[Stats] Fix creating test artifacts in tmp not pwd

deluge/plugins/Stats/deluge_stats/gtkui.py

@@ -9,9 +9,11 @@
 # This file is part of Deluge and is licensed under GNU General Public License 3.0, or later, with
 # the additional special exception to link portions of this program with the OpenSSL library.
 # See LICENSE for more details.
-#
 
 import logging
+import gi  # isort:skip (Required before Gtk import).
+
+gi.require_version('Gtk', '3.0')
 
 from gi.repository import Gtk
 from gi.repository.Gdk import RGBA

deluge/plugins/Stats/deluge_stats/tests/test_stats.py

@@ -58,7 +58,7 @@ class TestStatsPlugin:
 
     @pytest.mark.gtkui
     @defer.inlineCallbacks
-    def test_write(self):
+    def test_write(self, tmp_path):
         """
         writing to a file-like object; need this for webui.
 
@@ -102,5 +102,5 @@ class TestStatsPlugin:
         file_like = FakeFile()
         surface.write_to_png(file_like)
         data = b''.join(file_like.data)
-        with open('file_like.png', 'wb') as _file:
+        with open(tmp_path / 'file_like.png', 'wb') as _file:
             _file.write(data)