Add non_sandbox_test helper (#3880)

Makes tests shorter

codex-rs/mcp-server/tests/suite/interrupt.rs

@@ -4,7 +4,6 @@
 use std::path::Path;
 
 use codex_core::protocol::TurnAbortReason;
-use codex_core::spawn::CODEX_SANDBOX_NETWORK_DISABLED_ENV_VAR;
 use codex_protocol::mcp_protocol::AddConversationListenerParams;
 use codex_protocol::mcp_protocol::InterruptConversationParams;
 use codex_protocol::mcp_protocol::InterruptConversationResponse;
@@ -12,6 +11,7 @@ use codex_protocol::mcp_protocol::NewConversationParams;
 use codex_protocol::mcp_protocol::NewConversationResponse;
 use codex_protocol::mcp_protocol::SendUserMessageParams;
 use codex_protocol::mcp_protocol::SendUserMessageResponse;
+use core_test_support::non_sandbox_test;
 use mcp_types::JSONRPCResponse;
 use mcp_types::RequestId;
 use tempfile::TempDir;
@@ -26,12 +26,7 @@ const DEFAULT_READ_TIMEOUT: std::time::Duration = std::time::Duration::from_secs
 
 #[tokio::test(flavor = "multi_thread", worker_threads = 2)]
 async fn test_shell_command_interruption() {
-    if std::env::var(CODEX_SANDBOX_NETWORK_DISABLED_ENV_VAR).is_ok() {
-        println!(
-            "Skipping test because it cannot execute when network is disabled in a Codex sandbox."
-        );
-        return;
-    }
+    non_sandbox_test!();
 
     if let Err(err) = shell_command_interruption().await {
         panic!("failure: {err}");