“`soliditypragma solidity ^0.8.0;

contract Unit {

// Define a function to demonstrate unit testing function addTwoNumbers(uint a, uint b) public pure returns (uint) { return a + b; }}“`

Explanation:

• The unit contract defines a addTwoNumbers function that takes two unsigned integers a and b as input and returns their sum.
• The pure keyword indicates that the function does not modify the contract’s state and can be safely copied into the bytecode.
• The function’s return type is uint, which is an unsigned integer.

Testing the function:

To test the addTwoNumbers function, you can use a testing framework like Truffle or Hardhat. Here’s an example test case:

“`import “@openzeppelin/contracts/test/contracts/unit.sol”;

contract UnitTest is unittest.Contract {

function testAddTwoNumbers() public { Unit unitContract = new Unit(); uint result = unitContract.addTwoNumbers(5, 10); assert.equal(result, 15); }}“`

Note:

This is just an example contract and test case. You can modify the code to suit your own needs.