Marginally optimize test logging

973636b introduced a new `HashMap`
in the `TestLogger` but then did lookups by iterating the entire
map. This fixes that, and also takes this opportunity to stop
allocating new `String`s for the module to store each log entry in
the `TestLogger`

Author: TheBlueMatt

lightning-background-processor/src/lib.rs

@@ -1375,9 +1375,9 @@ mod tests {
 			let desired_log_1 = "Calling ChannelManager's timer_tick_occurred".to_string();
 			let desired_log_2 = "Calling PeerManager's timer_tick_occurred".to_string();
 			let desired_log_3 = "Rebroadcasting monitor's pending claims".to_string();
-			if log_entries.get(&("lightning_background_processor".to_string(), desired_log_1)).is_some() &&
-				log_entries.get(&("lightning_background_processor".to_string(), desired_log_2)).is_some() &&
-				log_entries.get(&("lightning_background_processor".to_string(), desired_log_3)).is_some() {
+			if log_entries.get(&("lightning_background_processor", desired_log_1)).is_some() &&
+				log_entries.get(&("lightning_background_processor", desired_log_2)).is_some() &&
+				log_entries.get(&("lightning_background_processor", desired_log_3)).is_some() {
 				break
 			}
 		}
@@ -1556,7 +1556,7 @@ mod tests {
 		loop {
 			let log_entries = nodes[0].logger.lines.lock().unwrap();
 			let expected_log = "Persisting scorer".to_string();
-			if log_entries.get(&("lightning_background_processor".to_string(), expected_log)).is_some() {
+			if log_entries.get(&("lightning_background_processor", expected_log)).is_some() {
 				break
 			}
 		}
@@ -1580,7 +1580,7 @@ mod tests {
 				$sleep;
 				let log_entries = $nodes[0].logger.lines.lock().unwrap();
 				let loop_counter = "Calling ChannelManager's timer_tick_occurred".to_string();
-				if *log_entries.get(&("lightning_background_processor".to_string(), loop_counter))
+				if *log_entries.get(&("lightning_background_processor", loop_counter))
 					.unwrap_or(&0) > 1
 				{
 					// Wait until the loop has gone around at least twice.
@@ -1792,7 +1792,7 @@ mod tests {
 
 		let log_entries = nodes[0].logger.lines.lock().unwrap();
 		let expected_log = "Persisting scorer after update".to_string();
-		assert_eq!(*log_entries.get(&("lightning_background_processor".to_string(), expected_log)).unwrap(), 5);
+		assert_eq!(*log_entries.get(&("lightning_background_processor", expected_log)).unwrap(), 5);
 	}
 
 	#[tokio::test]

lightning/src/ln/functional_tests.rs

@@ -693,7 +693,7 @@ fn test_update_fee_that_funder_cannot_afford() {
 		*feerate_lock += 4;
 	}
 	nodes[0].node.timer_tick_occurred();
-	nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Cannot afford to send new feerate at {}", feerate + 4), 1);
+	nodes[0].logger.assert_log("lightning::ln::channel", format!("Cannot afford to send new feerate at {}", feerate + 4), 1);
 	check_added_monitors!(nodes[0], 0);
 
 	const INITIAL_COMMITMENT_NUMBER: u64 = 281474976710654;
@@ -768,7 +768,7 @@ fn test_update_fee_that_funder_cannot_afford() {
 	//check to see if the funder, who sent the update_fee request, can afford the new fee (funder_balance >= fee+channel_reserve)
 	//Should produce and error.
 	nodes[1].node.handle_commitment_signed(&nodes[0].node.get_our_node_id(), &commit_signed_msg);
-	nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Funding remote cannot afford proposed new fee".to_string(), 1);
+	nodes[1].logger.assert_log("lightning::ln::channelmanager", "Funding remote cannot afford proposed new fee".to_string(), 1);
 	check_added_monitors!(nodes[1], 1);
 	check_closed_broadcast!(nodes[1], true);
 	check_closed_event!(nodes[1], 1, ClosureReason::ProcessingError { err: String::from("Funding remote cannot afford proposed new fee") },
@@ -1529,7 +1529,7 @@ fn test_fee_spike_violation_fails_htlc() {
 		},
 		_ => panic!("Unexpected event"),
 	};
-	nodes[1].logger.assert_log("lightning::ln::channel".to_string(),
+	nodes[1].logger.assert_log("lightning::ln::channel",
 		format!("Attempting to fail HTLC due to fee spike buffer violation in channel {}. Rebalancing is required.", raa_msg.channel_id), 1);
 
