public static void TryGetCurrentHash_TooSmall()
{
Span <byte> buf = stackalloc byte[7];
FlexibleAlgorithm hash = new FlexibleAlgorithm(buf.Length + 1);
Assert.True(hash.IsReset);
hash.Append(buf);
Assert.False(hash.IsReset);
while (true)
{
Assert.False(hash.TryGetCurrentHash(buf, out int written));
Assert.Equal(0, written);
if (buf.IsEmpty)
{
break;
}
buf = buf.Slice(1);
}
Assert.Equal(0, hash.GetCurrentHashCoreCallCount);
Assert.False(hash.IsReset);
}
public static void TryGetHashAndReset_TooBig_Succeeds()
{
Span <byte> buf = stackalloc byte[16];
FlexibleAlgorithm hash = new FlexibleAlgorithm(buf.Length / 2);
int i = 0;
while (buf.Length > hash.HashLengthInBytes)
{
Assert.Equal(i, hash.GetCurrentHashCoreCallCount);
hash.Append(buf);
Assert.False(hash.IsReset);
// TryGetCurrentHash in turn asserts that buf got Sliced down to HashLengthInBytes.
Assert.True(hash.TryGetHashAndReset(buf, out int written));
Assert.Equal(hash.HashLengthInBytes, written);
Assert.True(hash.IsReset);
buf = buf.Slice(1);
i++;
}
Assert.Equal(i, hash.GetCurrentHashCoreCallCount);
Assert.True(hash.IsReset);
}
public static void DefaultGetHashAndResetDoesWhatItSays()
{
Span <byte> buf = stackalloc byte[16];
FlexibleAlgorithm hash = new FlexibleAlgorithm(buf.Length);
Assert.True(hash.IsReset);
hash.Append(buf);
Assert.False(hash.IsReset);
Assert.Equal(0, hash.GetCurrentHashCoreCallCount);
byte[] ret = hash.GetHashAndReset();
Assert.True(hash.IsReset);
Assert.Equal(1, hash.GetCurrentHashCoreCallCount);
Assert.Equal(hash.HashLengthInBytes, ret.Length);
hash.Append(ret);
Assert.False(hash.IsReset);
Assert.True(hash.TryGetHashAndReset(buf, out int written));
Assert.True(hash.IsReset);
Assert.Equal(2, hash.GetCurrentHashCoreCallCount);
Assert.Equal(hash.HashLengthInBytes, written);
hash.Append(ret);
Assert.False(hash.IsReset);
written = hash.GetHashAndReset(buf);
Assert.True(hash.IsReset);
Assert.Equal(3, hash.GetCurrentHashCoreCallCount);
Assert.Equal(hash.HashLengthInBytes, written);
}
public static void AllocatingGetHashAndReset_CorrectSize()
{
FlexibleAlgorithm hash = new FlexibleAlgorithm(12);
byte[] ret = hash.GetHashAndReset();
Assert.Equal(hash.HashLengthInBytes, ret.Length);
Assert.Equal(1, hash.GetCurrentHashCoreCallCount);
}
public static void GetCurrentHash_TooSmall()
{
byte[] buf = new byte[7];
FlexibleAlgorithm hash = new FlexibleAlgorithm(buf.Length + 1);
Assert.True(hash.IsReset);
hash.Append(buf);
Assert.False(hash.IsReset);
for (int i = 0; i <= buf.Length; i++)
{
AssertExtensions.Throws <ArgumentException>(
"destination",
() => hash.GetCurrentHash(buf.AsSpan(i)));
}
Assert.False(hash.IsReset);
}
public static void AppendAsyncNullStreamThrows_OutsideTask()
{
NonCryptographicHashAlgorithm hash = new FlexibleAlgorithm(5);
AssertExtensions.Throws <ArgumentNullException>("stream", () => hash.AppendAsync(null));
}
public static void AppendNullArrayThrows()
{
NonCryptographicHashAlgorithm hash = new FlexibleAlgorithm(5);
AssertExtensions.Throws <ArgumentNullException>("source", () => hash.Append((byte[])null));
}
