bug fix to reading base and culled mesh paths from config file

Author: erinethomas

compass/ocean/tests/global_ocean/wave_mesh/base_mesh.py

@@ -32,7 +32,7 @@ def setup(self):
         self.opts.init_file = 'init.msh'
 
         # Set links to base mesh
-        if self.ocean_base_mesh is not None:
+        if self.ocean_base_mesh is None:
             mesh_path = self.ocean_base_mesh.steps['base_mesh'].path
             ocean_base_mesh_path = f'{mesh_path}/base_mesh.nc'
         else:
@@ -48,7 +48,7 @@ def setup(self):
             work_dir_target=ocean_base_mesh_path)
 
         # Set links to culled mesh
-        if self.ocean_culled_mesh is not None:
+        if self.ocean_culled_mesh is None:
             mesh_path = self.ocean_culled_mesh.steps['initial_state'].path
             ocean_culled_mesh_path = f'{mesh_path}/initial_state.nc'
         else: