initial commit for notbooks pupeteer tests

test/notebooks/notebookTestUtils.ts

@@ -0,0 +1,18 @@
+import { Frame } from "puppeteer";
+
+let testExplorerFrame: Frame;
+export async function getTestExplorerFrame(): Promise<Frame> {
+  if (testExplorerFrame) {
+    return testExplorerFrame;
+  }
+
+  const prodUrl = "https://localhost:1234/testExplorer.html";
+  await page.goto(prodUrl);
+  const buttonHandle = await page.waitForSelector("button");
+  buttonHandle.click();
+
+  const handle = await page.waitForSelector("iframe");
+  testExplorerFrame = await handle.contentFrame();
+  await testExplorerFrame.waitForSelector(".galleryHeader");
+  return testExplorerFrame;
+}