Don't overwrite unit_circle vertices -- causes problems for many othe…

…r tests

lib/matplotlib/tests/test_artist.py

@@ -18,29 +18,29 @@
 def test_patch_transform_of_none():
     # tests the behaviour of patches added to an Axes with various transform
     # specifications
-    
+
     ax = plt.axes()
     ax.set_xlim([1, 3])
     ax.set_ylim([1, 3])
-    
+
     # Draw an ellipse over data coord (2,2) by specifying device coords.
     xy_data = (2, 2)
     xy_pix = ax.transData.transform_point(xy_data)
-    
+
     # Not providing a transform of None puts the ellipse in data coordinates .
     e = mpatches.Ellipse(xy_data, width=1, height=1, fc='yellow', alpha=0.5)
     ax.add_patch(e)
     assert e._transform == ax.transData
-    
+
     # Providing a transform of None puts the ellipse in device coordinates.
-    e = mpatches.Ellipse(xy_pix, width=120, height=120, fc='coral', 
+    e = mpatches.Ellipse(xy_pix, width=120, height=120, fc='coral',
                          transform=None, alpha=0.5)
     assert e.is_transform_set() is True
     ax.add_patch(e)
     assert isinstance(e._transform, mtrans.IdentityTransform)
-    
+
     # Providing an IdentityTransform puts the ellipse in device coordinates.
-    e = mpatches.Ellipse(xy_pix, width=100, height=100, 
+    e = mpatches.Ellipse(xy_pix, width=100, height=100,
                          transform=mtrans.IdentityTransform(), alpha=0.5)
     ax.add_patch(e)
     assert isinstance(e._transform, mtrans.IdentityTransform)
@@ -55,39 +55,39 @@ def test_patch_transform_of_none():
     assert e.get_transform() != intermediate_transform
     assert e.is_transform_set() is True
     assert e._transform == ax.transData
-    
+
 
 @cleanup
 def test_collection_transform_of_none():
-    # tests the behaviour of collections added to an Axes with various 
+    # tests the behaviour of collections added to an Axes with various
     # transform specifications
 
     ax = plt.axes()
     ax.set_xlim([1, 3])
     ax.set_ylim([1, 3])
-    
+
     #draw an ellipse over data coord (2,2) by specifying device coords
     xy_data = (2, 2)
     xy_pix = ax.transData.transform_point(xy_data)
-    
-    # not providing a transform of None puts the ellipse in data coordinates 
+
+    # not providing a transform of None puts the ellipse in data coordinates
     e = mpatches.Ellipse(xy_data, width=1, height=1)
     c = mcollections.PatchCollection([e], facecolor='yellow', alpha=0.5)
     ax.add_collection(c)
-    # the collection should be in data coordinates 
+    # the collection should be in data coordinates
     assert c.get_offset_transform() + c.get_transform() == ax.transData
-    
+
     # providing a transform of None puts the ellipse in device coordinates
     e = mpatches.Ellipse(xy_pix, width=120, height=120)
-    c = mcollections.PatchCollection([e], facecolor='coral', 
+    c = mcollections.PatchCollection([e], facecolor='coral',
                                      alpha=0.5)
-    c.set_transform(None)                          
+    c.set_transform(None)
     ax.add_collection(c)
     assert isinstance(c.get_transform(), mtrans.IdentityTransform)
-    
+
     # providing an IdentityTransform puts the ellipse in device coordinates
     e = mpatches.Ellipse(xy_pix, width=100, height=100)
-    c = mcollections.PatchCollection([e], transform=mtrans.IdentityTransform(), 
+    c = mcollections.PatchCollection([e], transform=mtrans.IdentityTransform(),
                                      alpha=0.5)
     ax.add_collection(c)
     assert isinstance(c._transOffset, mtrans.IdentityTransform)
@@ -100,7 +100,7 @@ def test_point_in_path():
     path = mpath.Path(verts2, closed=True)
     points = [(0.5,0.5), (1.5,0.5)]
 
-    assert np.all(path.contains_points(points) == [True, False]) 
+    assert np.all(path.contains_points(points) == [True, False])
 
 
 @image_comparison(baseline_images=["clip_path_clipping"], remove_text=True)
@@ -111,6 +111,8 @@ def test_clipping():
     exterior.vertices *= 4
     exterior.vertices -= 2
     interior = mpath.Path.unit_circle()
+    interior = mpath.Path(copy.deepcopy(interior.vertices),
+                          copy.deepcopy(interior.codes[:]))
     interior.vertices = interior.vertices[::-1]
     clip_path = mpath.Path(vertices=np.concatenate([exterior.vertices,
                                                     interior.vertices]),
@@ -125,7 +127,7 @@ def test_clipping():
                                       facecolor='red', alpha=0.7, hatch='*')
     col.set_clip_path(clip_path, ax1.transData)
     ax1.add_collection(col)
-    
+
     ax2 = plt.subplot(122, sharex=ax1, sharey=ax1)
     patch = mpatches.PathPatch(star, lw=5, edgecolor='blue', facecolor='red',
                                alpha=0.7, hatch='*')