sessions : am sessions --resume <id> (issue #32) - relance en arriere-plan avec les arguments et le cwd d'origine, cwd optionnel dans spawn_background, gardes running/repl/erreurs claires

tests/process_test.rs

@@ -31,6 +31,7 @@ fn spawn_detect_stop_cycle() {
         std::path::Path::new(prog),
         &args,
         &env,
+        None,
     )
     .unwrap();
     assert!(pid > 0);
@@ -57,6 +58,7 @@ fn spawning_a_failing_program_reports_an_error() {
         std::path::Path::new(prog),
         &args,
         &env,
+        None,
     )
     .unwrap_err();
     assert!(

tests/sessions_test.rs

@@ -58,16 +58,33 @@ fn agent_session_roundtrip_and_counter() {
 fn command_lists_sessions() {
     let app = common::test_app("sesscmd", &["sessions"]);
     sessions::start_agent(&app, "aider", 4242, None, None, vec![], vec![], None).unwrap();
-    let code = sessions_cmd::run(&app, None, None, None, None).unwrap();
+    let code = sessions_cmd::run(&app, None, None, None, None, None).unwrap();
     assert_eq!(code, 0);
     // --json path returns the row set without error.
     sessions::finish_agent(&app, "aider", Some(4242), 0, true).unwrap();
 }
 
+#[test]
+fn resume_unknown_or_repl_session_errors() {
+    let app = common::test_app("resume", &["sessions"]);
+    assert!(sessions_cmd::run(&app, None, None, None, None, Some("inconnue")).is_err());
+    sessions::start_repl(&app, "r1", None).unwrap();
+    assert!(sessions_cmd::run(&app, None, None, None, None, Some("r1")).is_err());
+}
+
+#[test]
+fn resume_dry_run_announces() {
+    let app = common::test_app("resumedry", &["sessions", "--dry-run"]);
+    let id = sessions::start_agent(&app, "claude-code", 4242, None, None, vec![], vec![], None).unwrap();
+    sessions::finish_agent(&app, "claude-code", Some(4242), 0, true).unwrap();
+    let code = sessions_cmd::run(&app, None, None, None, None, Some(&id)).unwrap();
+    assert_eq!(code, 0, "dry-run resume");
+}
+
 #[test]
 fn show_one_accepts_known_id() {
     let app = common::test_app("sessshow", &["sessions"]);
     let id = sessions::start_agent(&app, "jcode", 99, None, None, vec![], vec![], None).unwrap();
-    let code = sessions_cmd::run(&app, None, None, None, Some(&id)).unwrap();
+    let code = sessions_cmd::run(&app, None, None, None, Some(&id), None).unwrap();
     assert_eq!(code, 0);
 }