// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.7.6;

import '../libraries/UnsafeMath.sol';

contract UnsafeMathEchidnaTest {
    function checkDivRoundingUp(uint256 x, uint256 d) external pure {
        require(d > 0);
        uint256 z = UnsafeMath.divRoundingUp(x, d);
        uint256 diff = z - (x / d);
        if (x % d == 0) {
            assert(diff == 0);
        } else {
            assert(diff == 1);
        }
    }
}