MAINT: sync test_ufunc.py with main for PR #63088

Author: antznette1

pandas/tests/series/test_ufunc.py

@@ -9,15 +9,6 @@
 import pandas._testing as tm
 from pandas.arrays import SparseArray
 
-# Probe whether np.fix works with Series without raising due to read-only out
-# This avoids relying solely on is_numpy_dev, which may not reflect CI pinning.
-try:
-    _ser = pd.Series([-1.5, -0.5])
-    _probe_result = np.fix(_ser)
-    _NP_FIX_WORKS = True
-except Exception:  # pragma: no cover - best-effort environment probe
-    _NP_FIX_WORKS = False
-
 
 @pytest.fixture(params=[np.add, np.logaddexp])
 def ufunc(request):
@@ -247,12 +238,6 @@ def __init__(self, value) -> None:
         def __add__(self, other):
             return self.value + other.value
 
-        def __eq__(self, other) -> bool:
-            return type(other) is Dummy and self.value == other.value
-
-        def __repr__(self) -> str:
-            return f"Dummy({self.value})"
-
     arr = np.array([Dummy(0), Dummy(1)])
     ser = pd.Series(arr)
     tm.assert_series_equal(np.add(ser, ser), pd.Series(np.add(ser, arr)))
@@ -472,15 +457,12 @@ def add3(x, y, z):
         ufunc(ser, ser, df)
 
 
-@pytest.mark.xfail(
-    condition=not _NP_FIX_WORKS,
-    reason="see https://github.com/pandas-dev/pandas/pull/51082",
-    strict=True,
-)
-def test_np_fix():
-    # np.fix is not a ufunc but is composed of several ufunc calls under the hood
-    # with `out` and `where` keywords
+def test_np_trunc():
+    # This used to test np.fix, which is not a ufunc but is composed of
+    # several ufunc calls under the hood with `out` and `where` keywords. But numpy
+    # is deprecating that (or at least discussing deprecating) in favor of np.trunc,
+    # which _is_ a ufunc without the out keyword usage.
     ser = pd.Series([-1.5, -0.5, 0.5, 1.5])
-    result = np.fix(ser)
+    result = np.trunc(ser)
     expected = pd.Series([-1.0, -0.0, 0.0, 1.0])
     tm.assert_series_equal(result, expected)