done

lib/python3.11/site-packages/pandas/tests/arrays/timedeltas/test_constructors.py

@@ -0,0 +1,103 @@
+import numpy as np
+import pytest
+
+import pandas._testing as tm
+from pandas.core.arrays import TimedeltaArray
+
+
+class TestTimedeltaArrayConstructor:
+    def test_only_1dim_accepted(self):
+        # GH#25282
+        arr = np.array([0, 1, 2, 3], dtype="m8[h]").astype("m8[ns]")
+
+        depr_msg = "TimedeltaArray.__init__ is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=depr_msg):
+            with pytest.raises(ValueError, match="Only 1-dimensional"):
+                # 3-dim, we allow 2D to sneak in for ops purposes GH#29853
+                TimedeltaArray(arr.reshape(2, 2, 1))
+
+        with tm.assert_produces_warning(FutureWarning, match=depr_msg):
+            with pytest.raises(ValueError, match="Only 1-dimensional"):
+                # 0-dim
+                TimedeltaArray(arr[[0]].squeeze())
+
+    def test_freq_validation(self):
+        # ensure that the public constructor cannot create an invalid instance
+        arr = np.array([0, 0, 1], dtype=np.int64) * 3600 * 10**9
+
+        msg = (
+            "Inferred frequency None from passed values does not "
+            "conform to passed frequency D"
+        )
+        depr_msg = "TimedeltaArray.__init__ is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=depr_msg):
+            with pytest.raises(ValueError, match=msg):
+                TimedeltaArray(arr.view("timedelta64[ns]"), freq="D")
+
+    def test_non_array_raises(self):
+        depr_msg = "TimedeltaArray.__init__ is deprecated"
+        with tm.assert_produces_warning(FutureWarning, match=depr_msg):
+            with pytest.raises(ValueError, match="list"):
+                TimedeltaArray([1, 2, 3])
+
+    def test_other_type_raises(self):
+        msg = r"dtype bool cannot be converted to timedelta64\[ns\]"
+        with pytest.raises(TypeError, match=msg):
+            TimedeltaArray._from_sequence(np.array([1, 2, 3], dtype="bool"))
+
+    def test_incorrect_dtype_raises(self):
+        msg = "dtype 'category' is invalid, should be np.timedelta64 dtype"
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence(
+                np.array([1, 2, 3], dtype="i8"), dtype="category"
+            )
+
+        msg = "dtype 'int64' is invalid, should be np.timedelta64 dtype"
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence(
+                np.array([1, 2, 3], dtype="i8"), dtype=np.dtype("int64")
+            )
+
+        msg = r"dtype 'datetime64\[ns\]' is invalid, should be np.timedelta64 dtype"
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence(
+                np.array([1, 2, 3], dtype="i8"), dtype=np.dtype("M8[ns]")
+            )
+
+        msg = (
+            r"dtype 'datetime64\[us, UTC\]' is invalid, should be np.timedelta64 dtype"
+        )
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence(
+                np.array([1, 2, 3], dtype="i8"), dtype="M8[us, UTC]"
+            )
+
+        msg = "Supported timedelta64 resolutions are 's', 'ms', 'us', 'ns'"
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence(
+                np.array([1, 2, 3], dtype="i8"), dtype=np.dtype("m8[Y]")
+            )
+
+    def test_mismatched_values_dtype_units(self):
+        arr = np.array([1, 2, 3], dtype="m8[s]")
+        dtype = np.dtype("m8[ns]")
+        msg = r"Values resolution does not match dtype"
+        depr_msg = "TimedeltaArray.__init__ is deprecated"
+
+        with tm.assert_produces_warning(FutureWarning, match=depr_msg):
+            with pytest.raises(ValueError, match=msg):
+                TimedeltaArray(arr, dtype=dtype)
+
+    def test_copy(self):
+        data = np.array([1, 2, 3], dtype="m8[ns]")
+        arr = TimedeltaArray._from_sequence(data, copy=False)
+        assert arr._ndarray is data
+
+        arr = TimedeltaArray._from_sequence(data, copy=True)
+        assert arr._ndarray is not data
+        assert arr._ndarray.base is not data
+
+    def test_from_sequence_dtype(self):
+        msg = "dtype 'object' is invalid, should be np.timedelta64 dtype"
+        with pytest.raises(ValueError, match=msg):
+            TimedeltaArray._from_sequence([], dtype=object)

lib/python3.11/site-packages/pandas/tests/arrays/timedeltas/test_cumulative.py

@@ -0,0 +1,20 @@
+import pytest
+
+import pandas._testing as tm
+from pandas.core.arrays import TimedeltaArray
+
+
+class TestAccumulator:
+    def test_accumulators_disallowed(self):
+        # GH#50297
+        arr = TimedeltaArray._from_sequence(["1D", "2D"], dtype="m8[ns]")
+        with pytest.raises(TypeError, match="cumprod not supported"):
+            arr._accumulate("cumprod")
+
+    def test_cumsum(self, unit):
+        # GH#50297
+        dtype = f"m8[{unit}]"
+        arr = TimedeltaArray._from_sequence(["1D", "2D"], dtype=dtype)
+        result = arr._accumulate("cumsum")
+        expected = TimedeltaArray._from_sequence(["1D", "3D"], dtype=dtype)
+        tm.assert_timedelta_array_equal(result, expected)

lib/python3.11/site-packages/pandas/tests/arrays/timedeltas/test_reductions.py

@@ -0,0 +1,218 @@
+import numpy as np
+import pytest
+
+import pandas as pd
+from pandas import Timedelta
+import pandas._testing as tm
+from pandas.core import nanops
+from pandas.core.arrays import TimedeltaArray
+
+
+class TestReductions:
+    @pytest.mark.parametrize("name", ["std", "min", "max", "median", "mean"])
+    @pytest.mark.parametrize("skipna", [True, False])
+    def test_reductions_empty(self, name, skipna):
+        tdi = pd.TimedeltaIndex([])
+        arr = tdi.array
+
+        result = getattr(tdi, name)(skipna=skipna)
+        assert result is pd.NaT
+
+        result = getattr(arr, name)(skipna=skipna)
+        assert result is pd.NaT
+
+    @pytest.mark.parametrize("skipna", [True, False])
+    def test_sum_empty(self, skipna):
+        tdi = pd.TimedeltaIndex([])
+        arr = tdi.array
+
+        result = tdi.sum(skipna=skipna)
+        assert isinstance(result, Timedelta)
+        assert result == Timedelta(0)
+
+        result = arr.sum(skipna=skipna)
+        assert isinstance(result, Timedelta)
+        assert result == Timedelta(0)
+
+    def test_min_max(self, unit):
+        dtype = f"m8[{unit}]"
+        arr = TimedeltaArray._from_sequence(
+            ["3h", "3h", "NaT", "2h", "5h", "4h"], dtype=dtype
+        )
+
+        result = arr.min()
+        expected = Timedelta("2h")
+        assert result == expected
+
+        result = arr.max()
+        expected = Timedelta("5h")
+        assert result == expected
+
+        result = arr.min(skipna=False)
+        assert result is pd.NaT
+
+        result = arr.max(skipna=False)
+        assert result is pd.NaT
+
+    def test_sum(self):
+        tdi = pd.TimedeltaIndex(["3h", "3h", "NaT", "2h", "5h", "4h"])
+        arr = tdi.array
+
+        result = arr.sum(skipna=True)
+        expected = Timedelta(hours=17)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = tdi.sum(skipna=True)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = arr.sum(skipna=False)
+        assert result is pd.NaT
+
+        result = tdi.sum(skipna=False)
+        assert result is pd.NaT
+
+        result = arr.sum(min_count=9)
+        assert result is pd.NaT
+
+        result = tdi.sum(min_count=9)
+        assert result is pd.NaT
+
+        result = arr.sum(min_count=1)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = tdi.sum(min_count=1)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+    def test_npsum(self):
+        # GH#25282, GH#25335 np.sum should return a Timedelta, not timedelta64
+        tdi = pd.TimedeltaIndex(["3h", "3h", "2h", "5h", "4h"])
+        arr = tdi.array
+
+        result = np.sum(tdi)
+        expected = Timedelta(hours=17)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = np.sum(arr)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+    def test_sum_2d_skipna_false(self):
+        arr = np.arange(8).astype(np.int64).view("m8[s]").astype("m8[ns]").reshape(4, 2)
+        arr[-1, -1] = "Nat"
+
+        tda = TimedeltaArray._from_sequence(arr)
+
+        result = tda.sum(skipna=False)
+        assert result is pd.NaT
+
+        result = tda.sum(axis=0, skipna=False)
+        expected = pd.TimedeltaIndex([Timedelta(seconds=12), pd.NaT])._values
+        tm.assert_timedelta_array_equal(result, expected)
+
+        result = tda.sum(axis=1, skipna=False)
+        expected = pd.TimedeltaIndex(
+            [
+                Timedelta(seconds=1),
+                Timedelta(seconds=5),
+                Timedelta(seconds=9),
+                pd.NaT,
+            ]
+        )._values
+        tm.assert_timedelta_array_equal(result, expected)
+
+    # Adding a Timestamp makes this a test for DatetimeArray.std
+    @pytest.mark.parametrize(
+        "add",
+        [
+            Timedelta(0),
+            pd.Timestamp("2021-01-01"),
+            pd.Timestamp("2021-01-01", tz="UTC"),
+            pd.Timestamp("2021-01-01", tz="Asia/Tokyo"),
+        ],
+    )
+    def test_std(self, add):
+        tdi = pd.TimedeltaIndex(["0h", "4h", "NaT", "4h", "0h", "2h"]) + add
+        arr = tdi.array
+
+        result = arr.std(skipna=True)
+        expected = Timedelta(hours=2)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = tdi.std(skipna=True)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        if getattr(arr, "tz", None) is None:
+            result = nanops.nanstd(np.asarray(arr), skipna=True)
+            assert isinstance(result, np.timedelta64)
+            assert result == expected
+
+        result = arr.std(skipna=False)
+        assert result is pd.NaT
+
+        result = tdi.std(skipna=False)
+        assert result is pd.NaT
+
+        if getattr(arr, "tz", None) is None:
+            result = nanops.nanstd(np.asarray(arr), skipna=False)
+            assert isinstance(result, np.timedelta64)
+            assert np.isnat(result)
+
+    def test_median(self):
+        tdi = pd.TimedeltaIndex(["0h", "3h", "NaT", "5h06m", "0h", "2h"])
+        arr = tdi.array
+
+        result = arr.median(skipna=True)
+        expected = Timedelta(hours=2)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = tdi.median(skipna=True)
+        assert isinstance(result, Timedelta)
+        assert result == expected
+
+        result = arr.median(skipna=False)
+        assert result is pd.NaT
+
+        result = tdi.median(skipna=False)
+        assert result is pd.NaT
+
+    def test_mean(self):
+        tdi = pd.TimedeltaIndex(["0h", "3h", "NaT", "5h06m", "0h", "2h"])
+        arr = tdi._data
+
+        # manually verified result
+        expected = Timedelta(arr.dropna()._ndarray.mean())
+
+        result = arr.mean()
+        assert result == expected
+        result = arr.mean(skipna=False)
+        assert result is pd.NaT
+
+        result = arr.dropna().mean(skipna=False)
+        assert result == expected
+
+        result = arr.mean(axis=0)
+        assert result == expected
+
+    def test_mean_2d(self):
+        tdi = pd.timedelta_range("14 days", periods=6)
+        tda = tdi._data.reshape(3, 2)
+
+        result = tda.mean(axis=0)
+        expected = tda[1]
+        tm.assert_timedelta_array_equal(result, expected)
+
+        result = tda.mean(axis=1)
+        expected = tda[:, 0] + Timedelta(hours=12)
+        tm.assert_timedelta_array_equal(result, expected)
+
+        result = tda.mean(axis=None)
+        expected = tdi.mean()
+        assert result == expected