ENH: test to ensure tooltip class ignored if set_tooltips not called.

Author: attack68

pandas/tests/io/formats/test_style.py

@@ -1702,15 +1702,23 @@ def test_tooltip_render(self):
         assert "#T__ .pd-t {" in s.render()
         # test 'min' tooltip added
         assert (
-            '#T__ #T__row0_col0:hover .pd-t {\n          visibility: visible;\n    }    #T__ #T__row0_col0 .pd-t::after {\n          content: "Min";\n    }'
+            "#T__ #T__row0_col0:hover .pd-t {\n          visibility: visible;\n    }    "
+            + '#T__ #T__row0_col0 .pd-t::after {\n          content: "Min";\n    }'
             in s.render()
         )
         # test 'max' tooltip added
         assert (
-            '#T__ #T__row1_col1:hover .pd-t {\n          visibility: visible;\n    }    #T__ #T__row1_col1 .pd-t::after {\n          content: "Max";\n    }'
+            "#T__ #T__row1_col1:hover .pd-t {\n          visibility: visible;\n    }    "
+            + '#T__ #T__row1_col1 .pd-t::after {\n          content: "Max";\n    }'
             in s.render()
         )
 
+    def test_tooltip_ignored(self):
+        # GH XXXXX
+        df = pd.DataFrame(data=[[0, 1], [2, 3]])
+        s = Styler(df, uuid="_")  # no set_tooltips()
+        assert '<style  type="text/css" >\n</style>' in s.render()
+
 
 @td.skip_if_no_mpl
 class TestStylerMatplotlibDep: