How can I assert if the selection I did on a table is what I expected?

Hi All!

I'm studying the Action class to perform the use of mouse and keyboard events.

In the example below I'm selecting the first and second rows of the table. I would like to know how to create an assert to know if the number of select rows is 2.

Code:

@Test
   public void testingClick(){
      driver.get("http :/ /www . w3schools. com /tags /tag_table. asp");
      
      List<WebElement> tabelas = driver.findElements(By.xpath("//table[@class='reference']/tbody/tr"));
      
      Actions builder = new Actions(driver);
      
      builder.click(tabelas.get(0));
      builder.keyDown(Keys.CONTROL);
      builder.click(tabelas.get(1));
      builder.keyUp(Keys.CONTROL);
      builder.build().perform();