The network id specified in the truffle config (4447) does not match the one returned by the network (5777)

Question

Here my test js file

const ApprovalContract = artifacts.require('../../contracts/ApprovalContract.sol');

contract('ApprovalContract' function (accounts) {

    it('initiates contract', async function() {
        const contract = await ApprovalContract.deployed();
        const approver = await contract.approver.call();
        assert.equal(approver, 0x3999BA5D247c800E5Ef3d4de66618741E3675379, "approver don't match");
    });
})

Answer 1

I encountered the same thing when running truffle test.

The reason is likely because truffle-config.js from truffle unbox <package> have network information commented out.

Thus, the port and network_id default to 4447, which is what truffle test defaults to if nothing is specified in truffle-config.js

See: https://github.com/trufflesuite/truffle/pull/1577/files

What you will need to do is to uncomment the networks config in truffle-config.js.

module.exports = {
  /* <- NOTE: need to uncomment this!
  networks: {
    development: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*"
    },
    test: {
      host: "127.0.0.1",
      port: 7545,
      network_id: "*"
    }
  }
  */ <- NOTE: need to uncomment this!
};

Answer 2

delete file truffle.js

file truffle-config.js module.exports = { networks: { development: { host: "127.0.0.1", port: 7545, network_id: "*" } } };

Answer 3

In my case, i did not specify the truffle-config.js in Gananche.

Go to the setting and add correct truffle-config.js