[Fact]
public void CustomerRepository_ThrowsException_When_NoUnitOfWorknIsFound()
{
     //Arrange
     var repository = _container.GetRequiredService<ICustomerRepository>();
     var countryName = "Brazil";

     //Act
     void Act() => repository.Find_By_Country(countryName);
     
     //Assert
     Assert.Throws<UnitOfWorkNotFoundException>(Act);
 }