Assert.sol 在 Truffle 的 安装包下找到，类似这样的目录：

usr/local/lib/node_modules/truffle/build/Assert.sol

DeployedAddresses文件是在运行测试的时候动态生成的，它会根据部署的合约生成类似的合约：

contract DeployedAddresses {
  function MetaCoin() returns (address) {
    return 0x...; // address is hardcoded
  }
  // If there are more contracts deployed, they'll be included as well.
}