test(query_result): cluster state tests

Added tests around query response metadata:
1. initial test for cluster state (node addresses)
2. improved trace_info test with more detailed verification

based on:
com.datastax.oss.driver.core.metadata.MetadataIT
com.datastax.oss.driver.core.cql.QueryTraceIT

Author: soyacz

scylla/tests/integration/cluster_state_tests.rs

@@ -0,0 +1,30 @@
+use std::env;
+
+use hashbrown::HashSet;
+
+use crate::utils::{create_new_session_builder, setup_tracing};
+
+#[tokio::test]
+#[ntest::timeout(60000)]
+#[cfg(not(scylla_cloud_tests))]
+async fn test_session_should_have_metadata() {
+    setup_tracing();
+    let session = create_new_session_builder().build().await.unwrap();
+    let state = session.get_cluster_state();
+    let keys = ["SCYLLA_URI", "SCYLLA_URI2", "SCYLLA_URI3"];
+    let expected_addresses: HashSet<String> = keys
+        .iter()
+        .map(|key| env::var(key).unwrap_or_else(|_| panic!("{} not set", key)))
+        .collect();
+
+    let got_addresses: HashSet<String> = state
+        .get_nodes_info()
+        .iter()
+        .map(|node| node.address.to_string())
+        .collect();
+
+    assert_eq!(
+        got_addresses, expected_addresses,
+        "Cluster node addresses do not match environment variables"
+    );
+}

scylla/tests/integration/main.rs

@@ -1,5 +1,6 @@
 mod authenticate;
 mod batch;
+mod cluster_state_tests;
 mod consistency;
 mod cql_collections;
 mod cql_types;

scylla/tests/integration/session.rs

@@ -831,6 +831,32 @@ async fn test_get_tracing_info(session: &Session, ks: String) {
     let tracing_info: TracingInfo = session.get_tracing_info(&tracing_id).await.unwrap();
     assert!(!tracing_info.events.is_empty());
     assert!(!tracing_info.nodes().is_empty());
+
+    // Check if the request type matches
+    assert_eq!(tracing_info.request.unwrap(), "Execute CQL3 query");
+
+    // Verify duration is positive when Scylla is used
+    if session.get_cluster_state().get_nodes_info().first().unwrap().sharder().is_some() {
+        assert!(tracing_info.duration.unwrap() > 0);
+    }
+    // Verify started_at timestamp is present
+    assert!(tracing_info.started_at.unwrap().0 > 0);
+
+    // Check parameters
+    assert!(tracing_info
+        .parameters
+        .clone()
+        .unwrap()
+        .contains_key("consistency_level"));
+    assert!(tracing_info.parameters.unwrap().contains_key("query"));
+
+    // Check events
+    for event in tracing_info.events {
+        assert!(!event.activity.clone().unwrap().is_empty());
+        assert!(event.source.is_some());
+        assert!(event.source_elapsed.unwrap() >= 0);
+        assert!(!event.activity.unwrap().is_empty());
+    }
 }
 
 async fn test_tracing_query_iter(session: &Session, ks: String) {