Method test_f_signed_int_big_jump

numpy/lib/tests/test_function_base.py:1195–1200

(self, f_dtype)

    @pytest.mark.parametrize('f_dtype', [np.int8, np.int16,
                                         np.int32, np.int64])
    def test_f_signed_int_big_jump(self, f_dtype):
        maxint = np.iinfo(f_dtype).max
        x = np.array([1, 3])
        f = np.array([-1, maxint], dtype=f_dtype)
        dfdx = gradient(f, x)
        assert_array_equal(dfdx, [(maxint + 1) // 2]*2)

    @pytest.mark.parametrize('x_dtype', [np.uint8, np.uint16,
                                         np.uint32, np.uint64])