public unsafe void ValidatePageChecksumShouldDetectDataCorruption()
{
// Create some random data
var treeNames = new List <string>();
var random = new Random();
var value1 = new byte[random.Next(1024 * 1024 * 2)];
var value2 = new byte[random.Next(1024 * 1024 * 2)];
random.NextBytes(value1);
random.NextBytes(value2);
const int treeCount = 5;
const int recordCount = 6;
using (var env = new StorageEnvironment(StorageEnvironmentOptions.ForPath(DataDir)))
{
env.Options.ManualFlushing = true;
for (int i = 0; i < treeCount; i++)
{
using (var tx = env.WriteTransaction())
{
string name = "tree/" + i;
treeNames.Add(name);
var tree = tx.CreateTree(name);
for (int j = 0; j < recordCount; j++)
{
tree.Add(string.Format("{0}/items/{1}", name, j), j % 2 == 0 ? value1 : value2);
}
tx.Commit();
}
}
env.FlushLogToDataFile();
}
// Lets corrupt something
using (var options = StorageEnvironmentOptions.ForPath(DataDir))
using (var pager = LinuxTestUtils.GetNewPager(options, DataDir, "Raven.Voron"))
using (var tempTX = new TempPagerTransaction())
{
var writePtr = pager.AcquirePagePointer(tempTX, 2) + PageHeader.SizeOf + 43; // just some random place on page #2
for (byte i = 0; i < 8; i++)
{
writePtr[i] = i;
}
}
// Now lets try to read it all back and hope we get an exception
try
{
using (var env = new StorageEnvironment(StorageEnvironmentOptions.ForPath(DataDir)))
{
using (var tx = env.ReadTransaction())
{
foreach (var treeName in treeNames)
{
var tree = tx.CreateTree(treeName);
for (int i = 0; i < recordCount; i++)
{
var readResult = tree.Read(string.Format("{0}/items/{1}", treeName, i));
Assert.NotNull(readResult);
if (i % 2 == 0)
{
var readBytes = new byte[value1.Length];
readResult.Reader.Read(readBytes, 0, readBytes.Length);
}
else
{
var readBytes = new byte[value2.Length];
readResult.Reader.Read(readBytes, 0, readBytes.Length);
}
}
}
}
}
}
catch (Exception e)
{
Assert.True(e is InvalidOperationException || e is InvalidDataException);
}
}