2u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  ASSERT_EQ(kUnknownSizeDownloadRequestSize,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_[1]);
+}
+
+TEST_F(DownloadHandlerTest, FreeDiskSpaceForKnownSizeDownload) {
+  const int kKnownDownloadSize = 5 * (1 << 20);  // 5MB
+  ASSERT_EQ(0u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  EXPECT_CALL(download_item_, IsDone()).WillRepeatedly(testing::Return(false));
+  EXPECT_CALL(download_item_, GetTotalBytes())
+      .WillRepeatedly(testing::Return(kKnownDownloadSize));
+  EXPECT_CALL(download_item_, GetReceivedBytes())
+      .WillOnce(testing::Return(0))
+      .WillOnce(testing::Return(100));
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           true /* immediate */);
+
+  ASSERT_EQ(1u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  ASSERT_EQ(kKnownDownloadSize,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_[0]);
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           false /* not immediate */);
+  base::RunLoop().RunUntilIdle();
+
+  ASSERT_EQ(2u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  ASSERT_EQ(kKnownDownloadSize - 100,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_[1]);
+}
+
+TEST_F(DownloadHandlerTest, FreeDiskSpaceForAlreadyCompletedDownload) {
+  ASSERT_EQ(0u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+  EXPECT_CALL(download_item_, IsDone()).WillOnce(testing::Return(true));
+
+  download_handler_->FreeDiskSpaceIfNeeded(&download_item_,
+                                           true /* immediate */);
+
+  ASSERT_EQ(0u,
+            test_file_system_.free_disk_space_if_needed_for_num_bytes_.size());
+}
+
 }  // namespace drive