[router] add common ut infra to mock worker and app (#8295)

sgl-router/Cargo.toml

@@ -42,6 +42,9 @@ url = "2.5.4"
 
 [dev-dependencies]
 criterion = { version = "0.5", features = ["html_reports"] }
+tokio-stream = "0.1"
+actix-http = "3.0"
+futures = "0.3"
 
 [[bench]]
 name = "request_processing"

sgl-router/tests/common/mod.rs

+pub mod mock_worker;
+
+use actix_web::web;
+use reqwest::Client;
+use sglang_router_rs::config::{PolicyConfig, RouterConfig, RoutingMode};
+use sglang_router_rs::server::AppState;
+
+/// Helper function to create test router configuration
+pub fn create_test_config(worker_urls: Vec<String>) -> RouterConfig {
+    RouterConfig {
+        mode: RoutingMode::Regular { worker_urls },
+        policy: PolicyConfig::Random,
+        host: "127.0.0.1".to_string(),
+        port: 3001,
+        max_payload_size: 256 * 1024 * 1024, // 256MB
+        request_timeout_secs: 600,
+        worker_startup_timeout_secs: 300,
+        worker_startup_check_interval_secs: 10,
+        discovery: None,
+        metrics: None,
+        log_dir: None,
+        log_level: None,
+    }
+}
+
+/// Helper function to create test router configuration with no health check
+pub fn create_test_config_no_workers() -> RouterConfig {
+    RouterConfig {
+        mode: RoutingMode::Regular {
+            worker_urls: vec![],
+        }, // Empty to skip health check
+        policy: PolicyConfig::Random,
+        host: "127.0.0.1".to_string(),
+        port: 3001,
+        max_payload_size: 256 * 1024 * 1024, // 256MB
+        request_timeout_secs: 600,
+        worker_startup_timeout_secs: 0, // No wait
+        worker_startup_check_interval_secs: 10,
+        discovery: None,
+        metrics: None,
+        log_dir: None,
+        log_level: None,
+    }
+}
+
+/// Helper function to create test app state
+pub async fn create_test_app_state(config: RouterConfig) -> Result<web::Data<AppState>, String> {
+    // Create a non-blocking client
+    let client = Client::builder()
+        .timeout(std::time::Duration::from_secs(config.request_timeout_secs))
+        .build()
+        .map_err(|e| e.to_string())?;
+
+    let app_state = AppState::new(config, client)?;
+    Ok(web::Data::new(app_state))
+}