合约调用合约

Greeter.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;
import "forge-std/Test.sol";

contract Greeter is Test {
    string private name = "DMZ";
    function greet(uint256 num) public  {
        emit log_named_uint("greet",num);
    }
    function greet2(uint256 num) public returns( string memory){
        emit log_named_uint("greet2",num);
        return name;
    }
    function setname(string calldata n1) public {
        name = n1;
    }
}

Greeter.t.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;

import "forge-std/Test.sol";
import "src/Greeter.sol";

contract GreeterTest is Test {
    Greeter greeter;
    function setUp() public {
        greeter = new Greeter();
    }

    function testExample() public {
        //assertTrue(true);
        greeter.greet(123);
        bytes4 sign = 0xf9220889;
        address(greeter).call(abi.encodeWithSelector(sign,123));
    }
}