Introduction to 'Presence_of_element_located by id'

The 'Presence_of_element_located by id' method is a useful tool for web developers and software testers to verify if an element is present on a web page. This method is commonly used with Selenium WebDriver to automate web testing.

Syntax

The syntax for the 'Presence_of_element_located by id' method is as follows:

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

element = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "element_id"))
)

Explanation

The 'Presence_of_element_located by id' method first imports the necessary libraries: By from selenium.webdriver.common.by, WebDriverWait from selenium.webdriver.support.ui, and expected_conditions as EC from selenium.webdriver.support.

Next, the method waits for a maximum of 10 seconds for the element with the specified ID to appear on the web page. The 'EC.presence_of_element_located' function is called and passed as an argument to the WebDriverWait function along with the driver instance and the ID of the element.

If the element is found within the specified time, the method returns the element. Otherwise, a TimeoutException is raised.

Usage

The 'Presence_of_element_located by id' method is commonly used in automated web testing to verify that a specific element is present on a web page before performing an action on it, such as clicking a button or entering text in a text field.

For example, consider the following code snippet:

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.Chrome()
driver.get("https://www.example.com")

element = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.ID, "search-box"))
)
element.send_keys("Hello World")

In this example, we initialize the Chrome webdriver and navigate to the example.com website. We then use the 'Presence_of_element_located by id' method to wait until the 'search-box' element is present on the web page before entering the text "Hello World" into it.

Conclusion

In summary, the 'Presence_of_element_located by id' method is a powerful tool for web developers and software testers to ensure that the necessary elements are present on a web page before performing automated actions. This method, when combined with other Selenium functions, can significantly improve the efficiency and accuracy of web testing.