public void BeginScope_forwards_call_to_ServiceProvider([Frozen] IServiceProvider serviceProvider, ServiceProviderContainer sut, IServiceScopeFactory scopeFactory)
        {
            Mock.Get(serviceProvider).Setup(p => p.GetService(typeof(IServiceScopeFactory))).Returns(scopeFactory);

            var scope = sut.BeginScope();

            Assert.That(scope, Is.InstanceOf <ServiceProviderScope>());

            Mock.Get(serviceProvider).Verify(p => p.GetService(typeof(IServiceScopeFactory)));
        }