test: fix tests

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon/posts/posts.ex

@@ -110,10 +110,13 @@ defmodule Mobilizon.Posts do
   def update_post(%Post{} = post, attrs) do
     Cachable.clear_all_caches(post)
 
-    post
-    |> Repo.preload([:tags, :media])
-    |> Post.changeset(attrs)
-    |> Repo.update()
+    with {:ok, %Post{} = post} <-
+           post
+           |> Repo.preload(@post_preloads)
+           |> Post.changeset(attrs)
+           |> Repo.update() do
+      {:ok, Repo.preload(post, @post_preloads)}
+    end
   end
 
   @doc """

lib/service/export/icalendar.ex

@@ -8,7 +8,7 @@ defmodule Mobilizon.Service.Export.ICalendar do
   alias Mobilizon.{Config, Events}
   alias Mobilizon.Events.{Event, EventOptions}
   alias Mobilizon.Service.Export.{Cachable, Common}
-  alias Mobilizon.Service.Formatter.{HTML, Text}
+  alias Mobilizon.Service.Formatter.HTML
 
   @behaviour Cachable