Feature/Downcast CwOrchError

contracts/counter/src/error.rs

@@ -1,7 +1,7 @@
 use cosmwasm_std::StdError;
 use thiserror::Error;
 
-#[derive(Error, Debug)]
+#[derive(Error, PartialEq, Debug)]
 pub enum ContractError {
     #[error("{0}")]
     Std(#[from] StdError),

contracts/counter/tests/integration_tests.rs

@@ -2,7 +2,7 @@
 use counter_contract::{
     contract::CONTRACT_NAME,
     msg::{GetCountResponse, InstantiateMsg, QueryMsg},
-    CounterContract,
+    ContractError, CounterContract,
 };
 // Use prelude to get all the necessary imports
 use cw_orch::prelude::*;
@@ -49,6 +49,8 @@ fn setup<Chain: CwEnv>(chain: Chain) -> CounterContract<Chain> {
 fn count() {
     // Create a sender
     let sender = Addr::unchecked(ADMIN);
+    // Create a user
+    let user = Addr::unchecked(USER);
     // Create the mock
     let mock = Mock::new(&sender);
 
@@ -58,7 +60,7 @@ fn count() {
     // Increment the count of the contract
     contract
         // Set the caller to user
-        .call_as(&Addr::unchecked(USER))
+        .call_as(&user)
         // Call the increment function (auto-generated function provided by CounterExecuteMsgFns)
         .increment()
         .unwrap();
@@ -84,6 +86,15 @@ fn count() {
     let count = contract.get_count().unwrap();
     assert_eq!(count.count, 0);
     // ANCHOR_END: reset
+
+    // Check negative case
+    let exec_res = contract.call_as(&user).reset(0);
+
+    let expected_err = ContractError::Unauthorized {};
+    assert_eq!(
+        exec_res.unwrap_err().downcast::<ContractError>().unwrap(),
+        expected_err
+    );
 }
 // ANCHOR_END: count_test
 // ANCHOR_END: integration_test

cw-orch/src/error.rs

@@ -39,4 +39,14 @@ impl CwOrchError {
             _ => panic!("Unexpected error type"),
         }
     }
+
+    pub fn downcast<E>(self) -> anyhow::Result<E>
+    where
+        E: std::fmt::Display + std::fmt::Debug + Send + Sync + 'static,
+    {
+        match self {
+            CwOrchError::AnyError(e) => e.downcast(),
+            _ => panic!("Unexpected error type"),
+        }
+    }
 }