test: get alm tests passing

src/contracts/core/AllocationManager.sol

@@ -62,7 +62,7 @@ contract AllocationManager is
         OperatorSet memory operatorSet = OperatorSet(msg.sender, params.operatorSetId);
         bool isRegistered = _isRegistered(params.operator, operatorSet);
         require(_operatorSets[operatorSet.avs].contains(operatorSet.id), InvalidOperatorSet());
-        require(isRegistered, InvalidOperator());
+        require(isRegistered, NotMemberOfSet());
 
         uint256 length = _operatorSetStrategies[operatorSet.key()].length();
         IStrategy[] memory strategiesSlashed = new IStrategy[](length);
@@ -691,6 +691,13 @@ contract AllocationManager is
         return operatorSets;
     }
 
+    /// @inheritdoc IAllocationManager
+    function isOperatorSet(
+        OperatorSet memory operatorSet
+    ) external view returns (bool) {
+        return _operatorSets[operatorSet.avs].contains(operatorSet.id);
+    }
+
     /// @inheritdoc IAllocationManager
     function getMembers(
         OperatorSet memory operatorSet

src/contracts/interfaces/IAllocationManager.sol

@@ -36,7 +36,7 @@ interface IAllocationManagerErrors {
     error OperatorNotSlashable();
     /// @dev Thrown when trying to add an operator to a set they are already a member of
     error AlreadyMemberOfSet();
-    /// @dev Thrown when trying to remove an operator from a set they are not a member of
+    /// @dev Thrown when trying to slash/remove an operator from a set they are not a member of
     error NotMemberOfSet();
 
     /// Operator Set Status
@@ -464,6 +464,13 @@ interface IAllocationManager is ISignatureUtils, IAllocationManagerErrors, IAllo
         address operator
     ) external view returns (OperatorSet[] memory operatorSets);
 
+    /**
+     * @notice Returns whether the operator set exists
+     */
+    function isOperatorSet(
+        OperatorSet memory operatorSet
+    ) external view returns (bool);
+
     /**
      * @notice Returns all the operators registered to an operator set
      * @param operatorSet The operatorSet to query.

src/test/DevnetLifecycle.t.sol

@@ -162,7 +162,7 @@ contract Devnet_Lifecycle_Test is Test {
 
         allocationManager.registerForOperatorSets(IAllocationManagerTypes.RegisterParams(avs, operatorSetIds, ""));
 
-        // assertEq(allocationManager.getMemberAtIndex(OperatorSet(avs, operatorSetId), 0), operator);
+        assertEq(allocationManager.getMembers(OperatorSet(avs, operatorSetId))[0], operator);
     }
 
     function _setMagnitude() public {

src/test/mocks/MockAVSRegistrar.sol

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: BUSL-1.1
+pragma solidity ^0.8.27;
+
+contract MockAVSRegistrar {
+    fallback () external {}
+}