Questions tagged [chai]
The chai tag has no usage guidance.
94
questions
0
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0
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6
views
ethers.utils.solidityKeccak256 in hardhat test file
Here is a test file.
ethers.getSigners() works fine
ethers.deployContract() works fine
for some reason, ethers.utils.solidityKeccak256 keeps breaking the code with this error:
'
TypeError: Cannot read ...
- 23
2
votes
1
answer
86
views
TypeError: Cannot read properties of undefined (reading 'checkUpkeep')
i'm getting this error while testing patrick collins smart-contract-lottery project, below is
the part where the error coming from.
describe("checkUpkeep", async function () {
...
- 33
-1
votes
1
answer
11
views
All my Assert.isTrue testing seems to be passing, im a bit skeptical about how efficient it's to test with asert.isTrue and assert.isFalse [closed]
Is Assert.isTrue efficient for testing solidity functions, all my testing are passing and I'm a bit skeptical about its efficiency.
- 17
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votes
0
answers
18
views
When I run the yarn hardhat test the console only shows 0passing(0ms) and the test didn't run
When I run the yarn hardhat test the console only shows 0passing(0ms), which means the test didn't run.
const { assert, expect } = require("chai")
const { ethers, deployments, ...
- 1
0
votes
0
answers
18
views
logging events while testing
In Current Version of ethers v6 ., once the event is emitted how we should log them ., because the older method of logging from transaction receipt is not working "
for example this is my ...
1
vote
0
answers
196
views
Cannot solve Error: Invalid Chai property: revertedWith
I am trying to run a test on my contract using hardhat and chai. But I am running into this error.
I have tried install ethereum-waffle. But it did not solve the problem. I also added ethereum-waffle ...
3
votes
4
answers
5k
views
Followed hardhat test tutorial and got "TypeError: (0 , ethers_1.getAddress) is not a function" error
I follow the simple tutorial by hardhat here https://hardhat.org/hardhat-runner/docs/other-guides/waffle-testing by creating Greeter.sol and test/test.js. This leads to the following error:
1) ...
- 137
0
votes
0
answers
25
views
Inheritance between contracts
I have a ZombieFactory contract which has a public array, I have another ZombieFeeding contract which inherits from ZombieFactory and I want to display the value of the zombies array defined and ...
- 1
1
vote
1
answer
125
views
Testing for success (no revert) in Hardhat
I'm using hardhat with mocha and chai to write tests for a contract. I'm trying to write a test that will expect a function call to be successful (not to revert); the function does not emit any events....
- 133
0
votes
1
answer
31
views
How to assert that a BigNumber is included in a list of numbers?
I am trying to assert a uint256 the following way:
expect(tokenType).to.be.oneOf([1, 2, 3, 4]);
I just want to check that its value is any of the ones on that list, as I am using a ...
- 683
2
votes
0
answers
74
views
Can not sign transaction with signer get from mnemonic
I'm writing test for MAX_SUPPLY of this function
// contract.sol
function mintStandard() public payable whenNotPaused {
require(
_standardCounter.current() <= 2222,
&...
- 33
0
votes
1
answer
32
views
How to you write tests for the transferFrom function for my ICO contract?
I want to write a test for the transferFrom(). I'm doing it by checking that the address balances change after the function is called. When I run the test, I get the error below. It's caused by the ...
- 71
0
votes
1
answer
235
views
How can i pass constructor args to test solidity contracts in Hardhat?
I am using openzepplin with role based access control to create erc-20 token
constructor(address minter, address burner) ERC20("ArtPlace Token", "ARTP") {
_mint(msg.sender, ...
- 1
0
votes
2
answers
59
views
How do I test burning tokens in my ICO contract?
I'm writing tests for the burn func in ICO.sol
The first two tests are passing, but when I come to test where the tokens are indeed burned, the state of the ICO seems to change. To burn tokens, the ...
- 71
0
votes
0
answers
77
views
Mocha Tests unexpected error
My tests where running well but not when I run yarn hardhat test, I get the error below.
Error
An unexpected error occurred:
TypeError: describe is not a function
at Object.<anonymous> (/...
- 71
2
votes
1
answer
141
views
AssertionError: expected BigNumber { value: "0" } to equal BigNumber { value: "0" }
I have created two basic ERC20 tokens (TokenA and TokenB) and a contract that swaps TokenA with TokenB.
Everything seems working but I get the error above when I run the test file.
How can BigNumber { ...
- 35
0
votes
1
answer
57
views
Hardhat Chai expect to.be.reverted fails on reversion
I have a basic ERC contract with the user deployer that is owner and only has rights to mint.
