core/contracts/mocks/MockFollowModule.sol

// SPDX-License-Identifier: MIT

pragma solidity 0.8.15;

import {IFollowModule} from '../interfaces/IFollowModule.sol';

/**
 * @dev This is a simple mock follow module to be used for testing.
 */
contract MockFollowModule is IFollowModule {
    function initializeFollowModule(
        uint256,
        address,
        bytes calldata data
    ) external pure override returns (bytes memory) {
        uint256 number = abi.decode(data, (uint256));
        require(number == 1, 'MockFollowModule: invalid');
        return new bytes(0);
    }

    function processFollow(
        uint256 followerProfileId,
        address follower,
        address executor,
        uint256 profileId,
        bytes calldata data
    ) external override {}

    function isFollowing(
        uint256,
        uint256,
        address,
        uint256
    ) external pure override returns (bool) {
        return true;
    }

    function followModuleTransferHook(
        uint256 profileId,
        address from,
        address to,
        uint256 followNFTTokenId
    ) external override {}
}