public void CastIdentity_throws_exception_when_when_types_are_not_compatible_for_upcast(IdentityTypeCaster sut)
{
IIdentity id = new Identity <long, Person>(5);
Assert.That(() => sut.CastIdentity <Cat>(id), Throws.InstanceOf <InvalidCastException>());
}
public void CastIdentity_returns_same_identity_when_downcast_would_be_valid(IdentityTypeCaster sut)
{
IIdentity id = new Identity <long, Cat>(5);
Assert.That(sut.CastIdentity <Animal>(id), Is.SameAs(id));
}
public void CastIdentity_returns_new_identity_when_types_are_compatible_for_upcast(IdentityTypeCaster sut)
{
IIdentity id = new Identity <long, Animal>(5);
var newId = sut.CastIdentity <Cat>(id);
Assert.That(newId, Is.InstanceOf <Identity <long, Cat> >(), "Correct type");
Assert.That(newId, Is.Not.SameAs(id), "Is a different object");
Assert.That(newId.EntityType, Is.EqualTo(typeof(Cat)), "Correct entity type");
Assert.That(newId.Value, Is.EqualTo(5), "Correct identity value");
}
public void CastIdentity_returns_same_identity_when_types_are_same(IdentityTypeCaster sut)
{
IIdentity id = new Identity <long, Cat>(5);
Assert.That(sut.CastIdentity <Cat>(id), Is.SameAs(id));
}