[Fund9 backport] add additional info in spending counters mismatch errors

chain-impl-mockchain/src/accounting/account/mod.rs

@@ -31,8 +31,11 @@ pub enum LedgerError {
     AlreadyExists,
     #[error("Removed account is not empty")]
     NonZero,
-    #[error("Spending credential invalid")]
-    SpendingCredentialInvalid,
+    #[error("Spending credential invalid, expected {} got {} in lane {}", .expected.unlaned_counter(), .actual.unlaned_counter(), .actual.lane())]
+    SpendingCredentialInvalid {
+        expected: SpendingCounter,
+        actual: SpendingCounter,
+    },
     #[error("Value calculation failed")]
     ValueError(#[from] ValueError),
 }

chain-impl-mockchain/src/accounting/account/spending.rs

@@ -53,7 +53,10 @@ impl SpendingCounterIncreasing {
         let actual_counter = self.nexts[counter.lane()];
 
         if actual_counter != counter {
-            Err(LedgerError::SpendingCredentialInvalid)
+            Err(LedgerError::SpendingCredentialInvalid {
+                expected: actual_counter,
+                actual: counter,
+            })
         } else {
             self.nexts[counter.lane()] = actual_counter.increment();
             Ok(())

chain-impl-mockchain/src/ledger/tests/macros.rs

@@ -29,6 +29,7 @@ macro_rules! assert_err {
 //
 // succeed if Expression's value a Err(E) where E match the ExpectedErrorPattern,
 // otherwise panic!() with some diagnostic
+#[allow(unused_macros)]
 macro_rules! assert_err_match {
     ($left: pat, $right: expr) => {
         match &($right) {

chain-impl-mockchain/src/ledger/tests/transaction_tests.rs

@@ -1,7 +1,7 @@
 #![cfg(test)]
 
 use crate::{
-    accounting::account::LedgerError::NonExistent,
+    accounting::account::{LedgerError::NonExistent, SpendingCounter},
     date::BlockDate,
     ledger::{
         self,
@@ -129,12 +129,15 @@ pub fn duplicated_account_transaction() {
 
     match result {
         Err(err) => panic!("first transaction should be succesful but {}", err),
-        Ok(_) => {
-            assert_err_match!(
-                ledger::Error::Account(crate::account::LedgerError::SpendingCredentialInvalid),
-                test_ledger.apply_transaction(fragment2, BlockDate::first())
-            );
-        }
+        Ok(_) => match test_ledger.apply_transaction(fragment2, BlockDate::first()) {
+            Err(ledger::Error::Account(
+                crate::account::LedgerError::SpendingCredentialInvalid { expected, actual },
+            )) => {
+                assert_eq!(expected, SpendingCounter::zero().increment());
+                assert_eq!(actual, SpendingCounter::zero());
+            }
+            _ => panic!("duplicated transaction should fail spending counter validation"),
+        },
     }
 }