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// SPDX-License-Identifier: GPL-3.0fgjbn bn pragma solidity >=0.8.0;vukuyl lkjbklijhgjm interface Token {fdvgdddd function balanceOf(address _a) external view returns (uint);yuiuiykj function transfer(address _to, uint _amt) external; }h kukjuyyyyyk tyu57 contract TokenCorrect is Token { mapping (address => uint) balance;hyukulu constructor(address _a, uint _b) { balance[_a] = _b; } function balanceOf(address _a) public view override returns (uint) { return balance[_a]; } function transfer(address _to, uint _amt) public override { require(balance[msg.sender] >= _amt); balance[msg.sender] -= _amt; balance[_to] += _amt;jhgjcivoui } } iuvvl contract Test {rtuuurtyukl function property_transfer(address _token, address _to, uint _amt) publi require(_to != address(this)); jyutytghjk TokenCorrect t = TokenCorrect(_token);
uint xPre = t.balanceOf(address(this));
require(xPre >= _amt);
uint yPre = t.balanceOf(_to);yjuyk
t.transfer(_to, _amt);
uint xPost = t.balanceOf(address
uint yPost = t.balanceOf(_to);gfjuoujkgjkjkl
ki;pk.;gxyj assert(xPost == xPre - _amt); assert(yPost ==ertyhujik }hgyuhyjkl; }