找不到模块'fs-extra' npm

如何解决找不到模块'fs-extra' npm

使用 truffle@5.3.2、ganache@2.5.4、node@10.19.0、npm@7.10.0

区块链开发者

$ sudo truffle migrate --reset 

工作正常......从ganache中的假账户消耗gas。

 $ sudo truffle test

     Using network 'development'.

Error: Cannot find module 'fs-extra'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.call (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/external "fs-extra":1:18)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/compile-common/dist/src/profiler/updated.js:33:26)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/compile-common/dist/src/profiler/profiler.js:20:19)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/compile-common/dist/src/profiler/index.js:3:18)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/compile-common/dist/src/index.js:25:18)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/debugger/lib/session/index.js:31:1)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/debugger/lib/debugger.js:4:1)
    at r (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at Object.call (/home/amal/work/truffle/packages/debugger/debugger.js:1:16)
    at __webpack_require__ (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:19:22)
    at /usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/bootstrap:83:10
    at factory (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/debugger.js:1:1152)
    at /usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/universalModuleDefinition:3:20
    at Object.<anonymous> (/usr/local/lib/node_modules/truffle/node_modules/@truffle/debugger/dist/webpack/universalModuleDefinition:1:1)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
Truffle v5.3.2 (core: 5.3.2)
Node v10.19.0

采取的措施

1.

    $ sudo npm ls fs-extra
 pet-shop@1.0.0 /home/phenomenal/blockchain    

    +-- fs-extra@3.0.1
    
          -- lite-server@2.6.1
    
          -- browser-sync@2.26.14
    
        `-- fs-extra@3.0.1 deduped

2. *npm install -g npm-reinstall*
3. *npm install -g npm@latest*

但没有任何效果！！！

这是测试文件 election.js

var Election = artifacts.require('./Election.sol');

contract("Election",function(accounts){

    it("Initializes with two candidates",function(){            //Mocha framework
        return Election.deployed().then(function(instance){
            return instance.candidatesCount();
        }).then(function(count){
            asserts equal(count,2); //Chai Library Function
        });
    });

});

Election.sol 文件

contract Election {
    
    //Model of Candidate
    struct Candidate{
        uint id;
        string name;
        uint voteCount;
    }

    //Store Candidate
    //Fetch Candidate
    mapping(uint => Candidate) public listOfCandidates;

    //Store Candidate Count
    uint public candidatesCount;


    //construtor
    constructor() public {
        addCandidate("Candidate 1");
        addCandidate("Candidate 2");
    }
    
    function addCandidate(string memory _name) private{
        candidatesCount++;
        listOfCandidates[candidatesCount] = Candidate(candidatesCount,_name,0);
    }   
}

Package.json 文件

 {
  "name": "pet-shop","version": "1.0.0","description": "","main": "truffle.js","directories": {
    "test": "test"
  },"scripts": {
    "dev": "lite-server","test": "echo \"Error: no test specified\" && exit 1"
  },"author": "","license": "ISC","devDependencies": {
    "lite-server": "^2.3.0"
  },"dependencies": {
    "fs-extra": "^3.0.1"
  }
}

请帮助如果需要，我会向您发送完整的项目或所需的文件。