public void returns_known_algorithm(NamedGuidAlgorithm algorithm, Type expectedType, byte expectedVersion)
{
this.algorithm = algorithm;
using (var actualAlgorithm = invoke(out byte version))
{
Assert.IsAssignableFrom(expectedType, actualAlgorithm);
Assert.Equal(expectedVersion, version);
}
}
public void returns_variant_1(NamedGuidAlgorithm algorithm)
{
name = $"{Guid.NewGuid()}";
this.algorithm = algorithm;
var actual = invoke();
// isolate the first two bits
var variant = actual.ToByteArray()[8] & 0b11000000;
// ensure the first bit is on, the second bit is off
Assert.Equal(0b10000000, variant);
}
public void returns_deterministic(NamedGuidAlgorithm algorithm, Guid @namespace, string name, Guid expected)
{
this.@namespace = @namespace;
this.algorithm = algorithm;
this.name = name;
var actual = invoke();
Assert.Equal(expected, actual);
// ensure changing the text yields a different result
this.name += "!";
actual = invoke();
Assert.NotEqual(expected, actual);
}
public void returns_version_for_algorithm(NamedGuidAlgorithm algorithm)
{
name = $"{Guid.NewGuid()}";
this.algorithm = algorithm;
var actual = invoke();
// isolate the first nibble
var version = actual.ToByteArray()[7] & 0b11110000;
switch (algorithm)
{
case NamedGuidAlgorithm.MD5:
Assert.Equal(StandardGuidVersion.UUIDv3, version);
break;
case NamedGuidAlgorithm.SHA1:
Assert.Equal(StandardGuidVersion.UUIDv5, version);
break;
default:
throw new InvalidOperationException();
}
}
#pragma warning restore CS0618
/// <summary>
/// Computes and return a name-based GUID using the given algorithm as defined in https://tools.ietf.org/html/rfc4122#section-4.3.
/// </summary>
/// <param name="algorithm">Hash algorithm to use for generating the name. SHA-1 is recommended.</param>
/// <param name="namespace">Name space identifier.</param>
/// <param name="name">Name for which to create a GUID.</param>
public static Guid Compute(NamedGuidAlgorithm algorithm, Guid @namespace, string name) =>
factory.Compute(algorithm, @namespace, name);
public static Guid Create(NamedGuidAlgorithm algorithm, Guid @namespace, string name) =>
#pragma warning disable CS0618
factory.Create(algorithm, @namespace, name);
public void requires_valid_algorithm()
{
algorithm = default(NamedGuidAlgorithm);
Assert.Throws <NotImplementedException>(() => invoke());
}
public void when_algorithm_unknown_throws()
{
algorithm = default(NamedGuidAlgorithm);
Assert.Throws <NotImplementedException>(() => invoke(out byte version));
}
