Multihop: adds test for checking if the max_spread_bps is above

contracts/multihop/src/tests/swap.rs

@@ -225,6 +225,47 @@ fn swap_single_pool_no_fees() {
     assert_eq!(token2.balance(&recipient), 1_000i128); // +1_000 token1
 }
 
+#[test]
+#[should_panic(expected = "Pool: Assert max spread: spread exceeds maximum allowed")]
+fn swap_should_fail_when_spread_exceeds_the_limit() {
+    let env = Env::default();
+    let admin = Address::random(&env);
+
+    env.mock_all_auths();
+    env.budget().reset_unlimited();
+
+    let token1 = deploy_and_mint_tokens(&env, &admin, 1_001_000i128);
+    let token2 = deploy_and_mint_tokens(&env, &admin, 1_001_000i128);
+
+    let factory_client = deploy_and_initialize_factory(&env, admin.clone());
+
+    deploy_and_initialize_lp(
+        &env,
+        &factory_client,
+        admin.clone(),
+        token1.address.clone(),
+        1_000_000,
+        token2.address.clone(),
+        1_000_000,
+        None,
+    );
+
+    let multihop = deploy_multihop_contract(&env, admin.clone(), &factory_client.address);
+    let recipient = Address::random(&env);
+    token1.mint(&recipient, &5_000i128); // mints 50 token0 to recipient
+    assert_eq!(token1.balance(&recipient), 5_000i128);
+    assert_eq!(token2.balance(&recipient), 0i128);
+
+    let swap1 = Swap {
+        offer_asset: token1.address.clone(),
+        ask_asset: token2.address.clone(),
+    };
+
+    let operations = vec![&env, swap1];
+
+    multihop.swap(&recipient, &None, &operations, &None, &Some(7_000), &1_000);
+}
+
 #[test]
 fn swap_single_pool_with_fees() {
     let env = Env::default();