e2e tests for engine (#322)

e2e-tests/engine.spec.ts

@@ -0,0 +1,12 @@
+import { test } from "./helpers/test_helper";
+
+test("send message to engine", async ({ po }) => {
+  await po.setUpDyadPro();
+  // By default, it's using auto which points to Flash 2.5 and doesn't
+  // use engine.
+  await po.selectModel({ provider: "Google", model: "Gemini 2.5 Pro" });
+  await po.sendPrompt("[dump] tc=turbo-edits");
+
+  await po.snapshotServerDump("request");
+  await po.snapshotMessages({ replaceDumpPath: true });
+});