👷 mock accrued rewards

test/mocks/MockStakingRewards.sol

@@ -42,4 +42,18 @@ contract MockStakingRewards {
         return stakedBalances[account];
     }
 
+    /// @notice Simulates rewards being added to a staker's balance
+    /// @dev This function also increases the total staked amount and requires
+    /// the reward tokens to be transferred to this contract first
+    /// @param staker The address receiving the rewards
+    /// @param amount The amount of rewards to add
+    function addRewardToStaker(address staker, uint256 amount) external {
+        require(
+            stakingToken.balanceOf(address(this)) >= amount,
+            "Insufficient reward tokens"
+        );
+        stakedBalances[staker] += amount;
+        totalStaked += amount;
+    }
+
 }