public async Task TestHashCalculationAsync()
{
FileInfo fileInfo = new FileInfo(GetType().Assembly.Location);
byte[] hash;
using (FileStream fileStream = fileInfo.OpenRead())
using (HashAlgorithm hashCalculator = HashAlgorithm.Create(HashAlgorithmName.Name))
{
hash = hashCalculator.ComputeHash(fileStream);
}
HashStream hashStream;
using (FileStream fileStream = fileInfo.OpenRead())
using (RandomReadNumberStream randomReadStream = new RandomReadNumberStream(fileStream))
using (hashStream = new HashStream(randomReadStream, CryptoStreamMode.Read, HashAlgorithmName))
{
await hashStream.CopyToAsync(Stream.Null);
}
Assert.AreEqual(hash, hashStream.HashResult.HashBytes);
using (FileStream fileStream = fileInfo.OpenRead())
using (RandomReadNumberStream randomReadStream = new RandomReadNumberStream(fileStream))
using (hashStream = new HashStream(Stream.Null, CryptoStreamMode.Write, HashAlgorithmName))
{
await randomReadStream.CopyToAsync(hashStream);
}
Assert.AreEqual(hash, hashStream.HashResult.HashBytes);
}
public async Task TestNoStreamConstructor()
{
FileInfo fileInfo = new FileInfo(GetType().Assembly.Location);
HashStream hashStream1, hashStream2;
using (FileStream fileStream = fileInfo.OpenRead())
using (hashStream1 = new HashStream(fileStream, CryptoStreamMode.Read, HashAlgorithmName))
using (hashStream2 = new HashStream(HashAlgorithmName))
{
await hashStream1.CopyToAsync(Stream.Null);
fileStream.Seek(0, SeekOrigin.Begin);
await fileStream.CopyToAsync(hashStream2);
}
Assert.AreEqual(hashStream1.HashResult, hashStream2.HashResult);
}