test for UnsupportedPair errors

Author: hoytech

test/Basic.t.sol

@@ -2,6 +2,7 @@
 pragma solidity ^0.8.24;
 
 import {IEVault, IEulerSwap, EulerSwapTestBase, EulerSwap, TestERC20} from "./EulerSwapTestBase.t.sol";
+import {QuoteLib} from "../src/libraries/QuoteLib.sol";
 
 contract Basic is EulerSwapTestBase {
     EulerSwap public eulerSwap;
@@ -40,6 +41,14 @@ contract Basic is EulerSwapTestBase {
         assertEq(assetTST2.balanceOf(address(this)), amountOut);
     }
 
+    function test_badTokenAddrs() public {
+        vm.expectRevert(QuoteLib.UnsupportedPair.selector);
+        periphery.quoteExactInput(address(eulerSwap), address(assetTST), address(1234), 0);
+
+        vm.expectRevert(QuoteLib.UnsupportedPair.selector);
+        periphery.quoteExactInput(address(eulerSwap), address(1234), address(assetTST), 0);
+    }
+
     function test_altPrice() public {
         uint256 price = 0.5e18;
         uint256 px = price;