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.venv/Lib/site-packages/pandas/tests/indexes/datetimes/test_datetimelike.py

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+""" generic tests from the Datetimelike class """
+import pytest
+
+from pandas import (
+    DatetimeIndex,
+    date_range,
+)
+import pandas._testing as tm
+from pandas.tests.indexes.datetimelike import DatetimeLike
+
+
+class TestDatetimeIndex(DatetimeLike):
+    _index_cls = DatetimeIndex
+
+    @pytest.fixture
+    def simple_index(self) -> DatetimeIndex:
+        return date_range("20130101", periods=5)
+
+    @pytest.fixture(
+        params=[tm.makeDateIndex(10), date_range("20130110", periods=10, freq="-1D")],
+        ids=["index_inc", "index_dec"],
+    )
+    def index(self, request):
+        return request.param
+
+    def test_format(self, simple_index):
+        # GH35439
+        idx = simple_index
+        expected = [f"{x:%Y-%m-%d}" for x in idx]
+        assert idx.format() == expected
+
+    def test_shift(self):
+        pass  # handled in test_ops
+
+    def test_intersection(self):
+        pass  # handled in test_setops
+
+    def test_union(self):
+        pass  # handled in test_setops