public async Task GetBlogElementAsyncNullTest()
        {
            var contentService = new BlogContentService(
                new DbBlogRepositoryBuilder()
                .WithBlogElement(null)
                .Build());
            var result = await contentService.GetBlogElementAsync(0);

            result.Should().BeNull();
        }
        public async Task GetBlogElementAsyncTest()
        {
            var blogElement    = new BlogElementBuilder().Build();
            var contentService = new BlogContentService(
                new DbBlogRepositoryBuilder()
                .WithBlogElement(blogElement)
                .Build());
            var result = await contentService.GetBlogElementAsync(123);

            result.Should().NotBeNull();
            result.Should().Equals(blogElement);
        }