public void AuthorityPriorityIsRespected()
        {
            var higherAuthority =
                createContext.Add(new AuthorityEntity("Higher", defaultAuthority.Priority - 1, "higher")).Entity
                .ToAuthority();

            var thePerson = CreateRepository(createContext).CreatePerson(
                new[]
            {
                Identifiers.NhsNumber("1234567890"),
                Identifiers.Address("22 Medway Street", postcode: "Will Be Replaced")
            },
                defaultAuthority.ToAuthority());

            createContext.SaveChanges();

            var updatedAddress = Identifiers.Address("21 Spine Road", postcode: "Has Replaced");

            CreateRepository(updateContext).UpdatePerson(
                (PersonIdentity)thePerson.Id,
                new[] { updatedAddress },
                higherAuthority);
            updateContext.SaveChanges();

            var newContext = CreateNewContextInSameTransaction();

            CreateRepository(newContext).UpdatePerson(
                (PersonIdentity)thePerson.Id,
                new[] { Identifiers.Address(postcode: "Should Ignore This") },
                defaultAuthority.ToAuthority()
                );
            newContext.SaveChanges();

            var identifiers = readContext.PersonIdentifiers.Where(_ => _.Person == thePerson && _.Deleted == null)
                              .ToArray();

            identifiers.Should().ContainSingleIdentifierValue(Identifiers.Definitions.NhsNumber, "1234567890")
            .And
            .ContainSingleIdentifierValue(updatedAddress);
        }