Handle pagination on empty list

closes #8

Author: halfdan

lib/scrivener/paginater/list.ex

@@ -24,6 +24,8 @@ defimpl Scrivener.Paginater, for: List do
     Enum.slice(entries, offset, page_size)
   end
 
+  defp total_pages(0, _page_size), do: 1
+
   defp total_pages(total_entries, page_size) do
     ceiling(total_entries / page_size)
   end

test/scrivener_list_test.exs

@@ -171,5 +171,13 @@ defmodule Scrivener.ListTest do
       assert page.total_pages == Float.ceil(length(@languages) / 200)
       assert page.total_entries == @total_entries
     end
+
+    test "can paginate empty list" do
+      page = Scrivener.paginate([], page: 1, page_size: 10)
+
+      assert page.page_number == 1
+      assert page.total_pages == 1
+      assert page.total_entries == 0
+    end
   end
 end