BUG: Unary pos/neg ops on IntegerArrays failing with TypeError

pandas/core/arrays/boolean.py

@@ -736,6 +736,9 @@ def boolean_arithmetic_method(self, other):
         name = f"__{op_name}__"
         return set_function_name(boolean_arithmetic_method, name, cls)
 
+    def __neg__(self):
+        return self.__invert__()
+
 
 BooleanArray._add_logical_ops()
 BooleanArray._add_comparison_ops()

pandas/core/arrays/masked.py

@@ -125,6 +125,12 @@ def __len__(self) -> int:
     def __invert__(self: BaseMaskedArrayT) -> BaseMaskedArrayT:
         return type(self)(~self._data, self._mask)
 
+    def __neg__(self: BaseMaskedArrayT) -> BaseMaskedArrayT:
+        return type(self)(-self._data, self._mask)
+
+    def __pos__(self: BaseMaskedArrayT) -> BaseMaskedArrayT:
+        return type(self)(+self._data, self._mask)
+
     def to_numpy(
         self, dtype=None, copy: bool = False, na_value: Scalar = lib.no_default
     ) -> np.ndarray:

pandas/tests/extension/base/ops.py

@@ -186,3 +186,15 @@ def test_invert(self, data):
         result = ~s
         expected = pd.Series(~data, name="name")
         self.assert_series_equal(result, expected)
+
+    def test_neg(self, data):
+        s = pd.Series(data, name="name")
+        result = -s
+        expected = pd.Series(-data, name="name")
+        self.assert_series_equal(result, expected)
+
+    def test_pos(self, data):
+        s = pd.Series(data, name="name")
+        result = +s
+        expected = pd.Series(+data, name="name")
+        self.assert_series_equal(result, expected)

pandas/tests/extension/test_integer.py

@@ -181,6 +181,10 @@ def _compare_other(self, s, data, op_name, other):
         self.check_opname(s, op_name, other)
 
 
+class TestUnaryOps(base.BaseUnaryOpsTests):
+    pass
+
+
 class TestInterface(base.BaseInterfaceTests):
     pass