testing: TypeError: simpleStorage.retrieve is not a function

[mghildiy]

I am trying to run first test(on YT video its around @9:35:00). Deploy.js works fine for SimpleStorage. But test has issues with retrieve function:

$ yarn hardhat test
yarn run v1.22.19
$ .../hardhat-simple-storage/node_modules/.bin/hardhat test


  SimpleStorage
    1) should start with a favourite number of 0


  0 passing (28s)
  1 failing

  1) SimpleStorage
       should start with a favourite number of 0:
     TypeError: simpleStorage.retrieve is not a function
      at Context.<anonymous> (test/test-deploy.js:13:47)



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

If deploy.js is working fine, why test-deploy is having issues with a function?

[alymurtazamemon]

@mghildiy make sure you are adding parenthesis along with retrieve ()

[mghildiy]

Here is my test code:

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

describe("SimpleStorage", function () {
  let simpleStorageFactory, simpleStorage;

  beforeEach(async function () {
    simpleStorageFactory = await ethers.getContractFactory("SimpleStorage");
    simpleStorage = simpleStorageFactory.deploy();
  });

  it("should start with a favourite number of 0", async function () {
    const currentNumber = await simpleStorage.retrieve();

    assert.equal(currentNumber.toString(), 0);
  });
});

[alymurtazamemon]

@mghildiy

- assert.equal(currentNumber.toString(), 0);
+ assert.equal(currentNumber.toString(), "0");

[mghildiy]

May be await is needed here:

simpleStorage = simpleStorageFactory.deploy();

[mghildiy]

Yes, await was needed. Just checked and now it works. Thanks.

[alymurtazamemon]

@mghildiy Yes, I did not see that!

[mghildiy]

@mghildiy

- assert.equal(currentNumber.toString(), 0);
+ assert.equal(currentNumber.toString(), "0");

I guess JS takes care of type conversion here, so its not an issue.

[alymurtazamemon]

@mghildiy And also the above issue, you need to specify right side value also in string form.