public void Content_is_found_by_random_index()
        {
            var result = sut.GetNextContent();

            result.Message.Should().Be("m3");

            result = sut.GetNextContent();
            result.Message.Should().Be("m1");

            result = sut.GetNextContent();
            result.Message.Should().Be("m2");

            result = sut.GetNextContent();
            result.Message.Should().Be("m4");

            result = sut.GetNextContent();
            result.Message.Should().Be("m5");
        }