public void NullValuesAreHashable()
{
PAssert.That(() => FieldwiseHasher.Hash <SampleStruct?>(null) == FieldwiseHasher.Hash <SampleStruct?>(null));
PAssert.That(() => FieldwiseHasher.Hash <SampleStruct?>(null) != FieldwiseHasher.Hash <SampleStruct?>(default(SampleStruct)));
PAssert.That(() => FieldwiseHasher.Hash <SampleClass>(null) == FieldwiseHasher.Hash <SampleClass>(null));
PAssert.That(() => FieldwiseHasher.Hash <SampleClass>(null) != FieldwiseHasher.Hash <SampleStruct?>(null));
}
public void ClassStructFieldsAffectHash()
{
var object1 = new SampleClass {
PlainStruct = new CustomStruct {
Bla = 1
}
};
var object2 = new SampleClass {
PlainStruct = new CustomStruct {
Bla = 2
}
};
var object3A = new SampleClass {
PlainStruct = new CustomStruct {
Bla = 3
}
};
var object3B = new SampleClass {
PlainStruct = new CustomStruct {
Bla = 3
}
};
PAssert.That(() => FieldwiseHasher.Hash(object1) != FieldwiseHasher.Hash(object2));
PAssert.That(() => FieldwiseHasher.Hash(object3A) == FieldwiseHasher.Hash(object3B));
}
public void IdenticalObjectsHaveIdenticalHashes()
{
//it's important that this is a class not struct instance so we've checked that
//also, that means we're accessing another assemblies private fields
PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
== FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4)));
}
public void TypeMattersAtCompileTime() => PAssert.That(() =>
FieldwiseHasher.Hash(new SampleClass {
AnEnum = SampleEnum.Q
})
!= FieldwiseHasher.Hash(new SampleSubClass {
AnEnum = SampleEnum.Q
})
);
public void NonIdenticalValuesHaveDifferentHash()
{
var a = new SampleSubWithPrivateInherited(1);
var b = new SampleSubWithPrivateInherited(2);
PAssert.That(() =>
FieldwiseHasher.Hash(a) != FieldwiseHasher.Hash(b) &&
!ReferenceEquals(a, b)
);
}
public void IdenticalValuesHaveSameHash()
{
var a = new SampleSubWithProtectedInherited(1);
var b = new SampleSubWithProtectedInherited(1);
PAssert.That(() =>
FieldwiseHasher.Hash(a) == FieldwiseHasher.Hash(b) &&
!ReferenceEquals(a, b)
);
}
public void OneDifferentObjectMemberChangesHash()
{
PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
!= FieldwiseHasher.Hash(Tuple.Create(11, 2, "3", 4)));
PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
!= FieldwiseHasher.Hash(Tuple.Create(1, 12, "3", 4)));
PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
!= FieldwiseHasher.Hash(Tuple.Create(1, 2, "13", 4)));
PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
!= FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 14)));
}
public void AutoPropsAffectHash()
{
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleClass {
AutoPropWithPrivateBackingField = "x"
})
== FieldwiseHasher.Hash(new SampleClass {
AutoPropWithPrivateBackingField = "x"
}));
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleClass {
AutoPropWithPrivateBackingField = "x"
})
!= FieldwiseHasher.Hash(new SampleClass {
AutoPropWithPrivateBackingField = "y"
}));
}
public void ClassNullableIntFieldsAffectHash()
{
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleClass {
NullableField = null
})
!= FieldwiseHasher.Hash(new SampleClass {
NullableField = 1
}));
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleClass {
NullableField = 3
})
== FieldwiseHasher.Hash(new SampleClass {
NullableField = 3
}));
}
public void StructIntFieldsAffectHash()
{
PAssert.That(() =>
FieldwiseHasher.Hash(new CustomStruct {
Bla = 1
})
!= FieldwiseHasher.Hash(new CustomStruct {
Bla = 2
}));
PAssert.That(() =>
FieldwiseHasher.Hash(new CustomStruct {
Bla = 3
})
== FieldwiseHasher.Hash(new CustomStruct {
Bla = 3
}));
}
public void SubClassesCheckBaseClassFields()
{
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleSubClassWithFields {
AnEnum = SampleEnum.Q
})
!= FieldwiseHasher.Hash(new SampleSubClassWithFields {
AnEnum = SampleEnum.P
}));
PAssert.That(() =>
FieldwiseHasher.Hash(new SampleSubClassWithFields {
AnEnum = SampleEnum.Q
})
== FieldwiseHasher.Hash(new SampleSubClassWithFields {
AnEnum = SampleEnum.Q
}));
}
public void IdenticalObjectsHaveIdenticalHashes() => PAssert.That(() =>
FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
== FieldwiseHasher.Hash(Tuple.Create(1, 2, "3", 4))
);
