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contracts...test_delegate.sol

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity 0.8.16;

interface OracleInterface {
    function request() external;
}

abstract contract AssertorInterface {
    OracleInterface public oracle;
}

contract Wrapper {
    OracleInterface public oracle;
    AssertorInterface public assertor;
    constructor(AssertorInterface _assertor) {
        oracle = _assertor.oracle();
        assertor = _assertor;
    }
    event WrappedAsserted(address _this, address _sender);
    function wrappedAssert() external {
        emit WrappedAsserted(address(this), msg.sender);
        address(assertor).delegatecall(abi.encodeWithSignature("assert()"));
    }
}

contract Assertor {
    OracleInterface public oracle;
    constructor(OracleInterface _oracle) {
        oracle = _oracle;
    }
    event Asserted(address _this, address _sender);
    function assert() external {
        oracle.request();
        emit Asserted(address(this), msg.sender);
    }
}

contract Oracle {
    event Requested(address _this, address _sender);
    function request() external {
        emit Requested(address(this), msg.sender);
    }
}