public void Conferences_Get_All()
        {
            // Arrange
            using (var context = GetContextWithData())
                using (var controller = new ConferenceController(context))
                {
                    // Act
                    var result = controller.GetAll();

                    // Assert
                    var okResult = result.Should().BeOfType <OkObjectResult>().Subject;
                    var items    = okResult.Value.Should().BeAssignableTo <IEnumerable <ConferenceItem> >().Subject;

                    items.Count().Should().Be(3);
                }
        }