Add lines+markers legend test

Author: robertoffmoura

plotly/matplotlylib/tests/test_renderer.py

@@ -199,3 +199,19 @@ def test_filled_path_collection_date_xaxis():
     filled = [t for t in plotly_fig.data if t.fill == "toself"]
     assert len(filled) >= 1
     assert all(isinstance(x, str) for x in filled[0].x)
+
+
+def test_lines_markers_legend_plot():
+    x = [0, 1]
+    y = [0, 1]
+    label = "label"
+    plt.figure()
+    plt.plot(x, y, "o-", label=label)
+    plt.legend()
+
+    plotly_fig = tls.mpl_to_plotly(plt.gcf())
+
+    assert plotly_fig.data[0].mode == "lines+markers"
+    assert plotly_fig.data[0].x == tuple(x)
+    assert plotly_fig.data[0].y == tuple(y)
+    assert plotly_fig.data[0].name == "label"