Add test_annotation_patchA_not_overridden function

dikshajangra12918-oss · web-flow · commit aa4f232d7869 · 2026-04-05T12:32:11.000+05:30
Add test to verify that manually set patchA on  annotation arrow is preserved after draw.
diff --git a/lib/matplotlib/tests/test_text.py b/lib/matplotlib/tests/test_text.py
@@ -1236,3 +1236,16 @@ def test_text_tightbbox_outside_scale_domain():
     invalid_text = ax.text(0, -5, 'invalid')
     invalid_bbox = invalid_text.get_tightbbox(fig.canvas.get_renderer())
     assert not np.isfinite(invalid_bbox.width)
+def test_annotation_patchA_not_overridden():
+    # Test that manually setting patchA on annotation arrow is not overridden by update_positions. See GitHub issue #28316.
+    fig, ax = plt.subplots()
+    ann = ax.annotate(
+        '',
+        xy=(0.5, 0.6),
+        xytext=(0.2, 0.5),
+        arrowprops=dict(arrowstyle="->")
+    )
+    text = ax.text(0.2, 0.5, 'Text', ha='center', va='center')
+    ann.arrow_patch.set_patchA(text)
+    fig.draw_without_rendering()
+    assert ann.arrow_patch.patchA is text
