chore(test): ignore test module in coverage

- ignore `canonical_task.rs` test module in coverage.
- reuse `canonical_view` in `test_tx_graph_conflicts.rs`

Author: oleonardolima

crates/chain/src/canonical_task.rs

@@ -440,6 +440,7 @@ impl<A: Clone> CanonicalReason<A> {
 }
 
 #[cfg(test)]
+#[cfg_attr(coverage_nightly, coverage(off))]
 mod tests {
     use super::*;
     use crate::local_chain::LocalChain;

crates/chain/tests/test_tx_graph_conflicts.rs

@@ -970,12 +970,13 @@ fn test_tx_conflict_handling() {
     for scenario in scenarios {
         let env = init_graph(scenario.tx_templates.iter());
 
-        let txs = local_chain
-            .canonical_view(
-                &env.tx_graph,
-                chain_tip,
-                env.canonicalization_params.clone(),
-            )
+        let canonical_view = local_chain.canonical_view(
+            &env.tx_graph,
+            chain_tip,
+            env.canonicalization_params.clone(),
+        );
+
+        let txs = canonical_view
             .txs()
             .map(|tx| tx.txid)
             .collect::<BTreeSet<_>>();
@@ -990,12 +991,7 @@ fn test_tx_conflict_handling() {
             scenario.name
         );
 
-        let txouts = local_chain
-            .canonical_view(
-                &env.tx_graph,
-                chain_tip,
-                env.canonicalization_params.clone(),
-            )
+        let txouts = canonical_view
             .filter_outpoints(env.indexer.outpoints().iter().cloned())
             .map(|(_, full_txout)| full_txout.outpoint)
             .collect::<BTreeSet<_>>();
@@ -1013,12 +1009,7 @@ fn test_tx_conflict_handling() {
             scenario.name
         );
 
-        let utxos = local_chain
-            .canonical_view(
-                &env.tx_graph,
-                chain_tip,
-                env.canonicalization_params.clone(),
-            )
+        let utxos = canonical_view
             .filter_unspent_outpoints(env.indexer.outpoints().iter().cloned())
             .map(|(_, full_txout)| full_txout.outpoint)
             .collect::<BTreeSet<_>>();
@@ -1036,21 +1027,15 @@ fn test_tx_conflict_handling() {
             scenario.name
         );
 
-        let balance = local_chain
-            .canonical_view(
-                &env.tx_graph,
-                chain_tip,
-                env.canonicalization_params.clone(),
-            )
-            .balance(
-                env.indexer.outpoints().iter().cloned(),
-                |_, txout| {
-                    env.indexer
-                        .index_of_spk(txout.txout.script_pubkey.as_script())
-                        .is_some()
-                },
-                0,
-            );
+        let balance = canonical_view.balance(
+            env.indexer.outpoints().iter().cloned(),
+            |_, txout| {
+                env.indexer
+                    .index_of_spk(txout.txout.script_pubkey.as_script())
+                    .is_some()
+            },
+            0,
+        );
         assert_eq!(
             balance, scenario.exp_balance,
             "\n[{}] 'balance' failed",