public void GetAllActivities_Succeeds()
{
_activityRepository.Setup(a => a.GetAll()).Returns(_dummyDBContext.Activities);
ActionResult <IEnumerable <Activity> > actionResult = _controller.GetAll();
var response = actionResult?.Result as OkObjectResult;
List <Activity> activities = response?.Value as List <Activity>;
Assert.Equal(200, response?.StatusCode);
Assert.Equal(7, activities.Count);
}