chore: migrate blocksuite test (#9222)

blocksuite/tests-legacy/utils/inline-editor.ts

@@ -0,0 +1,26 @@
+import type { Page } from '@playwright/test';
+
+import { currentEditorIndex } from './multiple-editor.js';
+
+export async function getStringFromRichText(
+  page: Page,
+  index = 0
+): Promise<string> {
+  await page.waitForTimeout(50);
+  return page.evaluate(
+    ([index, currentEditorIndex]) => {
+      const editorHost =
+        document.querySelectorAll('editor-host')[currentEditorIndex];
+      const richTexts = editorHost.querySelectorAll('rich-text');
+
+      if (!richTexts) {
+        throw new Error('Cannot find rich-text');
+      }
+
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const editor = (richTexts[index] as any).inlineEditor;
+      return editor.yText.toString();
+    },
+    [index, currentEditorIndex]
+  );
+}