 	check_added_monitors!(nodes[1], 2);
@@ -1617,7 +1617,7 @@ fn test_chan_reserve_violation_inbound_htlc_outbound_channel() {
 
 	nodes[0].node.handle_update_add_htlc(&nodes[1].node.get_our_node_id(), &msg);
 	// Check that the payment failed and the channel is closed in response to the malicious UpdateAdd.
-	nodes[0].logger.assert_log("lightning::ln::channelmanager".to_string(), "Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_string(), 1);
+	nodes[0].logger.assert_log("lightning::ln::channelmanager", "Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value".to_string(), 1);
 	assert_eq!(nodes[0].node.list_channels().len(), 0);
 	let err_msg = check_closed_broadcast!(nodes[0], true).unwrap();
 	assert_eq!(err_msg.data, "Cannot accept HTLC that would put our balance under counterparty-announced channel reserve value");
@@ -1796,7 +1796,7 @@ fn test_chan_reserve_violation_inbound_htlc_inbound_chan() {
 
 	nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &msg);
 	// Check that the payment failed and the channel is closed in response to the malicious UpdateAdd.
-	nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Remote HTLC add would put them under remote reserve value".to_string(), 1);
+	nodes[1].logger.assert_log("lightning::ln::channelmanager", "Remote HTLC add would put them under remote reserve value".to_string(), 1);
 	assert_eq!(nodes[1].node.list_channels().len(), 1);
 	let err_msg = check_closed_broadcast!(nodes[1], true).unwrap();
 	assert_eq!(err_msg.data, "Remote HTLC add would put them under remote reserve value");
@@ -5930,7 +5930,7 @@ fn test_fail_holding_cell_htlc_upon_free() {
 	// us to surface its failure to the user.
 	chan_stat = get_channel_value_stat!(nodes[0], nodes[1], chan.2);
 	assert_eq!(chan_stat.holding_cell_outbound_amount_msat, 0);
-	nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Freeing holding cell with 1 HTLC updates in channel {}", chan.2), 1);
+	nodes[0].logger.assert_log("lightning::ln::channel", format!("Freeing holding cell with 1 HTLC updates in channel {}", chan.2), 1);
 
 	// Check that the payment failed to be sent out.
 	let events = nodes[0].node.get_and_clear_pending_events();
@@ -6018,7 +6018,7 @@ fn test_free_and_fail_holding_cell_htlcs() {
 	// to surface its failure to the user. The first payment should succeed.
 	chan_stat = get_channel_value_stat!(nodes[0], nodes[1], chan.2);
 	assert_eq!(chan_stat.holding_cell_outbound_amount_msat, 0);
-	nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Freeing holding cell with 2 HTLC updates in channel {}", chan.2), 1);
+	nodes[0].logger.assert_log("lightning::ln::channel", format!("Freeing holding cell with 2 HTLC updates in channel {}", chan.2), 1);
 
 	// Check that the second payment failed to be sent out.
 	let events = nodes[0].node.get_and_clear_pending_events();
@@ -6292,7 +6292,7 @@ fn test_update_add_htlc_bolt2_receiver_zero_value_msat() {
 	updates.update_add_htlcs[0].amount_msat = 0;
 
 	nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &updates.update_add_htlcs[0]);
-	nodes[1].logger.assert_log("lightning::ln::channelmanager".to_string(), "Remote side tried to send a 0-msat HTLC".to_string(), 1);
+	nodes[1].logger.assert_log("lightning::ln::channelmanager", "Remote side tried to send a 0-msat HTLC".to_string(), 1);
 	check_closed_broadcast!(nodes[1], true).unwrap();
 	check_added_monitors!(nodes[1], 1);
 	check_closed_event!(nodes[1], 1, ClosureReason::ProcessingError { err: "Remote side tried to send a 0-msat HTLC".to_string() },
@@ -9843,10 +9843,10 @@ fn do_test_max_dust_htlc_exposure(dust_outbound_balance: bool, exposure_breach_e
 			// Outbound dust balance: 6399 sats
 			let dust_inbound_overflow = dust_inbound_htlc_on_holder_tx_msat * (dust_inbound_htlc_on_holder_tx + 1);
 			let dust_outbound_overflow = dust_outbound_htlc_on_holder_tx_msat * dust_outbound_htlc_on_holder_tx + dust_inbound_htlc_on_holder_tx_msat;
-			nodes[0].logger.assert_log("lightning::ln::channel".to_string(), format!("Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx", if dust_outbound_balance { dust_outbound_overflow } else { dust_inbound_overflow }, max_dust_htlc_exposure_msat), 1);
+			nodes[0].logger.assert_log("lightning::ln::channel", format!("Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx", if dust_outbound_balance { dust_outbound_overflow } else { dust_inbound_overflow }, max_dust_htlc_exposure_msat), 1);
 		} else {
 			// Outbound dust balance: 5200 sats
-			nodes[0].logger.assert_log("lightning::ln::channel".to_string(),
+			nodes[0].logger.assert_log("lightning::ln::channel",
 				format!("Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx",
 					dust_htlc_on_counterparty_tx_msat * (dust_htlc_on_counterparty_tx - 1) + dust_htlc_on_counterparty_tx_msat + 4,
 					max_dust_htlc_exposure_msat), 1);

