public async void MigratedProducerExists_ForUnknownOrNullProducerRegistrationNumber_ReturnsFalse(string producerRegistrationNumber)
        {
            using (var database = new DatabaseWrapper())
            {
                var dataAccess = new GenerateFromXmlDataAccess(database.WeeeContext);
                var result     = await dataAccess.MigratedProducerExists(producerRegistrationNumber);

                Assert.False(result);
            }
        }
        public async void MigratedProducerExists_ForMatchingProducerRegistrationNumber_Returns_True()
        {
            using (var database = new DatabaseWrapper())
            {
                var migratedProducer = new MigratedProducer_();
                migratedProducer.CompanyNumber = "AAA";
                migratedProducer.ProducerName  = "Test producer";
                migratedProducer.ProducerRegistrationNumber = "1234";

                database.Model.MigratedProducer_Set.Add(migratedProducer);
                database.Model.SaveChanges();

                var dataAccess = new GenerateFromXmlDataAccess(database.WeeeContext);
                var result     = await dataAccess.MigratedProducerExists("1234");

                Assert.True(result);
            }
        }