story-kit: merge 105_story_test_coverage_io_shell_rs_to_95

server/src/io/shell.rs

@@ -121,4 +121,69 @@ mod tests {
         assert_ne!(result.exit_code, 0);
         assert!(!result.stderr.is_empty());
     }
+
+    #[tokio::test]
+    async fn exec_shell_delegates_to_impl_via_state() {
+        let dir = tempdir().unwrap();
+        std::fs::write(dir.path().join("marker.txt"), "hello").unwrap();
+
+        let state = SessionState::default();
+        *state.project_root.lock().unwrap() = Some(dir.path().to_path_buf());
+
+        let result = exec_shell("ls".to_string(), Vec::new(), &state)
+            .await
+            .unwrap();
+
+        assert_eq!(result.exit_code, 0);
+        assert!(result.stdout.contains("marker.txt"));
+    }
+
+    #[tokio::test]
+    async fn exec_shell_errors_when_no_project_root() {
+        let state = SessionState::default();
+
+        let result = exec_shell("ls".to_string(), Vec::new(), &state).await;
+
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("No project"));
+    }
+
+    #[tokio::test]
+    async fn exec_shell_impl_errors_on_nonexistent_cwd() {
+        let result = exec_shell_impl(
+            "ls".to_string(),
+            Vec::new(),
+            PathBuf::from("/nonexistent_dir_that_does_not_exist_xyz"),
+        )
+        .await;
+
+        assert!(result.is_err());
+        assert!(result.unwrap_err().contains("Failed to execute command"));
+    }
+
+    #[test]
+    fn command_output_serializes_to_json() {
+        let output = CommandOutput {
+            stdout: "hello".to_string(),
+            stderr: "".to_string(),
+            exit_code: 0,
+        };
+
+        let json = serde_json::to_string(&output).unwrap();
+        assert!(json.contains("\"stdout\":\"hello\""));
+        assert!(json.contains("\"exit_code\":0"));
+    }
+
+    #[test]
+    fn command_output_debug_format() {
+        let output = CommandOutput {
+            stdout: "out".to_string(),
+            stderr: "err".to_string(),
+            exit_code: 1,
+        };
+
+        let debug = format!("{:?}", output);
+        assert!(debug.contains("CommandOutput"));
+        assert!(debug.contains("out"));
+    }
 }