driver.findElements() never fails

The following test is tricky:

@Test
public void searchReturnsResultsTest() {

   //open page
   driver.get(HOME_PAGE_URL);

   //check that home page is displayed
   Assert.assertEquals(driver.getCurrentUrl(), HOME_PAGE_URL);

   //search for keyword
   WebElement searchBox = driver.findElement(searchBoxName);
   searchBox.sendKeys(KEYWORD);

   WebElement searchButton = driver.findElement(searchButtonXpath);
   searchButton.click();

   //check that results page is displayed
   Assert.assertEquals(driver.getCurrentUrl(), RESULTS_PAGE_URL);

   //get all product names from the page
   List<WebElement> productNames = driver.findElements(productNameXpath);

   //check that all product names are not empty
   for (WebElement productName : productNames)
      Assert.assertFalse(productName.getText().isEmpty());

}

Why is this test tricky?

If the results page loads fast after searching, driver.findElements() returns a non-empty list of product names.

But if the results page loads slowly, driver.findElements() returns an empty list. The following for statement is skipped and the test passes without executing any assertions.

What should we do?

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