Merge pull request #880 from xylar/fix-isomip-plus-viz

Make a deep copy of `PatchCollection`s in ISOMIP+ test cases

Author: xylar

compass/ocean/tests/isomip_plus/viz/plot.py

@@ -794,10 +794,10 @@ def _plot_horiz_field(self, field, title, outFileName, oceanDomain=True,
             return
 
         if oceanDomain:
-            localPatches = copy.copy(self.oceanPatches)
+            localPatches = copy.deepcopy(self.oceanPatches)
             localPatches.set_array(field[self.oceanMask])
         else:
-            localPatches = copy.copy(self.cavityPatches)
+            localPatches = copy.deepcopy(self.cavityPatches)
             localPatches.set_array(field[self.cavityMask])
 
         if cmap is not None: