openzeppelin-contracts/contracts/test-helpers/SafeMathMock.sol

pragma solidity ^0.4.4;
import '../SafeMath.sol';

contract SafeMathMock is SafeMath {
  uint public result;

  function multiply(uint a, uint b) {
    result = safeMul(a, b);
  }

  function subtract(uint a, uint b) {
    result = safeSub(a, b);
  }

  function add(uint a, uint b) {
    result = safeAdd(a, b);
  }
}