Add test

dstansby · dstansby · commit 77b85ad2bd05 · 2021-10-08T19:11:05.000+01:00
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -23,6 +23,7 @@
 import matplotlib.font_manager as mfont_manager
 import matplotlib.markers as mmarkers
 import matplotlib.patches as mpatches
+import matplotlib.path as mpath
 import matplotlib.pyplot as plt
 import matplotlib.ticker as mticker
 import matplotlib.transforms as mtransforms
@@ -7271,3 +7272,24 @@ def test_clim():
         clim = (7, 8)
         norm = plot_method([[0, 1], [2, 3]], clim=clim).norm
         assert (norm.vmin, norm.vmax) == clim
+
+
+def test_bezier_autoscale():
+    # Check that bezier curves autoscale to their curves, and not their
+    # control points
+    verts = [[-1, 0],
+             [0, -1],
+             [1, 0],
+             [1, 0]]
+    codes = [mpath.Path.MOVETO,
+             mpath.Path.CURVE3,
+             mpath.Path.CURVE3,
+             mpath.Path.CLOSEPOLY]
+    p = mpath.Path(verts, codes)
+
+    fig, ax = plt.subplots()
+    ax.add_patch(mpatches.PathPatch(p))
+    ax.autoscale()
+    # Bottom ylim should be at the edge of the curve (-0.5), and not include
+    # the control point (at -1)
+    assert ax.get_ylim()[0] == -0.5
