107:    function addStrategy(IStrategy strategy) external onlyRole(VAULT_MANAGER_ROLE) {
108:        if (address(strategy) == address(0)) revert InvalidStrategy();
109:        _strategies.push(strategy);
110:        _weights.push(0);
111:        emit AddStrategy(address(strategy));
112:    }
  it.only('Add Strategy - no allowance', async () => {
    const { vault, usdc, owner, otherAccount } = await loadFixture(deployMultiStrategyVaultFixture);

    //@audit-info deploy a new strategy
    const Strategy = await ethers.getContractFactory('StrategySupplyAAVEv3');
    const strategy = await Strategy.deploy(
      owner.address,
      await usdc.getAddress(),
      otherAccount.address,
    );
    await strategy.waitForDeployment();
    //@audit-info add the new strategy to vault
    await vault.addStrategy(await strategy.getAddress());
    //@audit-info the new strategy has been added
    expect(await vault.strategies()).to.include(await strategy.getAddress());
    expect(await vault.asset()).to.equal(await usdc.getAddress());
    //@audit-info however, the new strategy was not approved to spend asset of vault
    expect(await usdc.allowance(vault.target, strategy.target)).to.equal(0);
  });
    function addStrategy(IStrategy strategy) external onlyRole(VAULT_MANAGER_ROLE) {
        if (address(strategy) == address(0)) revert InvalidStrategy();
        _strategies.push(strategy);
        _weights.push(0);
+       IERC20(strategy.asset()).approve(address(strategy), type(uint256).max);
        emit AddStrategy(address(strategy));
    }
