Add router test

test/ERC4626Router.t.sol

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.8.24;
+
+import { Test, console2 } from "forge-std/Test.sol";
+
+import { ERC4626Router, IERC4626 } from "@src/helper/ERC4626Router.sol";
+import { GenericStakedAppreciatingVault, RewardTracker, IERC20 } from "@src/staking/GenericStakedAppreciatingVault.sol";
+import { GenericMultiRewardsVault, IERC20, IERC20Metadata, SCALAR } from "@src/rewards/GenericMultiRewardsVault.sol";
+
+import { ERC20Mock } from "@test/mocks/ERC20Mock.sol";
+
+contract ERC4626RouterTest is Test {
+    ERC20Mock private token;
+
+    GenericStakedAppreciatingVault private stakingVault;
+    GenericMultiRewardsVault private rewardsVault;
+
+    ERC4626Router private router;
+
+    address private USER1 = address(0x1);
+
+    function setUp() public {
+        token = new ERC20Mock("Test Token", "TEST", 18);
+        stakingVault = new GenericStakedAppreciatingVault("Staked Test Token", "sTEST", IERC20(address(token)), 7 days);
+        rewardsVault = new GenericMultiRewardsVault(
+            "Rewardable Staked Test Token",
+            "rsTEST",
+            IERC20(address(stakingVault)),
+            address(this)
+        );
+
+        router = new ERC4626Router();
+    }
+
+    function test_ChainedDeposit() public {
+        uint256 depositAmount = 1000 * 10 ** 18;
+        token.mint(USER1, depositAmount);
+
+        vm.startPrank(USER1);
+        IERC4626[] memory vaults = new IERC4626[](2);
+        vaults[0] = stakingVault;
+        vaults[1] = rewardsVault;
+
+        token.approve(address(router), type(uint256).max);
+        router.depositChained(vaults, depositAmount);
+        vm.stopPrank();
+
+        assertEq(rewardsVault.balanceOf(USER1), depositAmount * 1e3);
+    }
+}