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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/storage/virtual_file.h"
#include "cobalt/storage/virtual_file_system.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "starboard/client_porting/poem/string_poem.h"
namespace cobalt {
namespace storage {
class VirtualFileSystemTest : public testing::Test {
protected:
VirtualFileSystem vfs_;
};
TEST_F(VirtualFileSystemTest, WriteAndRead) {
VirtualFile* file = vfs_.Open("file1.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(0, file->Size());
int expected[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
file->Write(expected, sizeof(expected), 0);
char out_data[128];
int bytes = file->Read(out_data, sizeof(out_data), 0);
EXPECT_EQ(bytes, sizeof(expected));
EXPECT_EQ(0, memcmp(expected, out_data, sizeof(expected)));
}
TEST_F(VirtualFileSystemTest, ReadWriteOffsets) {
VirtualFile* file = vfs_.Open("file1.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(0, file->Size());
char expected[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
file->Write(expected, sizeof(expected), 0);
// Seek to position 4 and read bytes.
char out_data[128];
int bytes = file->Read(out_data, sizeof(out_data), 4);
const int kDataSize = 6;
EXPECT_EQ(kDataSize, bytes);
EXPECT_EQ(0, memcmp(&expected[4], out_data, kDataSize));
// Write some bytes into the middle
file->Write(expected, 3, 3);
char expected1[] = {0, 1, 2, 0, 1, 2, 6, 7, 8, 9};
EXPECT_EQ(sizeof(expected1), file->Size());
bytes = file->Read(out_data, sizeof(out_data), 0);
EXPECT_EQ(0, memcmp(expected1, out_data, static_cast<size_t>(bytes)));
// Try to read past the end.
const int kOffsetPastEnd = 100000;
bytes = file->Read(out_data, sizeof(out_data), kOffsetPastEnd);
EXPECT_EQ(0, bytes);
// Try to write past the end.
file->Write(expected, sizeof(expected), kOffsetPastEnd);
EXPECT_EQ(kOffsetPastEnd + sizeof(expected), file->Size());
// Make sure the write past the end worked.
bytes = file->Read(out_data, sizeof(out_data), kOffsetPastEnd);
EXPECT_EQ(0, memcmp(expected, out_data, static_cast<size_t>(bytes)));
}
TEST_F(VirtualFileSystemTest, Open) {
// Create a few files and write some data
VirtualFile* file = vfs_.Open("file1.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(0, file->Size());
// Write a few bytes of random data.
file->Write("test", 4, 0);
EXPECT_EQ(4, file->Size());
// Open a new file
file = vfs_.Open("file2.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(0, file->Size());
// Try to reopen the existing file.
file = vfs_.Open("file1.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(4, file->Size());
}
TEST_F(VirtualFileSystemTest, Truncate) {
VirtualFile* file = vfs_.Open("file1.tmp");
ASSERT_TRUE(file);
EXPECT_EQ(0, file->Size());
const char* data = "test";
char file_contents[4];
// Write a few bytes of random data.
file->Write(data, 4, 0);
EXPECT_EQ(4, file->Size());
int bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(4, bytes);
EXPECT_EQ(0, memcmp(file_contents, data, static_cast<size_t>(bytes)));
file->Truncate(3);
EXPECT_EQ(3, file->Size());
bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(3, bytes);
EXPECT_EQ(0, memcmp(file_contents, data, static_cast<size_t>(bytes)));
file->Truncate(0);
EXPECT_EQ(0, file->Size());
bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(0, bytes);
}
TEST_F(VirtualFileSystemTest, SerializeDeserialize) {
// Create a few files and write some data
VirtualFile* file = vfs_.Open("file1.tmp");
EXPECT_TRUE(file != NULL);
const char data1[] = "abc";
int data1_size = 3;
file->Write(data1, data1_size, 0);
file = vfs_.Open("file2.tmp");
EXPECT_TRUE(file != NULL);
const char data2[] = "defg";
int data2_size = 4;
file->Write(data2, data2_size, 0);
file = vfs_.Open("file3.tmp");
EXPECT_TRUE(file != NULL);
const char data3[] = "";
int data3_size = 0;
file->Write(data3, data3_size, 0);
// First perform a dry run to figure out how much space we need.
