Add test to close legend issue

oscargus · oscargus · commit db8894443bf4 · 2022-05-09T19:28:54.000+02:00
diff --git a/lib/matplotlib/tests/test_legend.py b/lib/matplotlib/tests/test_legend.py
@@ -5,7 +5,7 @@
 import numpy as np
 import pytest
 
-from matplotlib.testing.decorators import image_comparison
+from matplotlib.testing.decorators import check_figures_equal, image_comparison
 import matplotlib.pyplot as plt
 import matplotlib as mpl
 import matplotlib.transforms as mtransforms
@@ -910,3 +910,17 @@ def test_setting_alpha_keeps_polycollection_color():
     patch.set_alpha(0.5)
     assert patch.get_facecolor()[:3] == tuple(pc.get_facecolor()[0][:3])
     assert patch.get_edgecolor()[:3] == tuple(pc.get_edgecolor()[0][:3])
+
+
+@check_figures_equal(extensions=["png"])
+def test_legend_markers_from_Line2d(fig_test, fig_ref):
+    # Test that markers can be copied for legend lines (#17960)
+    lines = [mlines.Line2D([0], [0], ls='None', marker='.') for i in range(2)]
+    labels = [1, 2]
+
+    legend = fig_ref.gca().legend(lines,labels)
+
+    new_lines = legend.get_lines()
+    new_labels = [text.get_text() for text in legend.get_texts()]
+
+    fig_test.gca().legend(new_lines, new_labels)
