refresh e2e (#307)

e2e-tests/refresh.spec.ts

@@ -0,0 +1,19 @@
+import { test } from "./helpers/test_helper";
+
+test("refresh app", async ({ po }) => {
+  await po.setUp({ autoApprove: true });
+  await po.sendPrompt("hi");
+
+  // Drop the document.body inside the contentFrame to make
+  // sure refresh works.
+  await po
+    .getPreviewIframeElement()
+    .contentFrame()
+    .locator("body")
+    .evaluate((body) => {
+      body.remove();
+    });
+
+  await po.clickPreviewRefresh();
+  await po.snapshotPreview();
+});