feat: test tracer (#6025)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

book/cli/reth/init.md

@@ -56,37 +56,56 @@ Database:
           - extra:   Enables logging for extra debug-level messages
 
 Logging:
+      --log.stdout.format <FORMAT>
+          The format to use for logs written to stdout.
+
+          [default: terminal]
+
+          Possible values:
+          - json
+          - logfmt
+          - terminal
+
+      --log.stdout.filter <FILTER>
+          The filter to use for logs written to stdout.
+
+          [default: info]
+
       --log.file.directory <PATH>
           The path to put log files in
-          
           [default: <CACHE_DIR>/logs]
 
       --log.file.max-size <SIZE>
           The maximum size (in MB) of one log file
-          
           [default: 200]
 
       --log.file.max-files <COUNT>
           The maximum amount of log files that will be stored. If set to 0, background file logging is disabled
-          
           [default: 5]
 
       --log.file.filter <FILTER>
           The filter to use for logs written to the log file
-          
           [default: debug]
 
+      --log.file.format <FORMAT>
+          The format to use for logs written to the log file.
+
+          [default: Terminal]
+
+          Possible values:
+          - json
+          - logfmt
+          - terminal
+
       --log.journald
           Write logs to journald
 
       --log.journald.filter <FILTER>
           The filter to use for logs written to journald
-          
           [default: error]
 
       --color <COLOR>
           Sets whether or not the formatter emits ANSI terminal escape codes for colors and other text formatting
-          
           [default: always]
 
           Possible values:
@@ -97,7 +116,6 @@ Logging:
 Display:
   -v, --verbosity...
           Set the minimum log level.
-          
           -v      Errors
           -vv     Warnings
           -vvv    Info

crates/net/network/src/session/active.rs

@@ -12,7 +12,6 @@ use crate::{
 use core::sync::atomic::Ordering;
 use fnv::FnvHashMap;
 use futures::{stream::Fuse, SinkExt, StreamExt};
-
 use reth_eth_wire::{
     capability::Capabilities,
     errors::{EthHandshakeError, EthStreamError, P2PStreamError},

crates/net/network/src/transactions.rs

@@ -1292,10 +1292,10 @@ mod tests {
     use reth_network_api::NetworkInfo;
     use reth_primitives::hex;
     use reth_provider::test_utils::NoopProvider;
+
     use reth_transaction_pool::test_utils::{testing_pool, MockTransaction};
     use secp256k1::SecretKey;
     use std::future::poll_fn;
-
     #[tokio::test(flavor = "multi_thread")]
     async fn test_ignored_tx_broadcasts_while_initially_syncing() {
         reth_tracing::init_test_tracing();

crates/net/network/tests/it/big_pooled_txs_req.rs

@@ -12,7 +12,6 @@ use reth_transaction_pool::{
     TransactionPool,
 };
 use tokio::sync::oneshot;
-
 // peer0: `GetPooledTransactions` requestor
 // peer1: `GetPooledTransactions` responder
 #[tokio::test(flavor = "multi_thread")]

crates/net/network/tests/it/connect.rs

@@ -21,7 +21,6 @@ use reth_transaction_pool::test_utils::testing_pool;
 use secp256k1::SecretKey;
 use std::{collections::HashSet, net::SocketAddr, time::Duration};
 use tokio::task;
-
 #[tokio::test(flavor = "multi_thread")]
 async fn test_establish_connections() {
     reth_tracing::init_test_tracing();

crates/net/network/tests/it/geth.rs

@@ -13,7 +13,6 @@ use reth_primitives::{ChainSpec, Genesis, PeerId, SealedHeader};
 use reth_provider::test_utils::NoopProvider;
 use secp256k1::SecretKey;
 use std::{net::SocketAddr, sync::Arc};
-
 #[tokio::test(flavor = "multi_thread")]
 #[cfg_attr(not(feature = "geth-tests"), ignore)]
 async fn can_peer_with_geth() {

crates/net/network/tests/it/txgossip.rs

@@ -5,7 +5,6 @@ use reth_network::test_utils::Testnet;
 use reth_primitives::U256;
 use reth_provider::test_utils::{ExtendedAccount, MockEthProvider};
 use reth_transaction_pool::{test_utils::TransactionGenerator, PoolTransaction, TransactionPool};
-
 #[tokio::test(flavor = "multi_thread")]
 async fn test_tx_gossip() {
     reth_tracing::init_test_tracing();

crates/tracing/src/lib.rs

@@ -42,7 +42,7 @@
 )]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 
-use tracing_subscriber::{filter::Directive, EnvFilter};
+use tracing_subscriber::filter::Directive;
 
 // Re-export tracing crates
 pub use tracing;
@@ -52,8 +52,11 @@ pub use tracing_subscriber;
 pub use formatter::LogFormat;
 pub use layers::{FileInfo, FileWorkerGuard};
 
+pub use test_tracer::TestTracer;
+
 mod formatter;
 mod layers;
+mod test_tracer;
 
 use crate::layers::Layers;
 use tracing::level_filters::LevelFilter;
@@ -223,8 +226,5 @@ impl Tracer for RethTracer {
 ///
 ///  The subscriber will silently fail if it could not be installed.
 pub fn init_test_tracing() {
-    let _ = tracing_subscriber::fmt()
-        .with_env_filter(EnvFilter::from_default_env())
-        .with_writer(std::io::stderr)
-        .try_init();
+    let _ = TestTracer::default().init();
 }

crates/tracing/src/test_tracer.rs

@@ -0,0 +1,25 @@
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_subscriber::EnvFilter;
+
+use crate::Tracer;
+
+///  Initializes a tracing subscriber for tests.
+///
+///  The filter is configurable via `RUST_LOG`.
+///
+///  # Note
+///
+///  The subscriber will silently fail if it could not be installed.
+#[derive(Debug, Clone, Default)]
+#[non_exhaustive]
+pub struct TestTracer;
+
+impl Tracer for TestTracer {
+    fn init(self) -> eyre::Result<Option<WorkerGuard>> {
+        let _ = tracing_subscriber::fmt()
+            .with_env_filter(EnvFilter::from_default_env())
+            .with_writer(std::io::stderr)
+            .try_init();
+        Ok(None)
+    }
+}