tests: add assertions for HTTP tracker error logs

It's using the info-hash to find the ERROR in logs. IT's generated a
newly random info-hash for each tests.

It could have been also used a `x-request-id` header in the HTTP request
but this solution is simpler and the chances to have an info-hash
collision is very low.

tests/common/fixtures.rs

@@ -1,3 +1,5 @@
+use bittorrent_primitives::info_hash::InfoHash;
+
 #[allow(dead_code)]
 pub fn invalid_info_hashes() -> Vec<String> {
     [
@@ -10,3 +12,11 @@ pub fn invalid_info_hashes() -> Vec<String> {
     ]
     .to_vec()
 }
+
+/// Returns a random info hash.
+pub fn random_info_hash() -> InfoHash {
+    let mut rng = rand::thread_rng();
+    let random_bytes: [u8; 20] = rand::Rng::gen(&mut rng);
+
+    InfoHash::from_bytes(&random_bytes)
+}

tests/servers/http/v1/contract.rs

@@ -1217,8 +1217,10 @@ mod configured_as_whitelisted {
 
         use bittorrent_primitives::info_hash::InfoHash;
         use torrust_tracker_test_helpers::configuration;
+        use uuid::Uuid;
 
-        use crate::common::logging::{self};
+        use crate::common::fixtures::random_info_hash;
+        use crate::common::logging::{self, logs_contains_a_line_with};
         use crate::servers::http::asserts::{assert_is_announce_response, assert_torrent_not_in_whitelist_error_response};
         use crate::servers::http::client::Client;
         use crate::servers::http::requests::announce::QueryBuilder;
@@ -1230,14 +1232,24 @@ mod configured_as_whitelisted {
 
             let env = Started::new(&configuration::ephemeral_listed().into()).await;
 
-            let info_hash = InfoHash::from_str("9c38422213e30bff212b30c360d26f9a02136422").unwrap();
+            let request_id = Uuid::new_v4();
+            let info_hash = random_info_hash();
 
             let response = Client::new(*env.bind_address())
-                .announce(&QueryBuilder::default().with_info_hash(&info_hash).query())
+                .announce_with_header(
+                    &QueryBuilder::default().with_info_hash(&info_hash).query(),
+                    "x-request-id",
+                    &request_id.to_string(),
+                )
                 .await;
 
             assert_torrent_not_in_whitelist_error_response(response).await;
 
+            assert!(
+                logs_contains_a_line_with(&["ERROR", &format!("{info_hash}"), "is not whitelisted"]),
+                "Expected logs to contain: ERROR ... {info_hash} is not whitelisted"
+            );
+
             env.stop().await;
         }
 
@@ -1272,7 +1284,8 @@ mod configured_as_whitelisted {
         use torrust_tracker_primitives::peer::fixture::PeerBuilder;
         use torrust_tracker_test_helpers::configuration;
 
-        use crate::common::logging::{self};
+        use crate::common::fixtures::random_info_hash;
+        use crate::common::logging::{self, logs_contains_a_line_with};
         use crate::servers::http::asserts::assert_scrape_response;
         use crate::servers::http::client::Client;
         use crate::servers::http::responses::scrape::{File, ResponseBuilder};
@@ -1284,7 +1297,7 @@ mod configured_as_whitelisted {
 
             let env = Started::new(&configuration::ephemeral_listed().into()).await;
 
-            let info_hash = InfoHash::from_str("9c38422213e30bff212b30c360d26f9a02136422").unwrap();
+            let info_hash = random_info_hash();
 
             env.add_torrent_peer(
                 &info_hash,
@@ -1306,6 +1319,11 @@ mod configured_as_whitelisted {
 
             assert_scrape_response(response, &expected_scrape_response).await;
 
+            assert!(
+                logs_contains_a_line_with(&["ERROR", &format!("{info_hash}"), "is not whitelisted"]),
+                "Expected logs to contain: ERROR ... {info_hash} is not whitelisted"
+            );
+
             env.stop().await;
         }