public static async Task <IPagedCollection <T> > ApplyPaging <T>(this IQueryable <T> query, IPageParameters paging, CancellationToken cancellationToken = default(CancellationToken))
{
var skip = (paging.PageNumber - 1) * paging.PageSize;
var count = await query.CountAsync(cancellationToken);
if (count == 0)
{
return(PagedCollection <T> .Empty(paging.PageSize));
}
var totalPages = count / paging.PageSize;
if ((count % paging.PageSize) > 0)
{
totalPages++;
}
if (skip >= count)
{
return(new PagedCollection <T>(new T[0], totalPages + 1, totalPages, paging.PageSize));
}
var result = await query.Skip(skip).Take(paging.PageSize).ToListAsync(cancellationToken);
return(new PagedCollection <T>(result, paging.PageNumber, totalPages, paging.PageSize));
}
public async Task ShouldReturnEmptyTeamsByParent(Mock <ITeamsService> teamsService, PageParameters paging, string parent, Mock <IUrlHelper> urlHelper)
{
// Arrange
teamsService.Setup(s => s.GetTeams(parent, paging, It.IsAny <CancellationToken>()))
.ReturnsAsync(PagedCollection <TeamFacade> .Empty(paging.PageSize));
var sut = new TeamsController(teamsService.Object, urlHelper.Object);
// Act
var actionResult = await sut.Get(parent, paging);
// Assert
var okactionRsult = Assert.IsType <OkObjectResult>(actionResult);
var actual = Assert.IsAssignableFrom <PagedResult <TeamFacade> >(okactionRsult.Value);
Assert.Empty(actual.Data);
// Should not create links
Assert.Empty(actual.Links);
}
