TST: add index type coverage to timedelta subtraction tests (#31793)

Author: AnjoMan

pandas/tests/arithmetic/test_timedelta64.py

@@ -357,13 +357,15 @@ def test_subtraction_ops(self):
         expected = DatetimeIndex(["20121231", NaT, "20121230"], name="foo")
         tm.assert_index_equal(result, expected)
 
-    def test_subtraction_ops_with_tz(self):
+    def test_subtraction_ops_with_tz(self, box_with_array):
 
         # check that dt/dti subtraction ops with tz are validated
         dti = pd.date_range("20130101", periods=3)
+        dti = tm.box_expected(dti, box_with_array)
         ts = Timestamp("20130101")
         dt = ts.to_pydatetime()
         dti_tz = pd.date_range("20130101", periods=3).tz_localize("US/Eastern")
+        dti_tz = tm.box_expected(dti_tz, box_with_array)
         ts_tz = Timestamp("20130101").tz_localize("US/Eastern")
         ts_tz2 = Timestamp("20130101").tz_localize("CET")
         dt_tz = ts_tz.to_pydatetime()
@@ -413,27 +415,32 @@ def _check(result, expected):
 
         result = dti_tz - dt_tz
         expected = TimedeltaIndex(["0 days", "1 days", "2 days"])
-        tm.assert_index_equal(result, expected)
+        expected = tm.box_expected(expected, box_with_array)
+        tm.assert_equal(result, expected)
 
         result = dt_tz - dti_tz
         expected = TimedeltaIndex(["0 days", "-1 days", "-2 days"])
-        tm.assert_index_equal(result, expected)
+        expected = tm.box_expected(expected, box_with_array)
+        tm.assert_equal(result, expected)
 
         result = dti_tz - ts_tz
         expected = TimedeltaIndex(["0 days", "1 days", "2 days"])
-        tm.assert_index_equal(result, expected)
+        expected = tm.box_expected(expected, box_with_array)
+        tm.assert_equal(result, expected)
 
         result = ts_tz - dti_tz
         expected = TimedeltaIndex(["0 days", "-1 days", "-2 days"])
-        tm.assert_index_equal(result, expected)
+        expected = tm.box_expected(expected, box_with_array)
+        tm.assert_equal(result, expected)
 
         result = td - td
         expected = Timedelta("0 days")
         _check(result, expected)
 
         result = dti_tz - td
         expected = DatetimeIndex(["20121231", "20130101", "20130102"], tz="US/Eastern")
-        tm.assert_index_equal(result, expected)
+        expected = tm.box_expected(expected, box_with_array)
+        tm.assert_equal(result, expected)
 
     def test_dti_tdi_numeric_ops(self):
         # These are normally union/diff set-like ops