快速入门
-
安装Truffle环境
npm install -g truffle
-
安装测试网络
npm -g install ethereumjs-testrpc
-
创建Truffle项目
truffle init
Truffle将会自动下载相关依赖，创建目录
truffle_init.png
-
contracts: 智能合约代码
-
migrations: 部署文件
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test: 测试文件
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配置Truffle
打开truffle.js
module.exports = {
networks: {
development: {
host: "127.0.0.1",
port: 8545,
network_id: "*" // Match any network id
}
}
};
- port : testrpc 端口
-
编写合约
新建合约文件DogMarket.sol
在contracts目录下新建DogMarket.sol文件
pragma solidity ^0.4.17; //指定solidity版本
contract DogMarket { //创建合约
//保存领养信息
mapping(uint => address) public adopters; //映射，相当于JavaMap
function adoptDog(uint dogId) public returns(uint) {
adopters[dogId] = msg.sender;
return dogId;
}
function getAdoptUser(uint dogId) public returns(address) {
return adopters[dogId];
}
}
- 编译solidity文件
truffle compile
- 部署合约
在migrations目录下新建1_deploy_contracts.js
var DogMarket = artifacts.require("./DogMarket.sol");//引入上一步编写的solidity文件
module.exports = function(deployer) {
deployer.deploy(DogMarket);
};
- 运行命令
truffle migrate/truffle deploy
运行该命令将会把我们的合约部署到测试网络上。
-
测试合约
在test目录下新建DogMarketTest.sol
pragma solidity ^0.4.0;
import "truffle/DeployedAddresses.sol"; //引入地址
import "truffle/Assert.sol"; //引入断言
import "../contracts/DogMarket.sol"; // 被测试合约
contract DogMarketTest {
DogMarket market = DogMarket(DeployedAddresses.DogMarket());
function testAdopt() public {
uint petId = uint(11);
uint dogId = market.adoptDog(petId);
Assert.equal(petId, dogId, "Owner of pet ID 11.");
}
}
- 运行测试
truffle test
/media/jayden/E4B0C898B0C8729A/blockChain/truffle/pet-shop/contracts/DogMarket.sol:13:9: Warning: Function state mutability can be restricted to view
function getAdoptUser(uint dogId) public returns(address) {
^ (Relevant source part starts here and spans across multiple lines).
DogMarketTest
✓ testAdopt (165ms)
1 passing (1s)
由结果看出，我们的程序正确的返回了输入的petId，得到的dogId都是11，断言正确
