Add evaluate

packages/server/test/helpers.ts

@@ -0,0 +1,28 @@
+import { Emitter } from "@coder/events";
+import { Client } from "../src/browser/client";
+import { Server } from "../src/node/server";
+
+export const createClient = (): Client => {
+    const s2c = new Emitter<Uint8Array | Buffer>();
+    const c2s = new Emitter<Uint8Array | Buffer>();
+
+    new Server({
+        close: () => undefined,
+        onClose: () => undefined,
+        onMessage: (cb) => {
+            c2s.event((d) => cb(d));
+        },
+        send: (data) => setTimeout(() => s2c.emit(data), 0),
+    });
+
+    const client = new Client({
+        close: () => undefined,
+        onClose: () => undefined,
+        onMessage: (cb) => {
+            s2c.event((d) => cb(d));
+        },
+        send: (data) => setTimeout(() => c2s.emit(data), 0),
+    });
+
+    return client;
+};