how to verify an element does NOT exist in Selenium 二

WebElement element = driver.findElements(By.id("block-id"));

assertNull(element);

??? this code snippet will get a NoSuchEleementException, use the following 2 implementations instead

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1. make the test expect the very exception

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    @Test(expected = org.openqa.selenium.NoSuchElementException.class)
    public void haveNoRecommendation() {
        ...
        driver.findElement(By.id("block-id"));
    }

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2. use findElements instead of findElement

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    public void elementNotExist(String id) {
        List<WebElement> elements = driver.findElements(By.id(id));
        assertTrue(elements.isEmpty());
    }

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