unary_operator_1_minus_Int(-5) == 5
unary_operator_1_minus_Int(5) == -5
unary_operator_1_plus_Int(-5) == -5
unary_operator_1_plus_Int(5) == 5
unary_operator_1_not_Boolean(1) == 0
unary_operator_1_not_Boolean(0) == 1
