test(controllers/notification): add setup for notification test

lib/epochtalk_server/models/mention.ex

@@ -46,8 +46,8 @@ defmodule EpochtalkServer.Models.Mention do
   def create_changeset(mention, attrs) do
     now = NaiveDateTime.truncate(NaiveDateTime.utc_now(), :second)
 
-    attrs =
-      attrs
+    mention =
+      mention
       |> Map.put(:created_at, now)
 
     mention

test/epochtalk_server_web/controllers/notification_test.exs

@@ -1,7 +1,51 @@
 defmodule Test.EpochtalkServerWeb.Controllers.Notification do
   use Test.Support.ConnCase, async: true
+  import Test.Support.Factory
+  alias EpochtalkServer.Models.Mention
   alias EpochtalkServer.Models.Notification
 
+  setup %{users: %{user: user, admin_user: admin_user}} do
+    board = insert(:board)
+    category = insert(:category)
+
+    build(:board_mapping,
+      attributes: [
+        [category: category, view_order: 0],
+        [board: board, category: category, view_order: 1]
+      ]
+    )
+
+    [thread_data] = build_list(1, :thread, board: board, user: user)
+
+    post_id = thread_data.post.id
+    thread_id = thread_data.post.thread_id
+
+    mention = %{
+      "thread_id" => thread_id,
+      "post_id" => post_id,
+      "mentioner_id" => user.id,
+      "mentionee_id" => admin_user.id
+    }
+
+    # create mention
+    {:ok, mention} = Mention.create(mention)
+
+    notification = %{
+      "sender_id" => user.id,
+      "receiver_id" => admin_user.id,
+      "type" => "user",
+      "data" => %{
+        action: "refreshMentions",
+        mention_id: mention.id
+      }
+    }
+
+    # create notification associated with mention (for mentions dropdown)
+    Notification.create(notification)
+
+    :ok
+  end
+
   describe "counts/2" do
     test "when unauthenticated, returns Unauthorized error", %{conn: conn} do
       response =