The mint function has an "onlyOwner" modifier with no message sent when reversion is triggered ...
- 41
1
vote
1
answer
56
views
Hardhat deploys contract to 2 different contract addresses while deploying uniswap clone
I am learning about writing tests with Hard Hat and using fixtures, but I am having the strangest issue when deploying a uniswap clone. My deployWETH fixture consistently returns the same contract ...
3
votes
1
answer
84
views
How to write test cases for custom errors?
I have a smart contract here that have mints NFTs and claim reward functions, and I have used custom errors instead of require
error stakeNotOver();
function claimReward(uint256 stakeId) external ...
1
vote
0
answers
118
views
What is the right typescript type for an event?
Not sure if this the right place thus my question involves more contract testing than solidity but here we go:
I implemented a contract factory and spent a couple of hours figuring out how to check if ...
- 111
0
votes
2
answers
283
views
Error: Timeout of 40000ms exceeded
I'm running a test using hardhat and chai. I keep getting this error:
Error: Timeout of 40000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure ...
- 53
0
votes
2
answers
219
views
Testing contract selfdestruct in Hardhat - Chai matchers
I'm writing unit tests for a solidity contract in a Hardhat project and I can't seem to find a selfdestruct matcher. Solidity Chai Matchers are a set of helper functions that make testing solidity ...
- 81
0
votes
1
answer
11
views
How I can create a test function which reicive a specific ammount of ether in hardhat?
The function what I want to test is this
function mint(uint256 tokenId) external payable {
require(msg.value == 0.01 ether, 'Wrong price');
_safeMint(msg.sender, tokenId);
}
...
2
votes
0
answers
106
views
AssertionError: Expected event "RaffleEnter" to be emited, but it doesn't exist in the contract
I'm working on freeCodeCamp.org's Learn Blockchain, Solidity, and Full Stack Web3 Development with JavaScript – 32-Hour Course
I have the following contract code:
//SPDX-License-Identifier: MIT
pragma ...
- 529
2
votes
2
answers
1k
views
How to work with block timestamps in ethers and hardhat?
I have a time-dependent contract that has two require statements
function launch(uint256 _goal, uint32 _startAt, uint32 _endAt) external {
require(_startAt >= block.timestamp, "...
- 131
1
vote
0
answers
76
views
Hardhat Staging test is getting errors
const { getNamedAccounts, ethers, network } = require("hardhat")
const { assert, expect } = require("chai")
const {
developmentChains,
networkConfig,
} = require("../../...
- 197
1
vote
1
answer
52
views
Hardhat Lottery test is failing
const { deployments, getNamedAccounts, ethers, network } = require("hardhat")
const { assert, expect } = require("chai")
const {
developmentChains,
networkConfig,
} = require(&...
- 197
0
votes
1
answer
136
views
Testing safeTransferFrom with onlyAllowedOperator using chai/hardhat
I am writing tests for an NFT using safeTransferFrom with onlyAllowedOperator and the tests are failing with and without onlyAllowedOperator. Here's the function:
function safeTransferFrom(address ...
- 125
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votes
1
answer
319
views
Im trying to run a js script on the blockchain using hardhat ,it throws an error whenever I run it on the command line
This is the following error I get when running the command "npx hardhat --network localhost scripts/1_deploy.js"
HeadersTimeoutError: Headers Timeout Error
at Timeout.onParserTimeout [...
- 11
0
votes
1
answer
159
views
check balance before and after transaction with chai
I'm writing the test cases for a contract, and I have a problem trying to match the balance, because of the transaction gas. what is the correct way to do it?
it("should allow the owner of the ...
- 105
0
votes
2
answers
876
views
Error: Transaction reverted: function selector was not recognized and there's no fallback nor receive function
I'm getting a console error in hardhat test case
this is my solidity code
/**
* donateToCampaign - Allows a user to donate to a specific campaign.
*
* @param _id the ID of the campaign to donate to....
- 105
1
vote
2
answers
898
views
conflict peer dependencies: nomicfoundation & hardhat-deploy-ethers
I'm facing a blockage so any help will be appreciated:
@nomiclabs/hardhat-ethers is an essential peer dependency to hardhat-deploy-ethers but that will prevent me from installing @nomicfoundation/chai-...
- 41
0
votes
3
answers
3k
views
Transaction reverted: trying to deploy a contract whose code is too large
My smart contract is over 300 lines of code, complete with events, modifiers, internal functions, getters and setters.
