Add Rust CLI test

codex-rs/exec/tests/tool_invocation.rs

@@ -0,0 +1,29 @@
+#![allow(clippy::unwrap_used, clippy::expect_used)]
+
+use codex_core::exec::{ExecParams, SandboxType, process_exec_tool_call};
+use codex_core::protocol::SandboxPolicy;
+use std::collections::HashMap;
+use std::sync::Arc;
+use tokio::sync::Notify;
+
+#[tokio::test]
+async fn echo_command_outputs_text() {
+    let params = ExecParams {
+        command: vec!["echo".into(), "Hello".into()],
+        cwd: std::env::current_dir().unwrap(),
+        timeout_ms: None,
+        env: HashMap::new(),
+    };
+    let policy = SandboxPolicy::new_workspace_write_policy();
+    let output = process_exec_tool_call(
+        params,
+        SandboxType::None,
+        Arc::new(Notify::new()),
+        &policy,
+        &None,
+    )
+    .await
+    .expect("exec failed");
+    assert_eq!(output.exit_code, 0);
+    assert!(output.stdout.contains("Hello"));
+}