chore: placeholder upgrade tests

foundry/src/FoxStaking.sol

@@ -16,6 +16,7 @@ contract FoxStaking is
     OwnableUpgradeable
 {
     using SafeERC20 for IERC20;
+    uint256 public version;
     IERC20 public foxToken;
     mapping(address => StakingInfo) public stakingInfo;
     bool public stakingPaused;
@@ -46,6 +47,7 @@ contract FoxStaking is
         __Ownable_init(msg.sender);
         __UUPSUpgradeable_init();
         __Pausable_init();
+        version = 1;
         foxToken = IERC20(foxTokenAddress);
         stakingPaused = false;
         withdrawalsPaused = false;

foundry/test/FoxStakingTestUpgrades.t.sol

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.25;
+
+import "forge-std/Test.sol";
+import "../src/FoxStaking.sol";
+import "@openzeppelin/contracts/utils/Strings.sol";
+import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
+import {Pausable} from "@openzeppelin/contracts/utils/Pausable.sol";
+import {Upgrades} from "openzeppelin-foundry-upgrades/Upgrades.sol";
+import {MockFOXToken} from "./MockFOXToken.sol";
+
+contract FOXStakingTestUpgrades is Test {
+    FoxStaking public foxStaking;
+    MockFOXToken public foxToken;
+    address user = address(0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045);
+
+    function setUp() public {
+        foxToken = new MockFOXToken();
+        address foxStakingProxy = Upgrades.deployUUPSProxy(
+            "FoxStaking.sol",
+            abi.encodeCall(FoxStaking.initialize, (address(foxToken)))
+        );
+        foxStaking = FoxStaking(foxStakingProxy);
+    }
+
+    function testCanDeploy() public view {
+        uint256 expectedVersion = 1;
+        assertEq(foxStaking.version(), expectedVersion);
+    }
+}

foundry/test/MockFOXToken.sol

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.25;
+
+import "forge-std/Test.sol";
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract MockFOXToken is ERC20 {
+    constructor() ERC20("Mock FOX Token", "FOX") {
+        // 1M FOX for testing, only in local chain can't use this as voting power soz
+        _mint(address(this), 1e24);
+    }
+
+    function makeItRain(address to, uint256 amount) public {
+        _transfer(address(this), to, amount);
+    }
+}