feat: test live cloning

contracts/Strategy.sol

@@ -4,9 +4,15 @@ pragma solidity 0.6.12;
 pragma experimental ABIEncoderV2;
 
 // These are the core Yearn libraries
-import {BaseStrategy, StrategyParams} from "@yearnvaults/contracts/BaseStrategy.sol";
+import {
+    BaseStrategy,
+    StrategyParams
+} from "@yearnvaults/contracts/BaseStrategy.sol";
 import "@openzeppelin/contracts/math/Math.sol";
-import {IERC20, Address} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
+import {
+    IERC20,
+    Address
+} from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
 
 import "../interfaces/IDetailedERC20.sol";
 import "../interfaces/Stargate/IStargateRouter.sol";

tests/test_clone_live.py

@@ -0,0 +1,45 @@
+import pytest
+
+from brownie import chain, Wei, reverts, Contract, accounts
+
+
+def test_clone_for_usdt(
+    gov,
+    amount,
+    RELATIVE_APPROX,
+):
+    token = Contract("0xdac17f958d2ee523a2206206994597c13d831ec7") #usdt
+    token_whale = accounts.at("0x5a52e96bacdabb82fd05763e25335261b270efcb", force=True)
+    vault = Contract("0x3B27F92C0e212C671EA351827EDF93DB27cc0c65") #usdt 043
+    strategy = Contract("0x7c85c0a8e2a45eeff98a10b6037f70daf714b7cf") #usdc strategy which is clonable
+    clone_tx = strategy.clone(
+        "0x3B27F92C0e212C671EA351827EDF93DB27cc0c65",
+        "0x16388463d60ffe0661cf7f1f31a7d658ac790ff7",
+        "0x93a62da5a14c80f265dabc077fcee437b1a0efde",
+        "0x736d7e3c5a6cb2ce3b764300140abf476f6cfccf",
+        "0xB0D502E938ed5f4df2E681fE6E419ff29631d62b",
+        1,
+        "0xee9f2375b4bdf6387aa8265dd4fb8f16512a1d46",
+        "StargateUSDTStaker",
+        {"from": "0x16388463d60ffe0661cf7f1f31a7d658ac790ff7"},
+    )
+
+    cloned_strategy = Contract.from_abi(
+        "Strategy", clone_tx.events["Cloned"]["clone"], strategy.abi
+    )
+
+    vault.acceptGovernance({"from": gov})
+    vault.setDepositLimit(100_000_000e6,{"from": gov})
+    vault.addStrategy(cloned_strategy, 10_000, 0, 2 ** 256 - 1, 0, {"from": gov})
+
+    token.approve(vault, 2 ** 256 - 1, {"from": token_whale})
+    vault.deposit(amount, {"from": token_whale})
+
+    chain.sleep(1)
+    cloned_strategy.harvest({"from": gov})
+
+    assert pytest.approx(cloned_strategy.estimatedTotalAssets(), rel=RELATIVE_APPROX) == amount
+
+    assert (
+        vault.strategies(cloned_strategy).dict()["totalLoss"] < 10
+    )  # might be a loss from rounding