Simplify synthetic event generation in interactive pan/zoom tests.

The same events can be indiscriminately sent to test panning and
zooming, and just calling _process() on the events actually tests a
bigger part of the pipeline than calling specifically
{press,drag,release}_{pan,zoom}.

Author: anntzer

lib/matplotlib/tests/test_backend_bases.py

@@ -540,18 +540,7 @@ def test_interactive_pan_zoom_events(tool, button, patch_vis, forward_nav, t_s):
                 ylim_b = init_ylim
 
         tb.zoom()
-        tb.press_zoom(start_event)
-        tb.drag_zoom(drag_event)
-        tb.release_zoom(stop_event)
-
-        assert ax_t.get_xlim() == pytest.approx(xlim_t, abs=0.15)
-        assert ax_t.get_ylim() == pytest.approx(ylim_t, abs=0.15)
-        assert ax_b.get_xlim() == pytest.approx(xlim_b, abs=0.15)
-        assert ax_b.get_ylim() == pytest.approx(ylim_b, abs=0.15)
 
-        # Check if twin-axes are properly triggered
-        assert ax_t.get_xlim() == pytest.approx(ax_t_twin.get_xlim(), abs=0.15)
-        assert ax_b.get_xlim() == pytest.approx(ax_b_twin.get_xlim(), abs=0.15)
     else:
         # Evaluate expected limits
         # (call start_pan to make sure ax._pan_start is set)
@@ -576,15 +565,16 @@ def test_interactive_pan_zoom_events(tool, button, patch_vis, forward_nav, t_s):
                 ylim_b = init_ylim
 
         tb.pan()
-        tb.press_pan(start_event)
-        tb.drag_pan(drag_event)
-        tb.release_pan(stop_event)
 
-        assert ax_t.get_xlim() == pytest.approx(xlim_t, abs=0.15)
-        assert ax_t.get_ylim() == pytest.approx(ylim_t, abs=0.15)
-        assert ax_b.get_xlim() == pytest.approx(xlim_b, abs=0.15)
-        assert ax_b.get_ylim() == pytest.approx(ylim_b, abs=0.15)
+    start_event._process()
+    drag_event._process()
+    stop_event._process()
+
+    assert ax_t.get_xlim() == pytest.approx(xlim_t, abs=0.15)
+    assert ax_t.get_ylim() == pytest.approx(ylim_t, abs=0.15)
+    assert ax_b.get_xlim() == pytest.approx(xlim_b, abs=0.15)
+    assert ax_b.get_ylim() == pytest.approx(ylim_b, abs=0.15)
 
-        # Check if twin-axes are properly triggered
-        assert ax_t.get_xlim() == pytest.approx(ax_t_twin.get_xlim(), abs=0.15)
-        assert ax_b.get_xlim() == pytest.approx(ax_b_twin.get_xlim(), abs=0.15)
+    # Check if twin-axes are properly triggered
+    assert ax_t.get_xlim() == pytest.approx(ax_t_twin.get_xlim(), abs=0.15)
+    assert ax_b.get_xlim() == pytest.approx(ax_b_twin.get_xlim(), abs=0.15)

lib/mpl_toolkits/mplot3d/tests/test_axes3d.py

@@ -2138,14 +2138,12 @@ def test_toolbar_zoom_pan(tool, button, key, expected):
     tb = NavigationToolbar2(fig.canvas)
     if tool == "zoom":
         tb.zoom()
-        tb.press_zoom(start_event)
-        tb.drag_zoom(drag_event)
-        tb.release_zoom(stop_event)
     else:
         tb.pan()
-        tb.press_pan(start_event)
-        tb.drag_pan(drag_event)
-        tb.release_pan(stop_event)
+
+    start_event._process()
+    drag_event._process()
+    stop_event._process()
 
     # Should be close, but won't be exact due to screen integer resolution
     xlim, ylim, zlim = expected