public void Given_different_input_should_generate_different_Guid()
{
var generator = new DeterministicGuidGenerator(Guid.NewGuid());
var guid1 = generator.Create("stream-1", ExpectedVersion.Any, "some-data");
var guid2 = generator.Create("stream-1", 1, "some-data");
guid2.ShouldNotBe(guid1);
}
/// <summary>
/// Creates a deterministic GUID.
/// </summary>
/// <param name="generator">
/// A <see cref="DeterministicGuidGenerator"/> instance.
/// </param>
/// <param name="streamId">
/// The Stream ID the message is being appended to.
/// </param>
/// <param name="expectedVersion">
/// The expected version of the message.
/// </param>
/// <param name="message">
/// A message to generate the GUID from.
/// </param>
/// <returns>
/// A deterministically generated GUID.
/// </returns>
public static Guid Create(
this DeterministicGuidGenerator generator,
string streamId,
int expectedVersion,
string message)
=> generator.Create(
Encoding.UTF8.GetBytes(message)
.Concat(BitConverter.GetBytes(expectedVersion))
.Concat(Encoding.UTF8.GetBytes(streamId)).ToArray());
static MetadataMessageIdGenerator()
{
s_deterministicGuidGenerator
= new DeterministicGuidGenerator(Guid.Parse("8D1E0B02-0D78-408E-8211-F899BE6F8AA2"));
}