Questions tagged [testing]
questions regarding the testing during development of contracts and DApps
646
questions
1
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0
answers
10
views
Is it Possible to Run Multithreaded Tasks in Foundry?
I'm looking to run custom tasks/functions in parallel while using Foundry. Specifically, I'm interested in understanding if there's a way to use Foundry's fuzz testing capabilities to achieve ...
- 1,074
1
vote
1
answer
20
views
Is it possible to set a custom start time and block number for a local Hardhat node?
I'd like to configure my Hardhat node to start at a specific timestamp t, where t is less than the current timestamp Tc. The goal is to replay past mainnet transactions locally by setting the exact ...
- 1,074
0
votes
1
answer
70
views
vm.startPrank doesn't change the msg.sender in foundry
While I'm performing the testing in foundry. I'm facing an issue of vm.startPrank doesn't change the msg.sender.
CheatCodes cheats = CheatCodes(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
address ...
- 79
1
vote
1
answer
14
views
What is the right way to import a contract type that uses an interface in hardhat?
I have a contract with an interface that I want to test with hardhat
the contract looks like this
interface IGame {
function play(uint guess) external;
}
contract Test {
address private owner;...
- 49
1
vote
1
answer
26
views
Need help testing my smart contract
I am currently in the process of testing my solidity smart contract using hardhat and am a bit confused on how I should do it. This is the very first time I am testing a smart contract so I am bit ...
- 73
1
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0
answers
18
views
Free functions cannot have function visibility
I am developing my Dapp and as I am trying to compile and test my contract I keep getting an error saying that free functions cannot have visibility and I am very frustrated and confused as to what is ...
- 73
0
votes
1
answer
24
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I need 1000 Ethereum wallets for load testing of my project, is there a way i can get that?
I have to test out the functionality of auto reinvest in my smart contract in staking, therefore I need about 1000 Ethereum wallets to test out my code!
Please help me out here if there is any ...
0
votes
0
answers
18
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Error: call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ]
const { getNamedAccounts, deployments, ethers, network } = require("hardhat")
const { developmentChains, networkConfig } = require("../../helper-hardhat-config")
const { assert } = ...
0
votes
0
answers
72
views
Guidance on writing a Foundry Test for a deploy script! (Lesson 9: Raffle contract)
I am following the new foundry course by Patrick and was wondering if I could get tips on how to test the deploy script - https://github.com/Cyfrin/foundry-smart-contract-lottery-f23/blob/main/script/...
0
votes
1
answer
59
views
Foundry Fuzzing How to increase the runs to be more than default 256
I am testing the Foundry Fuzzing feature. Therefore I created this simple contract:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract Vault {
bool public s_locked;
uint private ...
- 195
0
votes
1
answer
117
views
Why do I get "Nothing to compile" everytime I run forge test -m *testname* on my foundry project?
I always get "Nothing to compile" everytime I run forge test -m testname on my foundry project and I don't know why
- 15
1
vote
1
answer
79
views
How to access the Event args while testing using ethers v6?
I am trying to access an events argument(s) while running tests for my smart contract using node.js/chai. Recently moved to using ethers v6, and the code that works on v5 is no longer valid.
Namely:
...
- 11
1
vote
2
answers
569
views
Ethers 6 transaction receipt events information
How i can get event name and params from tx receipt with Ethers 6?
I wanna write test to check if event was emitted.
Before each
beforeEach(async () => {
amount = tokens(10)
const ...
- 125
0
votes
0
answers
16
views
Hardhat Errors: Invalid value null supplied to : QUANTITY
Getting this error some times while testing a Hardhat file.
But when I cancel that script and run that same script again, it works.
The complete error is here:
"before each" hook: Before ...
1
vote
0
answers
9
views
Vyper: How to test internal helper functions?
I'm writing a Roulette contract as a learning activity in Vyper. My contract seems to be working through manual testing, and now I'm starting to write unit tests.
I have an internal helper function ...
