dev: improve failing tests logging (#544)

* improve failing tests logging

* Add log4rs

* trunk fmt

.gitignore

@@ -19,3 +19,6 @@ broadcast
 
 # Ignore compiled Kakarot contracts
 lib/kakarot
+
+# Ignore failing tests log
+failing_tests.log

Cargo.toml

@@ -59,6 +59,10 @@ serde = { version = "1.0.188", features = ["derive"] }
 serde_json = "1.0"
 serde_yaml = "0.9.25"
 
+# Log
+log = "0.4.20"
+log4rs = "1.2.0"
+
 [patch."https://github.com/ethereum/c-kzg-4844"]
 c-kzg = { git = "https://github.com/rjected/c-kzg-4844", branch = "dan/add-serde-feature" }
 

crates/ef-testing/Cargo.toml

@@ -27,6 +27,10 @@ cairo-vm = { workspace = true }
 starknet_api = { workspace = true }
 starknet = { workspace = true }
 
+# Log
+log = { workspace = true }
+log4rs = { workspace = true }
+
 # Other
 async-trait = { workspace = true }
 ctor = { workspace = true }

crates/ef-testing/src/models/result.rs

@@ -57,7 +57,7 @@ pub(crate) fn print_results(failed: &[&CaseResult]) {
     for case in failed {
         match &case.result {
             Ok(_) => unreachable!(),
-            Err(err) => println!("[!] Case {} failed:\n{}", case.path.display(), err,),
+            Err(err) => log::error!("[!] Case {} failed:\n{}", case.path.display(), err,),
         }
     }
 }

crates/ef-testing/tests/tests.rs

@@ -13,6 +13,9 @@ fn setup() {
         let subscriber = FmtSubscriber::builder().with_env_filter(filter).finish();
         tracing::subscriber::set_global_default(subscriber)
             .expect("setting tracing default failed");
+
+        // Set-up log4rs
+        log4rs::init_file("../../log4rs.yml", Default::default()).unwrap();
     })
 }
 

log4rs.yml

@@ -0,0 +1,30 @@
+refresh_rate: 30 seconds
+
+appenders:
+  stdout:
+    kind: console
+
+  failing_tests:
+    kind: rolling_file
+    path: ../../failing_tests.log
+    append: true
+    encoder:
+      pattern: "{m}{n}"
+    policy:
+      kind: compound
+      trigger:
+        kind: size
+        limit: 10 mb
+      roller:
+        kind: delete
+
+root:
+  level: info
+  appenders:
+    - stdout
+
+loggers:
+  ef_testing::models::result:
+    level: error
+    appenders:
+      - failing_tests