Testing in hardhat and solidity arrays

[AmadiMichael]

Hello guys
In lesson 6

Patrick mentioned that we can go ahead for write tests for the lines that he didn't so I decided to take up the challenge..

To do this test I decided to write a function in the SimpleStorage.sol that creates a memory array of People structs and length set to people.length.

Then it loops through the already existing people array and sets each array member's index to be equal to the corresponding index on the new array I created in memory. Then I return it.

    function viewPerson() public view returns (People[] memory) {
        People[] memory first = new People[](people.length);
        uint counter = 0;
        for (uint i = 0; i < people.length; i++) {
            first[counter] = people[i];
        }
        return first;
    }

It works fine as it should in solidity but in the tests when I write it. It has some errors

Here is my test file

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

describe("Simple Storage", function () {
  it("Should return 10 as store", async function () {
    const SimpleStorage = await ethers.getContractFactory("SimpleStorage");
    const simpleStorage = await SimpleStorage.deploy();
    await simpleStorage.deployed();

    expect(await simpleStorage.retrieve()).to.equal(0);

    const setStore = await simpleStorage.store(10);
    await setStore.wait();

    expect(await simpleStorage.retrieve()).to.equal(10);
  });

  it("Should return 'Michael' and 2 as people", async function () {
    const SimpleStorage = await ethers.getContractFactory("SimpleStorage");
    const simpleStorage = await SimpleStorage.deploy();
    await simpleStorage.deployed();

    //expect(await simpleStorage.viewPeople()).to.equal([]);

    const setStore = await simpleStorage.addPerson("Michaels", 2);
    await setStore.wait();

    console.log(await simpleStorage.viewPerson());
    expect(await simpleStorage.viewPerson()).to.equal([
      BigNumber.from(2),
      "Michaels",
    ]);
  });
});

But when i run

npx hardhat test

It gives this error in my terminal

Simple Storage
    ✓ Should return 10 as store
[
  [
    BigNumber { value: "2" },
    'Michaels',
    favoriteNumber: BigNumber { value: "2" },
    name: 'Michaels'
  ]
]

    1) Should return 'Michael' and 2 as people


  1 passing (2s)
  1 failing

  1) Simple Storage
       Should return 'Michael' and 2 as people:

      AssertionError: expected [ …(1) ] to equal [ Array(2) ]
      + expected - actual

       [
      -  [
      -    {
      -      "_hex": "0x02"
      -      "_isBigNumber": true
      -    }
      -    "Michaels"
      -  ]
      +  {
      +    "_hex": "0x02"
      +    "_isBigNumber": true
      +  }
      +  "Michaels"
       ]
      
      at Context.<anonymous> (test/sample-test.js:30:49)

Anyone experiencing this or done this successfully yet?

Or is there a way to read the value of the array directly like functions without having to create a function in solidity

[BPR24]

Hey!

I was looking for a solution to test my entire code too and I was struggling with how to test the array and the mapping.

I've found the answer on another discussion, check it out : #483

Hopefully I'm not too late!

[AmadiMichael]

Oh wow nice, thanks for this!

[AmadiMichael]

Oh wow nice, thanks for this ! This will help

…

On Sun, Jul 31, 2022, 2:01 AM BLR19 ***@***.***> wrote: Hey! I was looking for a solution to test my entire code too and I was struggling with how to test the array and the mapping. I've found the answer on another discussion, check it out : #483 <#483> Hopefully I'm not too late! — Reply to this email directly, view it on GitHub <#634 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AXHT2IAVRS6P4AZN7P5MLOLVWXF7LANCNFSM52DSH6IA> . You are receiving this because you authored the thread.Message ID: <smartcontractkit/full-blockchain-solidity-course-js/repo-discussions/634/comments/3288866 @github.com>