add similar test to base extension tests

Author: jorisvandenbossche

pandas/tests/extension/base/interface.py

@@ -1,6 +1,8 @@
 import numpy as np
 import pytest
 
+from pandas.compat.numpy import np_version_gt2
+
 from pandas.core.dtypes.cast import construct_1d_object_array_from_listlike
 from pandas.core.dtypes.common import is_extension_array_dtype
 from pandas.core.dtypes.dtypes import ExtensionDtype
@@ -71,6 +73,25 @@ def test_array_interface(self, data):
             expected = construct_1d_object_array_from_listlike(list(data))
         tm.assert_numpy_array_equal(result, expected)
 
+    def test_array_interface_copy(self, data):
+        result_copy1 = np.array(data, copy=True)
+        result_copy2 = np.array(data, copy=True)
+        assert not np.may_share_memory(result_copy1, result_copy2)
+
+        if not np_version_gt2:
+            # copy=False semantics are only supported in NumPy>=2.
+            return
+
+        try:
+            result_nocopy1 = np.array(data, copy=False)
+        except ValueError:
+            # An error is always acceptable for `copy=False`
+            return
+
+        result_nocopy2 = np.array(data, copy=False)
+        # If copy=False was given and did not raise, these must share the same data
+        assert np.may_share_memory(result_nocopy1, result_nocopy2)
+
     def test_is_extension_array_dtype(self, data):
         assert is_extension_array_dtype(data)
         assert is_extension_array_dtype(data.dtype)