I'm trying to run tests using hardhat and chai. All I'm getting is this error:
...
1
vote
1
answer
21
views
Unittest for excisting NFT
I have build a contract (not yet deployed) that allows to check if the msg.sender holds a certain NFT:
pragma solidity ^0.8.17;
import "@openzeppelin/contracts/interfaces/IERC721.sol";
...
- 111
1
vote
0
answers
31
views
How can i bind log() to my runtime in my unit test file?
How can I make log() bind to my runtime in my chai unit-testing script?
I have a hardhat solidity project. Included snippets and pseudocode.
This framework is very new to me so if there are obvious ...
- 131
1
vote
1
answer
855
views
AssertionError: expected Promise{…} to equal 1
Code:
describe("uploading post", async () => {
let result, postCounter
const hash = "whatever"
before(async () => {
result = await ...
- 43
0
votes
2
answers
2k
views
Error: VM Exception while processing transaction: reverted with reason string 'Didn't send enough!' on testing contract
Getting this error while testing one of functions functionality in the contract
AssertionError: Expected transaction to be reverted with You need to spend more ETH!!, but other exception was thrown: ...
- 23
1
vote
1
answer
40
views
Principles of Testing Smart Contracts
Generally, when writing tests for smart contracts, how comprehensive do the tests have to be? Also, how does one know what to test (e.g., which line in the function in the original contract file the ...
4
votes
1
answer
140
views
How to get the gas costs of a reversed transaction when testing (with Chai / ethers.js / Hardhat)?
Does anyone know how to get the gas costs of a reversed transaction when testing with Hardhat / Chai?
I found out I can get the receipt object of a transaction, which holds the required data to ...
- 163
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0
answers
195
views
AssertionError: expected 0 to equal " ". The numerical values of the inputs were compared, and they differed
I'm pretty new to coding and solidiy - I'm testing a covered-call option smart contract in hardhat - specifically a function to check if the balance of the smart contract has been updated following ...
- 11
1
vote
1
answer
137
views
Hardhat and Chai testing : How should I write the test?
I've digged through all the related question, but none of these worked for me.
I used this repo, and replaced the contract and test file : https://github.com/NomicFoundation/hardhat-boilerplate
EDIT ...
- 51
1
vote
1
answer
284
views
TypeError: <FUNCTION_NAME>.owner / .connect() is not a function on hardhat unit testing
Plugin and tools used: hardhat-chai-matcher, chai, mocha
Issue:
Was wonder if its my environment setup wrong, so i ran other test but theyre passing just alright:
This is my test script written
...
- 13
1
vote
3
answers
1k
views
Hardhat chai .revertWith() not catching reverted error from Smart Contract
I am using Hardhat and chai for my testing and attempting to trigger an error that gets reverted to make sure my contract is acting properly. Note: I'm running on a forked hardhat chain of mainnet.
I ...
- 63
0
votes
1
answer
170
views
Getting error while testing transfer function using chai
I have a function that transfers the amount from owner to user. I'm getting success in the event emitted message and my test is failing every time.
Here is my code.
function investInMPay(uint256 ...
- 55
0
votes
1
answer
26
views
Event test failing because of address's casing
I am trying to test if the event is emitted with the correct arguments however my tests are failing because of some casing issue.
What is the best away to overcome this issue?
- 96
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124
views
Hardhat tests failing when testing require statement
Hi I am trying to test a smart contract I wrote using hardhat, with chai and @nomicfoundation/hardhat-chai-matchers.
I have followed the documentation however I am having no luck.
Please see below the ...
- 21
1
vote
1
answer
514
views
Writing Solidity tests for array length & contents (chai)
tdlr; solution
I had to await both of the values used in my assertions. For grabbing the length of the array, I needed to add a new method to my contract, as shown here. The reason for this is in the ...
- 113
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votes
0
answers
381
views
to.be.reverted function showing invalid chai property
it("money",async()=>{
console.log(await instance.hasRole("0xc5d48d6799b0d7d7cdfebe6afd6fac6dff6746359d2e02d434f8172e9a93fe97",accounts[8]));
console.log(await ...
2
votes
1
answer
41
views
How do you know when an operation should be performed synchronously or asynchronously in smart contract tests?
What operations are usually perform asynchronously in smart contract tests, and what operations are usually performed synchronously in smart contract tests? When are each of these usually used?
2
votes
1
answer
91
views
How do mocha and chai work?
I got this snippet from: https://hardhat.org/tutorial/testing-contracts
In this test, what does const { expect } = require("chai") mean? Also, I thought describe() is from the Mocha ...