- 151
0
votes
0
answers
32
views
Burn ERC1155 from ERC721 Contract
Would like to understand on how burn mechanism works on ERC1155, the ERC1155 is an airdrop token that will be use on GeneratedNFT.sol mint function so that it will to mint an ERC721 token and burn the ...
- 3
0
votes
1
answer
323
views
Getting the error: getAddress is not a function
I am running tests in hardhat and trying to get the contract deployed in the testing environment.
Here is the code I am using:
const { assert, expect } = require("chai");
const { deployments,...
- 1
0
votes
2
answers
886
views
Getting the Error: "Could not decode result data"
I am trying to run a FundMe.sol contract test on hardhat and I am getting the following error:
Error: could not decode result data (value="0x", info={ "method": "getPriceFeed&...
- 1
0
votes
2
answers
45
views
Solidity: Contract gets stuck in a for loop (Hardhat local Blockchain)
my smart contract keeps stopping in a for loop while testing with hardhat.
Here is the solidity Code:
function fulfillRandomWords(
uint256 requestId,
uint256[] memory randomWords
) internal ...
- 1
0
votes
0
answers
47
views
How to get the error message from the require statement?
I am using this test contract on Remix IDE
// SPDX-License-Identifier: MIT
pragma solidity 0.8.0;
contract testfunction{
function test() public pure{
require(false,"Testing ...
- 1
1
vote
1
answer
22
views
Smart Contract Testing of Crowd Funding
Hi Iam new in solidity program i don't know how to test the donate function can anybody help me how to test?
Actually I want to test when some donate the donater balance is minus and the person who ...
- 11
0
votes
2
answers
122
views
Testing ERC20 Token: Unable to cover Transfer and Approve from null/zero address
I'm working on a project using Hardhat and OpenZeppelin library for an ERC20 token. I've been able to achieve almost 100% coverage, but there are two lines that I'm struggling to cover:
transfer ...
- 111
0
votes
2
answers
78
views
Hardhat test error, missing argument in contract constructor
okay, I have edited my test file and now I am getting an entirely different error.
ERROR
1) BCCasino tests
"before each" hook for "..should deploy correctly":
...
0
votes
0
answers
123
views
Cannot read properties of undefined (reading '0')
I am following FreeCodeCamp's javascript Blockchain/SmartContract course. Facing issue at lesson 9 staging test. Contract deployment and unit tests are running fine. Running mocha test on sepolia ...
- 1
0
votes
0
answers
86
views
Trying Uniswap V3 Swap Example - Error: Transaction reverted: function call to a non-contract address
Have been getting bellow error message:
SwapExamples
swapExactInputSingle:
Error: Transaction reverted: function call to a non-contract account
at SwapExamples.swapExactInputSingle (contracts/...
- 1
0
votes
1
answer
61
views
What is the best way of setting limits of fuzz test input parameters in Foundry?
Let's take an example, where we have a stake function, with the stake's endTimestamp in uin64.
function stake(uint256 amount, uin64 endTimestamp)
It is assumed endTimestamp should never be less than ...
- 1,039
1
vote
0
answers
18
views
Contract is not deploying locally while testing for testcases
I am trying to write test cases for my code, here the MockV3Aggregator is supposed to run locally, upon deploying it works fine but when I try to only run the test case it seems that the ...
0
votes
1
answer
22
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 ...
- 631
0
votes
0
answers
14
views
Request testnet ETH and LINK tokens for the Sepolia testnet [duplicate]
I am trying to get a sepolia test link from faucets.chain.link, I have inserted my wallet address, I have selected the Request type (0.1Eth), I have verified that i am human; But the send request ...
1
vote
1
answer
158
views
How to test a function that returns array type struct using Foundry
I'm a beginner with Solidity, and I'm working on a smart contract that mints an NFT and stores relevant information inside a struct. The issue I'm currently facing is that when testing the ...
- 301
0
votes
0
answers
11
views
Not able to dynamically assign values to array
I am testing the correct emission of NFTMintedAll event on the following function, using hardhat:
event NFTMintedAll(
uint256 requestId,
address indexed owner,
uint256[] ...
