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[NOMERGE] Test object array copying #42474

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[NOMERGE] Test object array copying #42474

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10 changes: 10 additions & 0 deletions pandas/tests/frame/test_constructors.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2868,3 +2868,13 @@ def test_tzaware_data_tznaive_dtype(self, constructor):

assert np.all(result.dtypes == "M8[ns]")
assert np.all(result == ts_naive)

def test_1d_object_array_does_not_copy(self):
a = np.array(["a", "b"], dtype="object")
df = DataFrame(a, copy=False)
assert np.shares_memory(df.values, a)

def test_2d_object_array_does_not_copy(self):
b = np.array([["a", "b"], ["c", "d"]], dtype="object")
df2 = DataFrame(b, copy=False)
assert np.shares_memory(df2.values, b)