widgets: test _Buttons' callbacks

doronbehar · doronbehar · commit 8ea8f69deed0 · 2026-01-29T12:41:42.000+02:00
diff --git a/lib/matplotlib/tests/test_widgets.py b/lib/matplotlib/tests/test_widgets.py
@@ -1219,6 +1219,25 @@ def test_check_button_props(fig_test, fig_ref):
     cb.set_check_props({**check_props, 's': (24 / 2)**2})
 
 
+@pytest.mark.parametrize("widget", [widgets.RadioButtons, widgets.CheckButtons])
+def test__buttons_callbacks(ax, widget):
+    """Tests what https://github.com/matplotlib/matplotlib/pull/31031 fixed"""
+    on_clicked = mock.Mock(spec=noop, return_value=None)
+    button = widget(ax, ["Test Button"])
+    button.on_clicked(on_clicked)
+    MouseEvent._from_ax_coords(
+        "button_press_event",
+        ax,
+        ax.transData.inverted().transform(ax.transAxes.transform(
+            # (x, y) of the 0th button defined at
+            # `{Check,Radio}Buttons._init_props`
+            (0.15, 0.5),
+        )),
+        1,
+    )._process()
+    on_clicked.assert_called_once()
+
+
 def test_slider_slidermin_slidermax_invalid():
     fig, ax = plt.subplots()
     # test min/max with floats
