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#include <gtest/gtest.h>
#include <megafs.h>
namespace mega
{
namespace testing
{
struct FileAccessTests: ::testing::Test
{
FileAccessTests():
Test(),
mFilesystem(),
mFilePath(LocalPath::fromAbsolutePath("file")),
mFileAccess(mFilesystem.newfileaccess(false))
{}
// Called before each test in our fixture executes.
void SetUp() override
{
// Make sure we have no state from a prior test run.
auto unlinked = mFilesystem.unlinklocal(mFilePath);
// Unlinking was successful or the file didn't exist.
ASSERT_TRUE(unlinked || !mFilesystem.target_exists);
// Convenience.
auto logOnError = FSLogging::logOnError;
// Make sure our test file is open for IO.
ASSERT_TRUE(mFileAccess->fopen(mFilePath, true, true, logOnError));
}
// How we interface with the local filesystem.
FSACCESS_CLASS mFilesystem;
// The path to our test file.
LocalPath mFilePath;
// How we read and write our test file.
FileAccessPtr mFileAccess;
}; // FileAccessTests
TEST_F(FileAccessTests, frawread_fwrite)
{
// Data for us to write to disk.
static const std::string expected = "AAAABBBBCCCCDDDD";
// Write data in reverse order, in groups of four characters.
for (std::size_t i = 0, j = expected.size(); i != j; i += 4)
{
// Compute offset.
auto offset = static_cast<m_off_t>(j - i - 4);
// Tracks how much data we wrote to disk.
auto count = 0ul;
// Try and write four characters to disk.
ASSERT_TRUE(mFileAccess->fwrite(expected.data() + offset, 4, offset, &count));
// Make sure we actually wrote four characters to disk.
ASSERT_EQ(count, 4ul);
}
// Where we'll store the data we've read.
std::string computed(4, '\0');
// Read data in order, in groups of four characters.
for (std::size_t i = 0ul, j = expected.size() - 4; i != j; i += 4)
{
// Convenience.
auto logOnError = FSLogging::logOnError;
// Convenience.
auto offset = static_cast<m_off_t>(i);
// Try and read four characters from disk.
ASSERT_TRUE(mFileAccess->frawread(computed.data(), 4, offset, true, logOnError));
// Make sure we've read what we expected.
ASSERT_FALSE(expected.compare(i, 4, computed));
}
// Convenience.
auto noLogging = FSLogging::noLogging;
// Make sure frawread(...) fails if it can't read everything.
ASSERT_FALSE(mFileAccess->frawread(computed.data(), 4, 14, true, noLogging));
}
TEST_F(FileAccessTests, fread)
{
// Data we want to write to disk.
static const std::string expected = "ABCD";
// Convenience.
auto logOnError = FSLogging::logOnError;
// Try and write the data to disk.
ASSERT_TRUE(mFileAccess->fwrite(expected.data(), 4, 0));
// Where we'll store the data we've read from disk.
std::string computed;
// Read without padding.
ASSERT_TRUE(mFileAccess->fread(&computed, 4, 0, 0, logOnError));
// Make sure we've read what we expected.
EXPECT_EQ(computed, expected);
// Clear the string.
computed = std::string(6, '!');
// Read with padding.
ASSERT_TRUE(mFileAccess->fread(&computed, 2, 6, 2, logOnError));
// Make sure the string was correctly padded.
EXPECT_EQ(computed, std::string("CD\0\0\0\0\0\0", 8));
}
} // testing
} // mega
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