Approve & reject proposal e2e (#298)

e2e-tests/approve.spec.ts

@@ -0,0 +1,16 @@
+import { test } from "./helpers/test_helper";
+import { expect } from "@playwright/test";
+
+test("write to index, approve, check preview", async ({ po }) => {
+  await po.setUp();
+  await po.sendPrompt("tc=write-index");
+  await po.snapshotMessages();
+  await po.approveProposal();
+
+  // Should be slightly different from above, because it will say "approved"
+  await po.snapshotMessages();
+
+  // This can be pretty slow because it's waiting for the app to build.
+  await expect(po.getPreviewIframeElement()).toBeVisible({ timeout: 15_000 });
+  await po.snapshotPreview();
+});