BUG: _validate_setitem_value fails to raise for PandasArray #51044

pandas/core/arrays/numpy_.py

@@ -507,6 +507,23 @@ def to_numpy(
 
         return result
 
+    def _validate_setitem_value(self, value):
+        kind = self.dtype.kind
+        if kind == "b":
+            if lib.is_bool(value):
+                return value
+
+        elif kind == "f":
+            if lib.is_integer(value) or lib.is_float(value):
+                return value
+        else:
+            if lib.is_integer(value) or (lib.is_float(value) and value.is_integer()):
+                return value
+            if NumpyEADtype(type(value)) != self.dtype:
+                raise TypeError("bad")
+            else:
+                raise TypeError(f"Invalid value '{str(value)}' for dtype {self.dtype}")
+
     # ------------------------------------------------------------------------
     # Ops
 

pandas/tests/arrays/test_array.py

@@ -444,3 +444,11 @@ def test_array_to_numpy_na():
     result = arr.to_numpy(na_value=True, dtype=bool)
     expected = np.array([True, True])
     tm.assert_numpy_array_equal(result, expected)
+
+
+def test_array_validate_setitem_value():
+    # Issue# 51044
+    arr = pd.Series(range(5)).array
+    with pytest.raises(TypeError, match="bad"):
+        arr._validate_setitem_value("foo")
+        arr._validate_setitem_value(1.5)