Solc-js: error "before each" hook for "deploys a contract": ReferenceError: accounts is not defined

I have just started building contracts. Kindly help me in resolving this error. Attached image of error.enter image description here


pragma solidity ^0.4.17;    contract Lottery{     address public manager;     address[] public players;          function lottery() public{         manager = msg.sender;     }          function enter() public payable{         require(msg.value > 0.01 ether);                  players.push(msg.sender);     }          function random() private view returns (uint){         return uint(keccak256(block.difficulty, now, players));     }          function pickWinner() public restricted{                  uint index = random() % players.length;         players[index].transfer(this.balance);         players = new address[](0);     }          modifier restricted(){         require(msg.sender == manager);         _;     }          function getPlayers() public view returns (address[] memory){         return players;     } } 


const assert = require('assert'); const ganache = require('ganache-cli'); const Web3 = require('web3');  const web3 = new Web3(ganache.provider());  const {interface, bytecode} = require('../compile');  let lottery; let account;  beforeEach(async()=> {     account = await web3.eth.getAccounts();      lottery = await new web3.eth.Contract(JSON.parse(interface))         .deploy({data: bytecode})         .send({from: accounts[0], gas: '1000000'}); });  describe('Lottery Contract',() => { it('deploys a contract', () => {     assert.ok(lottery.options.address);     }); }); 


const path = require('path'); const fs = require('fs'); const solc = require('solc');    const lotteryPath = path.resolve(__dirname, 'contract', 'Lottery.sol'); const source = fs.readFileSync(lotteryPath, 'utf-8');  module.exports = solc.compile(source,1).contracts[':Lottery']; 

Solc-js: error "before each" hook for "deploys a contract": ReferenceError: accounts is not defined

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