custom error serializations

bindings/core/tests/serialize_error.rs

@@ -1,20 +1,35 @@
 // Copyright 2023 IOTA Stiftung
 // SPDX-License-Identifier: Apache-2.0
 
-use iota_sdk::{client::Error as ClientError, wallet::Error as WalletError};
+use crypto::keys::bip44::Bip44;
+use iota_sdk::{
+    client::{constants::SHIMMER_COIN_TYPE, Error as ClientError},
+    wallet::Error as WalletError,
+};
 use iota_sdk_bindings_core::Error;
 use pretty_assertions::assert_eq;
 
 #[test]
 fn custom_error_serialization() {
+    // testing a unit-type-like error
     let error = Error::Client(ClientError::HealthyNodePoolEmpty);
     assert_eq!(
         serde_json::to_string(&error).unwrap(),
         "{\"type\":\"client\",\"error\":\"no healthy node available\"}"
     );
-    let error = Error::Wallet(WalletError::MissingBipPath);
+    // testing a tuple-like error
+    let error = Error::Wallet(WalletError::InvalidMnemonic("nilly willy".to_string()));
     assert_eq!(
         serde_json::to_string(&error).unwrap(),
-        "{\"type\":\"wallet\",\"error\":\"missing BIP path\"}"
+        "{\"type\":\"wallet\",\"error\":\"invalid mnemonic: nilly willy\"}"
+    );
+    // testing a struct-like error
+    let error = Error::Wallet(WalletError::BipPathMismatch {
+        old_bip_path: None,
+        new_bip_path: Some(Bip44::new(SHIMMER_COIN_TYPE)),
+    });
+    assert_eq!(
+        serde_json::to_string(&error).unwrap(),
+        "{\"type\":\"wallet\",\"error\":\"BIP44 mismatch: Some(Bip44 { coin_type: 4219, account: 0, change: 0, address_index: 0 }), existing bip path is: None\"}"
     );
 }