[Functional][TSVB] Wait for markdown textarea to be cleaned (#85128) (#…

…85371)

* [TSVB] Wait for markdown textarea to be cleaned

* No need for retry

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

test/functional/page_objects/visual_builder_page.ts

@@ -131,8 +131,8 @@ export function VisualBuilderPageProvider({ getService, getPageObjects }: FtrPro
     }
 
     public async enterMarkdown(markdown: string) {
-      const input = await find.byCssSelector('.tvbMarkdownEditor__editor textarea');
       await this.clearMarkdown();
+      const input = await find.byCssSelector('.tvbMarkdownEditor__editor textarea');
       await input.type(markdown);
       await PageObjects.common.sleep(3000);
     }
@@ -147,14 +147,20 @@ export function VisualBuilderPageProvider({ getService, getPageObjects }: FtrPro
         const value = $('.ace_line').text();
         if (value.length > 0) {
           log.debug('Clearing text area input');
-          const input = await find.byCssSelector('.tvbMarkdownEditor__editor textarea');
-          await input.clearValueWithKeyboard();
+          this.waitForMarkdownTextAreaCleaned();
         }
 
         return value.length === 0;
       });
     }
 
+    public async waitForMarkdownTextAreaCleaned() {
+      const input = await find.byCssSelector('.tvbMarkdownEditor__editor textarea');
+      await input.clearValueWithKeyboard();
+      const text = await this.getMarkdownText();
+      return text.length === 0;
+    }
+
     public async getMarkdownText(): Promise<string> {
       const el = await find.byCssSelector('.tvbEditorVisualization');
       const text = await el.getVisibleText();