| // 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 "net/disk_cache/flash/flash_cache_test_base.h" |
| #include "net/disk_cache/flash/format.h" |
| #include "net/disk_cache/flash/log_store.h" |
| #include "net/disk_cache/flash/segment.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace disk_cache { |
| |
| TEST_F(FlashCacheTest, LogStoreCreateEntry) { |
| const int32 kSize = 100; |
| const std::string buf(kSize, 0); |
| |
| int32 id; |
| EXPECT_TRUE(log_store_->CreateEntry(kSize, &id)); |
| EXPECT_TRUE(log_store_->WriteData(buf.data(), kSize/2)); |
| EXPECT_TRUE(log_store_->WriteData(buf.data(), kSize/2)); |
| log_store_->CloseEntry(id); |
| } |
| |
| // Also tests reading from current segment. |
| TEST_F(FlashCacheTest, LogStoreOpenEntry) { |
| const int32 kSize = 100; |
| const std::vector<char> expected(kSize, 'b'); |
| |
| int32 id; |
| EXPECT_TRUE(log_store_->CreateEntry(kSize, &id)); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize)); |
| log_store_->CloseEntry(id); |
| |
| EXPECT_TRUE(log_store_->OpenEntry(id)); |
| std::vector<char> actual(kSize, 0); |
| EXPECT_TRUE(log_store_->ReadData(id, &actual[0], kSize, 0)); |
| log_store_->CloseEntry(id); |
| |
| EXPECT_EQ(expected, actual); |
| } |
| |
| // Also tests that writing advances segments. |
| TEST_F(FlashCacheTest, LogStoreReadFromClosedSegment) { |
| const int32 kSize = disk_cache::kFlashSegmentFreeSpace; |
| const std::vector<char> expected(kSize, 'a'); |
| |
| // First two entries go to segment 0. |
| int32 id1; |
| EXPECT_EQ(0, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->CreateEntry(kSize/2, &id1)); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize/2)); |
| log_store_->CloseEntry(id1); |
| |
| int32 id2; |
| EXPECT_EQ(0, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->CreateEntry(kSize/2, &id2)); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize/2)); |
| log_store_->CloseEntry(id2); |
| |
| // This entry goes to segment 1. |
| int32 id3; |
| EXPECT_TRUE(log_store_->CreateEntry(kSize, &id3)); |
| EXPECT_EQ(1, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize)); |
| log_store_->CloseEntry(id3); |
| |
| // We read from segment 0. |
| EXPECT_TRUE(log_store_->OpenEntry(id1)); |
| std::vector<char> actual(kSize, 0); |
| EXPECT_TRUE(log_store_->ReadData(id1, &actual[0], kSize, id1)); |
| log_store_->CloseEntry(id1); |
| |
| EXPECT_EQ(expected, actual); |
| } |
| |
| TEST_F(FlashCacheTest, LogStoreReadFromCurrentAfterClose) { |
| const int32 kSize = disk_cache::kFlashSegmentFreeSpace; |
| const std::vector<char> expected(kSize, 'a'); |
| |
| int32 id1; |
| EXPECT_EQ(0, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->CreateEntry(kSize/2, &id1)); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize/2)); |
| log_store_->CloseEntry(id1); |
| |
| // Create a reference to above entry. |
| EXPECT_TRUE(log_store_->OpenEntry(id1)); |
| |
| // This entry fills the first segment. |
| int32 id2; |
| EXPECT_EQ(0, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->CreateEntry(kSize/2, &id2)); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize/2)); |
| log_store_->CloseEntry(id2); |
| |
| // Creating this entry forces closing of the first segment. |
| int32 id3; |
| EXPECT_TRUE(log_store_->CreateEntry(kSize, &id3)); |
| EXPECT_EQ(1, log_store_->write_index_); |
| EXPECT_TRUE(log_store_->WriteData(&expected[0], kSize)); |
| log_store_->CloseEntry(id3); |
| |
| // Now attempt to read from the closed segment. |
| std::vector<char> actual(kSize, 0); |
| EXPECT_TRUE(log_store_->ReadData(id1, &actual[0], kSize, id1)); |
| log_store_->CloseEntry(id1); |
| |
| EXPECT_EQ(expected, actual); |
| } |
| |
| // TODO(agayev): Add a test that confirms that in-use segment is not selected as |
| // the next write segment. |
| |
| } // namespace disk_cache |