- 631
0
votes
1
answer
23
views
Is it possible to load contracts in hardhat genesis block?
I am trying to test certain aspects of BSC chain. I need some system contracts, which I can't easily deploy to other addresses without breaking the whole existing system.
Is it possible to add ...
- 131
2
votes
0
answers
56
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
1
vote
3
answers
161
views
Simple OpenZeppeling mockCoin for local testing, Mint function gets stuck in testing
I have a very simple smart contract for a MOCK coin where I need a mint function to be able to be run by any address as it is just for testing. I took the code from OpenZepplin and removed OnlyOwner.
/...
0
votes
0
answers
54
views
TypeError: Cannot read property 'JsonRpcProvider' of undefined
I get this error when I run npm hardhat test on my sample-test.js file and I have no idea why it happens, here is the test code file:
// Import the necessary dependencies
const { expect } = require(&...
0
votes
0
answers
35
views
Foundry fuzzing fails and then passes when parameters are hardcoded
The following test will fail a fuzz test but then works when the same args are hardcoded.
function testOverflow(uint256 a, uint256 b) public {
// UINT256_MAX = ...
- 11
0
votes
1
answer
353
views
Trying to `forge init` in Foundry but getting below error. Also tried to `git commit -a` but then also its not solving the problem
$ forge init
Error:
The target directory is a part of or on its own an already initialized git repository,
and it requires clean working and staging areas, including no untracked files.
Check the ...
0
votes
1
answer
20
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
2
answers
236
views
How to configure custom ethereum node in foundry project?
Hardhat allows users to configure a custom network in the networks configuration object. This allows developers to run their JS/TS test suites against another local node such as Ganache or even a live ...
- 1,074
0
votes
1
answer
70
views
Why my test is failing here?
I am writing a test for checking a upgradable contract:
function test_Proxy() public {
vm.startPrank(address(user)); // checking is non-owner address can call the upgradeTo() or not
...
- 645
1
vote
1
answer
146
views
Error: Transaction reverted: function call to a non-contract account when calling flashLoan on balancer
I have forked the polygone mainnet in hardhat and when I call the makeFlashLoan function in my test I get the following error.
Error: Transaction reverted: function call to a non-contract account
Here ...
0
votes
0
answers
60
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
0
votes
0
answers
132
views
AssertionError: expected not equal to actual
here I have a written a code for testing a fund function
this is the code snippet
describe("fund", async function () {
it("it fails when you dont send enough money", async ...
0
votes
1
answer
202
views
Getting Fail with error 'ERC20: insufficient allowance'
First I'm deploying Cafe contract and get deployedId from it and then deploy CAFToken contract with deployedId of cafe contract. I've also added deploy script and test case, I guess everything is ...
1
vote
0
answers
50
views
Is VRFCoordinatorV2Mock working on mainnet forking or only in local network?
I'm testing my contracts, where I use Chainlink's VRF. I use the mainnet forking in a hardhat. I deployed VRFCoordinatorV2Mock, although it doesn't seem to work. Is VRFCoordinatorV2Mock supposed to ...
- 45
2
votes
1
answer
199
views
How to compare before and after balance of any address in while testing in hardhat?
I was writing test script for a contract.
I am stuck at a point where there is a claim function. whenever a user calls it, he gets the claimable ether, whatever available.
The problem is when I ...
- 1,257
0
votes
2
answers
48
views
Enhancing testability of contracts with immutable state variables
I have been encountering challenges when testing contracts that utilize immutable state variables. As we know, immutable variables are assigned only once during contract deployment and cannot be ...
- 4,336
0
votes
0
answers
39
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
0
votes
1
answer
267
views
Goerli ETH - Where get funds [duplicate]
I'm doing my computer engineering final degree work on Ethereum development. I am having a lot of problems to get GoerliETH, how do you guys get funding from testnets to develop your projects?
If ...
1
vote
1
answer
46
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 ...
