public void DictionaryHashedConsistently()
{
var dictionary = new Dictionary <String, Object> {
{ "Value 1", 1 }, { "Value 2", 2 }, { "Value 3", 3 }
};
Assert.Equal(ObjectHasher.Hash(dictionary), ObjectHasher.Hash(dictionary));
}
public void IgnoreFieldsMarkedWithNonHashedAttribute()
{
var graph = new CustomObject();
graph.NonHashedField = ObjectHasher.Hash(graph);
Assert.Equal(graph.NonHashedField, ObjectHasher.Hash(graph));
}
public void HashFieldsWithNoAttributes()
{
var graph = new CustomObject();
graph.NonHashedField = ObjectHasher.Hash(graph);
graph.NoAttributeField = Guid.NewGuid();
Assert.NotEqual(graph.NonHashedField, ObjectHasher.Hash(graph));
}
public void HashImpactedByDictionaryKeyOrder()
{
Assert.NotEqual(
ObjectHasher.Hash(new Dictionary <String, Object> {
{ "Value 2", 2 }, { "Value 3", 3 }, { "Value 1", 1 }
}),
ObjectHasher.Hash(new Dictionary <String, Object> {
{ "Value 1", 1 }, { "Value 2", 2 }, { "Value 3", 3 }
})
);
}
public void CircularReferenceDoesNotResultInStackOverflow()
{
var dictionary = new Dictionary <String, Object> {
{ "Value 1", 1 }, { "Value 2", 2 }, { "Value 3", 3 }
};
//NOTE: When `Keys` is accessed, a `KeyCollection` instance is created that holds a reference to the underlying `dictionary` and
// would cause a `StackOverflowException` to be thrown if not handled correctly.
Assert.NotNull(dictionary.Keys);
Assert.NotEqual(Guid.Empty, ObjectHasher.Hash(dictionary));
}
/// <summary>
/// Validates the <see cref="Aggregate"/> state against the current checksum (state hash). If <see cref="UpdateHash"/> has not been
/// previously called the aggregate state is assumed to be valid and the checksum is set for future reference.
/// </summary>
/// <remarks>
/// Fields marked with <see cref="IgnoreDataMemberAttribute"/>, <see cref="NonSerializedAttribute"/> and/or <see cref="XmlIgnoreAttribute"/> will not
/// be included when calculating the MD5 hash of this non-recursive object graph.
/// </remarks>
protected internal virtual void VerifyHash()
{
if (checksum == Guid.Empty)
{
UpdateHash();
}
else
{
if (checksum != ObjectHasher.Hash(this))
{
throw new MemberAccessException(Exceptions.StateAccessException.FormatWith(Id));
}
}
}
/// <summary>
/// Update the aggregate checksum based on the currently known <see cref="Aggregate"/> state.
/// </summary>
/// <remarks>
/// Fields marked with <see cref="IgnoreDataMemberAttribute"/>, <see cref="NonSerializedAttribute"/> and/or <see cref="XmlIgnoreAttribute"/> will not
/// be included when calculating the MD5 hash of this non-recursive object graph.
/// </remarks>
protected internal virtual void UpdateHash()
{
checksum = ObjectHasher.Hash(this);
}
public void HashDependentOnValueOrder()
{
Assert.NotEqual(ObjectHasher.Hash(new[] { 1, 2, 3 }), ObjectHasher.Hash(new[] { 3, 2, 1 }));
}
public void CanHashMultiDimensionArray()
{
Assert.Equal(Guid.Parse("db536ce4-08dc-5aa1-46b5-c2f5d95a14b0"), ObjectHasher.Hash(new[, ] {
{ 1, 2, 3 }, { 4, 5, 6 }
}));
}
public void CanHashSingleDimensionArray()
{
Assert.Equal(Guid.Parse("e1d11d2a-9de5-380a-4c26-951e316cd7e6"), ObjectHasher.Hash(new[] { 1, 2, 3 }));
}
public void CanHashEmptyArray()
{
Assert.Equal(Guid.Parse("d98c1dd4-008f-04b2-e980-0998ecf8427e"), ObjectHasher.Hash(new Object[0]));
}
public void AlwaysReturnConsistentHash(String guid, Object value)
{
Assert.Equal(Guid.Parse(guid), ObjectHasher.Hash(value));
}
public void AlwaysReturnConsistentHash()
{
Assert.Equal(Guid.Parse("ad85b893-0dfe-89a0-cdf6-34904fd59f71"), ObjectHasher.Hash(null));
}