public async void GL_BundesbankService_GetBanken()
        {
            var service = new BundesbankService();
            service.BankleitzahlenänderungsdateiService = GetServiceMock().Object;

            var banken = await service.GetBanken(new Bankleitzahlenänderungsdatei());

            Assert.That(banken.Count(), Is.EqualTo(2));
            Assert.That(banken.First().Name, Is.EqualTo("Bank-1"));
            Assert.That(banken.Last().Name, Is.EqualTo("Bank-2"));
        }