From ef7be0a1e513841beba15ccce6b6211b7369332a Mon Sep 17 00:00:00 2001
From: Phantasm <phantasm@centrum.cz>
Date: Wed, 15 Oct 2025 23:14:52 +0200
Subject: [PATCH] DB prune: Add test for hashtags

---
 test/mix/tasks/pleroma/database_test.exs | 34 ++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/test/mix/tasks/pleroma/database_test.exs b/test/mix/tasks/pleroma/database_test.exs
index 19df17b60..5b567325c 100644
--- a/test/mix/tasks/pleroma/database_test.exs
+++ b/test/mix/tasks/pleroma/database_test.exs
@@ -8,6 +8,7 @@ defmodule Mix.Tasks.Pleroma.DatabaseTest do
 
   alias Pleroma.Activity
   alias Pleroma.Bookmark
+  alias Pleroma.Hashtag
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
@@ -550,6 +551,39 @@ defmodule Mix.Tasks.Pleroma.DatabaseTest do
 
       assert length(activities) == 3
     end
+
+    test "it prunes hashtags with no objects associated", %{old_insert_date: old_insert_date} do
+      user = insert(:user)
+
+      {:ok, hashtag_post_activity} =
+        CommonAPI.post(user, %{status: "morning #cofe", local: true})
+
+      hashtag_post_object = Object.normalize(hashtag_post_activity)
+
+      {:ok, hashtag_post2_activity} =
+        CommonAPI.post(user, %{status: "morning #cawfee", local: true})
+
+      hashtag_post2_object = Object.normalize(hashtag_post2_activity)
+
+      hashtag_post_object
+      |> Ecto.Changeset.change(%{updated_at: old_insert_date})
+      |> Repo.update!()
+
+      hashtag_post2_object
+      |> Ecto.Changeset.change(%{updated_at: old_insert_date})
+      |> Repo.update!()
+
+      # Test whether hashtags with follow relationships are kept
+      User.follow_hashtag(user, Hashtag.get_by_name("cofe"))
+
+      assert length(Repo.all(Hashtag)) == 2
+      assert length(Repo.all(Object)) == 2
+
+      Mix.Tasks.Pleroma.Database.run(["prune_objects"])
+      assert length(Repo.all(Hashtag)) == 1
+      assert length(Repo.all(Object)) == 0
+      assert Repo.one(Hashtag) |> Map.fetch!(:name) == "cofe"
+    end
   end
 
   describe "running update_users_following_followers_counts" do