pass copy kwarg

Author: jbrockmendel

pandas/core/arrays/datetimelike.py

@@ -431,7 +431,7 @@ def astype(self, dtype, copy=True):
         elif is_categorical_dtype(dtype):
             return Categorical(self, dtype=dtype)
         else:
-            return np.asarray(self, dtype=dtype)
+            return np.asarray(self, dtype=dtype, copy=copy)
 
     def view(self, dtype=None):
         """

pandas/tests/arrays/test_period.py

@@ -109,6 +109,7 @@ def test_astype_copies():
 
     result = arr.astype(np.int64, copy=True)
     assert result is not arr._data
+    tm.assert_numpy_array_equal(result, arr._data.view('i8'))
 
 
 def test_astype_categorical():