int bytes = vfs_.Serialize(NULL, true /*dry run*/);
scoped_array<uint8> buffer(new uint8[static_cast<size_t>(bytes)]);
// Now serialize and deserialize
vfs_.Serialize(buffer.get(), false /*dry run*/);
// Deserialize the data into a new vfs
VirtualFileSystem new_vfs;
ASSERT_TRUE(new_vfs.Deserialize(buffer.get(), bytes));
// Make sure the new vfs contains all the expected data.
char file_contents[VirtualFile::kMaxVfsPathname];
file = new_vfs.Open("file1.tmp");
EXPECT_TRUE(file != NULL);
bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(data1_size, bytes);
EXPECT_EQ(0, memcmp(file_contents, data1, static_cast<size_t>(bytes)));
file = new_vfs.Open("file2.tmp");
EXPECT_TRUE(file != NULL);
bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(data2_size, bytes);
EXPECT_EQ(0, memcmp(file_contents, data2, static_cast<size_t>(bytes)));
file = new_vfs.Open("file3.tmp");
EXPECT_TRUE(file != NULL);
bytes = file->Read(file_contents, sizeof(file_contents), 0);
EXPECT_EQ(data3_size, bytes);
EXPECT_EQ(0, memcmp(file_contents, data3, static_cast<size_t>(bytes)));
}
TEST_F(VirtualFileSystemTest, DeserializeTruncated) {
// Create a few files and write some data
VirtualFile* file = vfs_.Open("file1.tmp");
EXPECT_TRUE(file != NULL);
const char data1[] = "abc";
int data1_size = 3;
file->Write(data1, data1_size, 0);
file = vfs_.Open("file2.tmp");
EXPECT_TRUE(file != NULL);
const char data2[] = "defg";
int data2_size = 4;
file->Write(data2, data2_size, 0);
// First perform a dry run to figure out how much space we need.
int bytes = vfs_.Serialize(NULL, true /*dry run*/);
scoped_array<uint8> buffer(new uint8[static_cast<size_t>(bytes)]);
// Now serialize and deserialize
vfs_.Serialize(buffer.get(), false /*dry run*/);
for (int i = 1; i < bytes; i++) {
// Corrupt the header
VirtualFileSystem::SerializedHeader header;
memcpy(&header, buffer.get(), sizeof(header));
header.file_size = header.file_size - i;
memcpy(buffer.get(), &header, sizeof(header));
// Deserialize the data into a new vfs
VirtualFileSystem new_vfs;
EXPECT_FALSE(new_vfs.Deserialize(buffer.get(), bytes - i));
}
}
TEST_F(VirtualFileSystemTest, DeserializeBadData) {
scoped_array<uint8> buffer(new uint8[0]);
EXPECT_EQ(false, vfs_.Deserialize(buffer.get(), 0));
EXPECT_EQ(false, vfs_.Deserialize(buffer.get(), -1));
buffer.reset(new uint8[1]);
EXPECT_EQ(false, vfs_.Deserialize(buffer.get(), 1));
buffer.reset(new uint8[sizeof(VirtualFileSystem::SerializedHeader)]);
VirtualFileSystem::SerializedHeader header = {};
header.version = -1;
memcpy(buffer.get(), &header, sizeof(header));
EXPECT_EQ(false,
vfs_.Deserialize(buffer.get(),
sizeof(VirtualFileSystem::SerializedHeader)));
memcpy(&(header.version), "SAV0", sizeof(header.version));
header.file_size = sizeof(VirtualFileSystem::SerializedHeader);
memcpy(buffer.get(), &header, sizeof(header));
EXPECT_EQ(true,
vfs_.Deserialize(buffer.get(),
sizeof(VirtualFileSystem::SerializedHeader)));
ASSERT_EQ(0, vfs_.ListFiles().size());
}
TEST_F(VirtualFileSystemTest, GetHeaderVersion) {
VirtualFileSystem::SerializedHeader header;
memset(&header, 0, sizeof(header));
header.file_size = sizeof(header);
COMPILE_ASSERT(sizeof(header.version) == sizeof("SAV0") - 1,
Invalid_header_version_size);
memcpy(&header.version, "XYZW", sizeof(header.version));
EXPECT_EQ(-1, VirtualFileSystem::GetHeaderVersion(header));
memcpy(&header.version, "SAV0", sizeof(header.version));
EXPECT_EQ(0, VirtualFileSystem::GetHeaderVersion(header));
memcpy(&header.version, "SAV1", sizeof(header.version));
EXPECT_EQ(1, VirtualFileSystem::GetHeaderVersion(header));
}
} // namespace storage
} // namespace cobalt