TST: Use correct method of clearing mock objects

QuLogic · QuLogic · commit 63207bbc8c5f · 2026-02-13T23:21:46.000+05:30
In Python 3.13.12 and 3.14.3, fixes for thread-safety of mock `call_count` meant that manually changing it no longer works [1]. Instead use the more correct `reset_mock` method. [1] python/cpython#142651 (comment)
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -669,7 +669,7 @@ def _impl_test_interactive_timers():
     assert mock.call_count > 1
 
     # Now turn it into a single shot timer and verify only one gets triggered
-    mock.call_count = 0
+    mock.reset_mock()
     timer.single_shot = True
     timer.start()
     plt.pause(pause_time)
diff --git a/lib/matplotlib/tests/test_colors.py b/lib/matplotlib/tests/test_colors.py
@@ -1646,7 +1646,7 @@ def test_norm_callback():
     assert increment.call_count == 2
 
     # We only want autoscale() calls to send out one update signal
-    increment.call_count = 0
+    increment.reset_mock()
     norm.autoscale([0, 1, 2])
     assert increment.call_count == 1
 
