在contracts下新建一个文件mathControl.sol
pragma solidity >=0.4.22 <0.9.0;
contract MathContract {
function add(uint a,uint b) public pure returns(uint){
return a+b;
}
function sub(uint a,uint b) public pure returns(uint) {
return a-b;
}
function mul(uint a,uint b) public pure returns(uint) {
return a*b;
}
}
在migrations下新建一个部署合约的js文件：2_initial_migration.js
//const Migrations = artifacts.require("Migrations");
var Math=artifacts.require("./MathContract.sol");
module.exports = function (deployer) {
deployer.deploy(Math);
};
在test目录下新建一个执行智能合约的js文件：mathcontract.js
var MathContract=artifacts.require("MathContract")
contract('MathContract',function(accounts){
it("first",function(){
return MathContract.deployed().then(function(instance){
console.log(instance.address)
instance.add(1,1).then(function(result) {
console.log(result)
assert.equal(result,2,"add prompt");
})
instance.sub(5,1).then(function(result) {
console.log(result)
assert.equal(result,4,"sub prompt");
})
instance.mul(5,2).then(function(result) {
console.log(result)
assert.equal(result,10,"mul prompt");
})
})
})
it("sencode",function(){
return MathContract.deployed().then(function(instance){
console.log(instance.address)
instance.add(1,1).then(function(result) {
console.log(result.toNumber())
assert.equal(result,2,"add prompt");
})
instance.sub(5,1).then(function(result) {
console.log(result.toNumber())
assert.equal(result,4,"sub prompt");
})
instance.mul(5,2).then(function(result) {
console.log(result.toNumber())
assert.equal(result,10,"mul prompt");
})
})
})
})
合约编译：
truffle compile
合约部署：
truffle migrate
合约调用：
truffle test ./test/mathcontract.js
运行结果：
