assertTableStructureInEditorData example

$this->captionText = 'some caption';
    $this->tableCellText = 'table cell';

    $table_container = $assert_session->waitForElementVisible('css', 'figure.table');
    $this->assertNotNull($table_container);
    $caption = $page->find('css', 'figure.table > figcaption');
    $this->assertEquals($this->captionText, $caption->getText());
    $table = $page->find('css', 'figure.table > table');
    $this->assertEquals($this->tableCellText, $table->getText());

    $this->assertTableStructureInEditorData();
    $this->assertTableStructureInRenderedPage();
  }

  /** * Tests creating a table with caption in the UI. */
  public function testTableCaptionUi() {
    $assert_session = $this->assertSession();
    $page = $this->getSession()->getPage();

    $this->drupalGet($this->host->toUrl('edit-form'));