public async Task Get()
{
var controller = new StatisticController(_datasetRepository, _statisticService);
var result = await controller.Get("datasetId");
var okResult = Assert.IsType <OkObjectResult>(result);
var value = Assert.IsType <StatisticModel>(okResult.Value);
Assert.Equal(200, okResult.StatusCode);
Assert.Equal(5, value.UsersCount);
Assert.Equal(1.33, value.AverageFriendsPerUser);
}