public static int CalculateSkip(BaseFilterEntityModel filterModel)
{
bool isValid = (filterModel.Page > 0) && (filterModel.PageSize > 0);
if (!isValid)
{
return(DefaultSkip);
}
return((filterModel.Page - 1) * filterModel.PageSize);
}
public void ItWillCalculateSkip()
{
var filterModel = new BaseFilterEntityModel
{
Page = 3,
PageSize = 25
};
var skip = PaginationHelper.CalculateSkip(filterModel);
Assert.Equal(50, skip);
}
public void ItWillReturnDefaultTake()
{
var filterModel = new BaseFilterEntityModel
{
Page = -1,
PageSize = -1
};
var take = PaginationHelper.CalculateTake(filterModel);
Assert.Equal(PaginationHelper.DefaultTake, take);
}
public void ItWillCalculateTake()
{
var filterModel = new BaseFilterEntityModel
{
Page = 3,
PageSize = 25
};
var take = PaginationHelper.CalculateTake(filterModel);
Assert.Equal(25, take);
}
public void ItWillReturnDefaultSkip()
{
var filterModel = new BaseFilterEntityModel
{
Page = -1,
PageSize = -1
};
var skip = PaginationHelper.CalculateSkip(filterModel);
Assert.Equal(PaginationHelper.DefaultSkip, skip);
}
public void ItWillCalculateTotalPages()
{
var filterModel = new BaseFilterEntityModel
{
Page = 1,
PageSize = 25
};
int totalRecordCount = 90;
var totalPages = PaginationHelper.CalculateTotalPages(filterModel, totalRecordCount);
Assert.Equal(4, totalPages);
}
public static int CalculateTotalPages(BaseFilterEntityModel filterModel, int totalRecordCount)
{
return((int)Math.Ceiling((decimal)totalRecordCount / (decimal)filterModel.PageSize));
}
public static int CalculateTake(BaseFilterEntityModel filterModel)
{
return((filterModel.PageSize > 0) ? filterModel.PageSize : DefaultTake);
}