add another test asserting the levels

lib/radiator/outline.ex

@@ -212,7 +212,8 @@ defmodule Radiator.Outline do
           content: content,
           parent_id: binaray_uuid_to_ecto_uuid(parent_id),
           prev_id: binaray_uuid_to_ecto_uuid(prev_id),
-          level: level
+          level: level,
+          episode_id: episode_id
         }
       end)
 

test/radiator/outline_test.exs

@@ -349,6 +349,34 @@ defmodule Radiator.OutlineTest do
         node.level
       end)
     end
+
+    test "associated the correct level", %{
+      node_1: node_1,
+      node_2: node_2,
+      node_3: node_3,
+      node_4: node_4,
+      node_5: node_5,
+      node_6: node_6,
+      nested_node_1: nested_node_1,
+      nested_node_2: nested_node_2,
+      parent_node: parent_node
+    } do
+      {:ok, tree} = Outline.get_node_tree(parent_node.episode_id)
+      assert_level_for_node(tree, parent_node, 0)
+      assert_level_for_node(tree, node_1, 1)
+      assert_level_for_node(tree, node_2, 1)
+      assert_level_for_node(tree, node_3, 1)
+      assert_level_for_node(tree, node_4, 1)
+      assert_level_for_node(tree, node_5, 1)
+      assert_level_for_node(tree, node_6, 1)
+      assert_level_for_node(tree, nested_node_1, 2)
+      assert_level_for_node(tree, nested_node_2, 2)
+    end
+  end
+
+  defp assert_level_for_node(tree, node, level) do
+    node = Enum.filter(tree, fn n -> n.uuid == node.uuid end) |> List.first()
+    assert node.level == level
   end
 
   defp complex_node_fixture(_) do