Require jinja in test with df.style

Author: jnothman

pandas/tests/io/test_excel.py

@@ -2152,6 +2152,7 @@ def test_write_cells_merge_styled(self):
             self.assertEqual(xcell_a2.font, openpyxl_sty_merged)
 
     def test_styler_to_excel(self):
+        pytest.importorskip('jinja2')
         if not openpyxl_compat.is_compat(major_ver=2):
             pytest.skip('incompatible openpyxl version')