static ICollection <CacheValue> Resolve(ICollection <byte[]> keys)
{
if (keys.Count == 0)
{
return(Array.Empty <CacheValue>());
}
var result = new List <CacheValue>();
var comparer = new ByteArrayComparer();
using (var ms = new MemoryStream())
foreach (var key in keys)
{
ms.SetLength(0);
ms.Write(key, 0, key.Length);
ms.Position = 0;
var k = ProtoBuf.Serializer.Deserialize <byte[]>(ms);
var hash = comparer.GetHashCode(k);
var random = new Random(hash);
var length = Math.Max((hash & 0xff) << 8, 256);
var data = new byte[length];
random.NextBytes(data);
ms.SetLength(0);
ProtoBuf.Serializer.Serialize(ms, data);
result.Add(new CacheValue(key, ms.ToArray(), TimeSpan.FromSeconds(60)));
}
return(result);
}
public void ByteArrayComparer_GetHashCode_Test()
{
var comparer = new ByteArrayComparer();
var items = new[]
{
Tuple.Create(new byte[] { 1, 2, 3 }, new byte[] { 1, 2, 3 }, true),
Tuple.Create(new byte[] { 1, 2, 3 }, new byte[] { 1, 2 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4 }, new byte[] { 1, 2, 3, 4 }, true),
Tuple.Create(new byte[] { 1, 2, 3, 4 }, new byte[] { 0, 2, 3, 41 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }, new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }, true),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }, new byte[] { 1, 2, 3, 4, 5, 6, 7, 9 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 }, new byte[] { 1, 2, 3, 4, 4, 6, 7, 8 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, true),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, new byte[] { 1, 2, 3, 4, 5, 6, 7, 9, 9, 10 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 11 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 },
new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }, true),
Tuple.Create(new byte[] { 10, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 160 },
new byte[] { 10, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 160 }, true),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 },
new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 },
new byte[] { 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }, false),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 10 }, new byte[] { 1, 2, 3, 4, 5, 10 }, true),
Tuple.Create(new byte[] { 1, 2, 3, 4, 5, 10 }, new byte[] { 2, 2, 3, 4, 5, 11 }, false)
};
foreach (var item in items)
{
if (item.Item3)
{
Assert.AreEqual(comparer.GetHashCode(item.Item1), comparer.GetHashCode(item.Item2));
}
else
{
Assert.AreNotEqual(comparer.GetHashCode(item.Item1), comparer.GetHashCode(item.Item2),
"For value: " + string.Join(", ", item.Item1));
}
}
}
/// <inheritdoc />
public override int GetHashCode()
{
var hashCode = ByteComparer.GetHashCode(_payload);
foreach (var contentHash in _contentHashes)
{
unchecked {
hashCode = (hashCode * 17) ^ contentHash.GetHashCode();
}
}
return(hashCode);
}
/// <inheritdoc />
public override int GetHashCode()
{
return(ContentHash.GetHashCode() ^ ByteComparer.GetHashCode(Output));
}
public void NullsLessThanNonNulls()
{
var b = new byte[0];
Assert.True(_comparer.Compare(null, b) < 0);
Assert.True(_comparer.Compare(b, null) > 0);
Assert.NotEqual(_comparer.GetHashCode(null), _comparer.GetHashCode(b));
}
