refactor: eliminate jscpd clones and boost tests

src/gateway/test-helpers.server.ts

@@ -573,6 +573,43 @@ export async function connectOk(ws: WebSocket, opts?: Parameters<typeof connectR
   return res.payload as { type: "hello-ok" };
 }
 
+export async function connectWebchatClient(params: {
+  port: number;
+  origin?: string;
+  client?: NonNullable<Parameters<typeof connectReq>[1]>["client"];
+}): Promise<WebSocket> {
+  const origin = params.origin ?? `http://127.0.0.1:${params.port}`;
+  const ws = new WebSocket(`ws://127.0.0.1:${params.port}`, {
+    headers: { origin },
+  });
+  await new Promise<void>((resolve, reject) => {
+    const timer = setTimeout(() => reject(new Error("timeout waiting for ws open")), 10_000);
+    const onOpen = () => {
+      clearTimeout(timer);
+      ws.off("error", onError);
+      resolve();
+    };
+    const onError = (err: Error) => {
+      clearTimeout(timer);
+      ws.off("open", onOpen);
+      reject(err);
+    };
+    ws.once("open", onOpen);
+    ws.once("error", onError);
+  });
+  await connectOk(ws, {
+    client:
+      params.client ??
+      ({
+        id: GATEWAY_CLIENT_NAMES.WEBCHAT,
+        version: "1.0.0",
+        platform: "test",
+        mode: GATEWAY_CLIENT_MODES.WEBCHAT,
+      } as NonNullable<Parameters<typeof connectReq>[1]>["client"]),
+  });
+  return ws;
+}
+
 export async function rpcReq<T extends Record<string, unknown>>(
   ws: WebSocket,
   method: string,