public async Task WhenStreingerReturnOKDataResultOKModel()
{
var algo = new TopAlgorithm();
var search = new preparation.Controllers.SearchController(streinger: strngr, topAlgorithm: algo);
var resp = await search.Index();
NUnitAssert.IsAssignableFrom(typeof(ViewResult), resp);
NUnitAssert.NotNull(resp);
var model = (resp as ViewResult).ViewData.Model;
NUnitAssert.NotNull(model);
NUnitAssert.IsAssignableFrom <IEnumerable <IProduct>[]>(model);
}