lightning/src/util/test_utils.rs

@@ -930,8 +930,8 @@ impl events::MessageSendEventsProvider for TestRoutingMessageHandler {
 pub struct TestLogger {
 	level: Level,
 	pub(crate) id: String,
-	pub lines: Mutex<HashMap<(String, String), usize>>,
-	pub context: Mutex<HashMap<(String, Option<PublicKey>, Option<ChannelId>), usize>>,
+	pub lines: Mutex<HashMap<(&'static str, String), usize>>,
+	pub context: Mutex<HashMap<(&'static str, Option<PublicKey>, Option<ChannelId>), usize>>,
 }
 
 impl TestLogger {
@@ -949,7 +949,7 @@ impl TestLogger {
 	pub fn enable(&mut self, level: Level) {
 		self.level = level;
 	}
-	pub fn assert_log(&self, module: String, line: String, count: usize) {
+	pub fn assert_log(&self, module: &str, line: String, count: usize) {
 		let log_entries = self.lines.lock().unwrap();
 		assert_eq!(log_entries.get(&(module, line)), Some(&count));
 	}
@@ -961,7 +961,7 @@ impl TestLogger {
 	pub fn assert_log_contains(&self, module: &str, line: &str, count: usize) {
 		let log_entries = self.lines.lock().unwrap();
 		let l: usize = log_entries.iter().filter(|&(&(ref m, ref l), _c)| {
-			m == module && l.contains(line)
+			*m == module && l.contains(line)
 		}).map(|(_, c) | { c }).sum();
 		assert_eq!(l, count)
 	}
@@ -974,7 +974,7 @@ impl TestLogger {
 	pub fn assert_log_regex(&self, module: &str, pattern: regex::Regex, count: usize) {
 		let log_entries = self.lines.lock().unwrap();
 		let l: usize = log_entries.iter().filter(|&(&(ref m, ref l), _c)| {
-			m == module && pattern.is_match(&l)
+			*m == module && pattern.is_match(&l)
 		}).map(|(_, c) | { c }).sum();
 		assert_eq!(l, count)
 	}
@@ -983,18 +983,15 @@ impl TestLogger {
 		&self, module: &str, peer_id: Option<PublicKey>, channel_id: Option<ChannelId>, count: usize
 	) {
 		let context_entries = self.context.lock().unwrap();
-		let l: usize = context_entries.iter()
-			.filter(|&(&(ref m, ref p, ref c), _)| m == module && *p == peer_id && *c == channel_id)
-			.map(|(_, c) | c)
-			.sum();
-		assert_eq!(l, count)
+		let l = context_entries.get(&(module, peer_id, channel_id)).unwrap();
+		assert_eq!(*l, count)
 	}
 }
 
 impl Logger for TestLogger {
 	fn log(&self, record: Record) {
-		*self.lines.lock().unwrap().entry((record.module_path.to_string(), format!("{}", record.args))).or_insert(0) += 1;
-		*self.context.lock().unwrap().entry((record.module_path.to_string(), record.peer_id, record.channel_id)).or_insert(0) += 1;
+		*self.lines.lock().unwrap().entry((record.module_path, format!("{}", record.args))).or_insert(0) += 1;
+		*self.context.lock().unwrap().entry((record.module_path, record.peer_id, record.channel_id)).or_insert(0) += 1;
 		if record.level >= self.level {
 			#[cfg(all(not(ldk_bench), feature = "std"))] {
 				let pfx = format!("{} {} [{}:{}]", self.id, record.level.to_string(), record.module_path, record.line);