test(admin): cover expand command dispatch

crates/cli/tests/admin_expand.rs

@@ -0,0 +1,166 @@
+#![cfg(not(windows))]
+
+use std::io::{Read, Write};
+use std::net::{TcpListener, TcpStream};
+use std::path::PathBuf;
+use std::process::Command;
+use std::sync::mpsc::{self, Receiver};
+use std::thread::{self, JoinHandle};
+use std::time::Duration;
+
+#[derive(Debug)]
+struct CapturedAdminRequest {
+    method: String,
+    target: String,
+}
+
+fn rc_binary() -> PathBuf {
+    if let Ok(path) = std::env::var("CARGO_BIN_EXE_rc") {
+        return PathBuf::from(path);
+    }
+
+    let workspace_root = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .expect("cli crate has parent directory")
+        .parent()
+        .expect("workspace root exists")
+        .to_path_buf();
+
+    let debug_binary = workspace_root.join("target/debug/rc");
+    if debug_binary.exists() {
+        return debug_binary;
+    }
+
+    workspace_root.join("target/release/rc")
+}
+
+fn read_admin_request(stream: &mut TcpStream) -> CapturedAdminRequest {
+    stream
+        .set_read_timeout(Some(Duration::from_secs(5)))
+        .expect("set read timeout");
+
+    let mut request = Vec::new();
+    let mut buffer = [0_u8; 8192];
+    loop {
+        let bytes_read = stream.read(&mut buffer).expect("read admin request");
+        if bytes_read == 0 {
+            break;
+        }
+        request.extend_from_slice(&buffer[..bytes_read]);
+        if request.windows(4).any(|window| window == b"\r\n\r\n") {
+            break;
+        }
+    }
+
+    let request = String::from_utf8(request).expect("admin request should be UTF-8");
+    let request_line = request.lines().next().expect("request line");
+    let mut parts = request_line.split_whitespace();
+    let method = parts.next().expect("request method").to_string();
+    let target = parts.next().expect("request target").to_string();
+
+    CapturedAdminRequest { method, target }
+}
+
+fn start_admin_test_server(
+    response_body: &'static str,
+) -> (String, Receiver<CapturedAdminRequest>, JoinHandle<()>) {
+    let listener = TcpListener::bind("127.0.0.1:0").expect("bind admin test server");
+    let endpoint = format!("http://{}", listener.local_addr().expect("server address"));
+    let (sender, receiver) = mpsc::channel();
+
+    let handle = thread::spawn(move || {
+        let (mut stream, _) = listener.accept().expect("accept admin request");
+        let request = read_admin_request(&mut stream);
+        sender.send(request).expect("send captured request");
+
+        let response = format!(
+            "HTTP/1.1 200 OK\r\ncontent-type: application/json\r\ncontent-length: {}\r\nconnection: close\r\n\r\n{}",
+            response_body.len(),
+            response_body
+        );
+        stream
+            .write_all(response.as_bytes())
+            .expect("write admin response");
+    });
+
+    (endpoint, receiver, handle)
+}
+
+fn rc_host_alias(endpoint: &str) -> String {
+    let (_, endpoint_authority) = endpoint.split_once("://").expect("endpoint has scheme");
+    format!("http://ACCESS_KEY:SECRET_KEY@{endpoint_authority}")
+}
+
+#[test]
+fn scale_start_dispatches_to_rebalance_start_with_expansion_json() {
+    let config_dir = tempfile::tempdir().expect("create config dir");
+    let (endpoint, receiver, handle) = start_admin_test_server(r#"{"id":"rebalance-123"}"#);
+
+    let output = Command::new(rc_binary())
+        .args(["--json", "admin", "scale", "start", "myalias"])
+        .env("RC_CONFIG_DIR", config_dir.path())
+        .env("RC_HOST_myalias", rc_host_alias(&endpoint))
+        .output()
+        .expect("run rc command");
+
+    assert!(
+        output.status.success(),
+        "stderr: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+
+    let stdout = String::from_utf8(output.stdout).expect("stdout should be UTF-8");
+    let payload: serde_json::Value = serde_json::from_str(&stdout).expect("JSON output");
+    assert_eq!(payload["success"], true);
+    assert_eq!(
+        payload["message"],
+        "Expansion rebalance started successfully"
+    );
+    assert_eq!(payload["target"], "myalias");
+    assert_eq!(payload["id"], "rebalance-123");
+
+    let request = receiver
+        .recv_timeout(Duration::from_secs(5))
+        .expect("captured admin request");
+    assert_eq!(request.method, "POST");
+    assert_eq!(request.target, "/rustfs/admin/v3/rebalance/start");
+
+    handle.join().expect("admin test server finished");
+}
+
+#[test]
+fn expand_stop_dispatches_to_rebalance_stop_with_expansion_json() {
+    let config_dir = tempfile::tempdir().expect("create config dir");
+    let (endpoint, receiver, handle) = start_admin_test_server("");
+
+    let output = Command::new(rc_binary())
+        .args(["--json", "admin", "expand", "stop", "myalias"])
+        .env("RC_CONFIG_DIR", config_dir.path())
+        .env("RC_HOST_myalias", rc_host_alias(&endpoint))
+        .output()
+        .expect("run rc command");
+
+    assert!(
+        output.status.success(),
+        "stderr: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+
+    let stdout = String::from_utf8(output.stdout).expect("stdout should be UTF-8");
+    let payload: serde_json::Value = serde_json::from_str(&stdout).expect("JSON output");
+    assert_eq!(payload["success"], true);
+    assert_eq!(
+        payload["message"],
+        "Expansion rebalance stopped successfully"
+    );
+    assert_eq!(payload["target"], "myalias");
+    assert!(payload.get("id").is_none());
+
+    let request = receiver
+        .recv_timeout(Duration::from_secs(5))
+        .expect("captured admin request");
+    assert_eq!(request.method, "POST");
+    assert_eq!(request.target, "/rustfs/admin/v3/rebalance/stop");
+
+    handle.join().expect("admin test server finished");
+}