TST: Move datetime specific test from common tests (pandas-dev#28801)

Author: jschendel

pandas/tests/indexes/common.py

@@ -96,14 +96,6 @@ def test_to_frame(self, name):
         df = idx.to_frame(index=False, name=idx_name)
         assert df.index is not idx
 
-    def test_to_frame_datetime_tz(self):
-        # GH 25809
-        idx = pd.date_range(start="2019-01-01", end="2019-01-30", freq="D")
-        idx = idx.tz_localize("UTC")
-        result = idx.to_frame()
-        expected = pd.DataFrame(idx, index=idx)
-        tm.assert_frame_equal(result, expected)
-
     def test_shift(self):
 
         # GH8083 test the base class for shift

pandas/tests/indexes/datetimes/test_datetime.py

@@ -450,3 +450,10 @@ def test_asarray_tz_aware(self):
             result = np.asarray(idx, dtype=object)
 
         tm.assert_numpy_array_equal(result, expected)
+
+    def test_to_frame_datetime_tz(self):
+        # GH 25809
+        idx = date_range(start="2019-01-01", end="2019-01-30", freq="D", tz="UTC")
+        result = idx.to_frame()
+        expected = DataFrame(idx, index=idx)
+        tm.assert_frame_equal(result, expected)