Add a test for different response when first is given by client

Author: rmosolgo

lib/graphql/pagination/relation_connection.rb

@@ -29,14 +29,14 @@ def has_previous_page
 
       def has_next_page
         if @has_next_page.nil?
-          @has_next_page = if before_offset && before_offset > 0
-            true
-          elsif first && first_value
+          @has_next_page = if first && first_value
             if @nodes && @nodes.count < first
               false
             else
               relation_larger_than(sliced_nodes, @sliced_nodes_offset, first)
             end
+          elsif before_offset && before_offset > 0
+            true
           else
             false
           end

spec/support/connection_assertions.rb

@@ -253,6 +253,11 @@ def assert_names(expected_names, result)
           assert_equal true, get_page_info(res, "hasNextPage")
           assert_equal true, get_page_info(res, "hasPreviousPage")
           assert_names [], res
+
+          res = exec_query(query_str, after: after_cursor, before: before_cursor, first: 3)
+          assert_equal false, get_page_info(res, "hasNextPage")
+          assert_equal true, get_page_info(res, "hasPreviousPage")
+          assert_names [], res
         end
 
         it "handles out-of-bounds cursors" do