test(test_map.py): copy fixtures to avoid any effects from modificati…

…on over successive tests

sfrmaker/test/test_map.py

@@ -14,7 +14,7 @@ def name_path():
 
 
 @pytest.fixture(scope="module")
-def lines(test_data_path, name_path):
+def get_lines(test_data_path, name_path):
     name, path = name_path
     lns = sfrmaker.Lines.from_shapefile(
         test_data_path / f'{path}/flowlines.shp'.format(test_data_path, path),
@@ -31,12 +31,19 @@ def lines(test_data_path, name_path):
     return lns
 
 
+@pytest.fixture(scope='function')
+def lines(get_lines):
+    return copy.deepcopy(get_lines)
+
 @pytest.fixture(scope="module")
-def grid(test_data_path, name_path):
+def get_grid(test_data_path, name_path):
     name, path = name_path
     grd = sfrmaker.StructuredGrid.from_json('{0}/{1}/{1}/{1}_grid.json'.format(test_data_path, path))
     return grd
 
+@pytest.fixture(scope='function')
+def grid(get_grid):
+    return copy.deepcopy(get_grid)
 
 @pytest.fixture(scope="module")
 def sfr(lines, grid):