Implement announcement read relationships

test/pleroma/announcement_read_relationship_test.exs

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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.AnnouncementReadRelationshipTest do
+  alias Pleroma.AnnouncementReadRelationship
+
+  use Pleroma.DataCase, async: true
+
+  import Pleroma.Factory
+
+  setup do
+    {:ok, user: insert(:user), announcement: insert(:announcement)}
+  end
+
+  describe "mark_read/2" do
+    test "should insert relationship", %{user: user, announcement: announcement} do
+      {:ok, _} = AnnouncementReadRelationship.mark_read(user, announcement)
+
+      assert AnnouncementReadRelationship.exists?(user, announcement)
+    end
+  end
+
+  describe "mark_unread/2" do
+    test "should delete relationship", %{user: user, announcement: announcement} do
+      {:ok, _} = AnnouncementReadRelationship.mark_read(user, announcement)
+
+      assert :ok = AnnouncementReadRelationship.mark_unread(user, announcement)
+      refute AnnouncementReadRelationship.exists?(user, announcement)
+    end
+
+    test "should not fail if relationship does not exist", %{
+      user: user,
+      announcement: announcement
+    } do
+      assert :ok = AnnouncementReadRelationship.mark_unread(user, announcement)
+      refute AnnouncementReadRelationship.exists?(user, announcement)
+    end
+  end
+end