first user prompt submit test added

Author: ekang7

crates/agent/tests/test_hooks.rs

@@ -34,7 +34,7 @@ async fn test_agent_spawn_hook_single() {
     let _ = tracing_subscriber::fmt::try_init();
 
     let mut test: TestCase = TestCase::builder()
-        .test_name("agent spawn hook behavior")
+        .test_name("agent spawn hook behavior for single shell command and one turn")
         .with_agent_config(create_spawn_hook_single_shell_config())
         .with_responses(
             parse_response_streams(include_str!("./mock_responses/simple_two_turn.jsonl"))
@@ -58,7 +58,7 @@ async fn test_agent_spawn_hook_persistence() {
     let _ = tracing_subscriber::fmt::try_init();
 
     let mut test: TestCase = TestCase::builder()
-        .test_name("agent spawn hook behavior")
+        .test_name("agent spawn hook behavior for single shell command and two turns")
         .with_agent_config(create_spawn_hook_single_shell_config())
         .with_responses(
             parse_response_streams(include_str!("./mock_responses/simple_two_turn.jsonl"))
@@ -79,3 +79,45 @@ async fn test_agent_spawn_hook_persistence() {
         assert_contains(&first_msg, "Agent initialized");
     }
 }
+
+#[tokio::test]
+async fn test_user_prompt_hook_single() {
+    let _ = tracing_subscriber::fmt::try_init();
+    let hooks = HashMap::from([
+        (
+            HookTrigger::UserPromptSubmit,
+            vec![HookConfig::ShellCommand(CommandHook {
+                command: "echo 'submitted!'".to_string(),
+                opts: BaseHookConfig {
+                    timeout_ms: 5000,
+                    max_output_size: 1024,
+                    cache_ttl_seconds: 0,
+                    matcher: None,
+                },
+            })],
+        ),
+    ]);
+
+    let agent_config = AgentConfig::V2025_08_22(AgentConfigV2025_08_22 {
+        hooks,
+        ..Default::default()
+    });
+    let mut test: TestCase = TestCase::builder()
+        .test_name("user prompt submit hook behavior for single shell command and one turn")
+        .with_agent_config(agent_config)
+        .with_responses(
+            parse_response_streams(include_str!("./mock_responses/simple_two_turn.jsonl"))
+                .await
+                .unwrap(),
+        )
+        .build()
+        .await
+        .unwrap();
+    
+    test.wait_until_agent_initializes(Duration::from_millis(100)).await;
+    test.send_prompt("hello".to_string()).await;
+    test.wait_until_agent_stop(Duration::from_millis(100)).await;
+    let req = test.requests().first().expect("should have one request");
+    let first_msg = req.messages().first().expect("first message should exist").text(); 
+    assert_contains(&first_msg, "submitted!");
+}