Lesson 7： Error: could not decode result data (value="0x", info={ "method": "priceFeed", "signature": "priceFeed()" }, code=BAD_DATA, version=6.13.2)

[Tang-hw]

Hi please help me.

This is FundMe.test.js

const { deployments, ethers, getNamedAccounts } = require("hardhat");
const { assert } = require("chai");

describe("FundMe", async function () {
  let fundMe;
  let deployer;
  let mockV3Aggregator;
  beforeEach(async function () {
    deployer = (await getNamedAccounts()).deployer;
    await deployments.fixture(["all"]);
    fundMe = await ethers.getContractAt("FundMe", deployer);
    mockV3Aggregator = await ethers.getContractAt("MockV3Aggregator", deployer);
  });

  describe("constructor", async function () {
    it("sets the aggreator addresses correctly", async function () {
      const response = await fundMe.priceFeed();
      assert.equal(response, mockV3Aggregator.address);
    });
  });
});

This is error :

owen@DESKTOP-OWEN:~/hh-fcc/hardhat-fund-me-fcc$ yarn hardhat test
yarn run v1.22.22
warning package.json: No license field
$ /home/owen/hh-fcc/hardhat-fund-me-fcc/node_modules/.bin/hardhat test


  FundMe
    constructor
      1) sets the aggreator addresses correctly


  0 passing (5s)
  1 failing

  1) FundMe
       constructor
         sets the aggreator addresses correctly:
     Error: could not decode result data (value="0x", info={ "method": "priceFeed", "signature": "priceFeed()" }, code=BAD_DATA, version=6.13.2)
      at makeError (node_modules/ethers/src.ts/utils/errors.ts:694:21)
      at assert (node_modules/ethers/src.ts/utils/errors.ts:715:25)
      at Interface.decodeFunctionResult (node_modules/ethers/src.ts/abi/interface.ts:916:15)
      at staticCallResult (node_modules/ethers/src.ts/contract/contract.ts:346:35)
      at staticCall (node_modules/ethers/src.ts/contract/contract.ts:303:24)
      at Proxy.priceFeed (node_modules/ethers/src.ts/contract/contract.ts:351:41)
      at Context.<anonymous> (test/unit/FundMe.test.js:17:24)



error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.