[TestCaseSource("TestCases")]
 public async Task GetOrders(Guid correlationId, Customer customer, int expectedCount)
 {
       //Act
       var orders = await _sut.GetOrders(transportDocument);

       //Assert
       Assert.IsNotNull(orders);
       Assert.AreEqual(expectedCount, orders.Count);
 }

 private static readonly object[] TestCases =
 {
       new object[]{ Guid.NewGuid(), new Customer(){Id=1}, 1 },
       new object[]{ Guid.NewGuid(), new Customer(){Id=1}, 1 },
       new object[]{ Guid.NewGuid(), new Customer(){Id=1}, 1 },
       new object[]{ Guid.NewGuid(), new Customer(){Id=1}, 3 }
};