Expected conditions in Selenium Python - Test Execution Trace

Test Overview

This test opens a web page, waits until a button becomes clickable using Selenium's expected conditions, clicks the button, and verifies that a success message appears.

Test Code - Selenium

Selenium Python

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
import unittest

class TestExpectedConditions(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get('https://example.com/testpage')

    def test_button_clickable_and_message(self):
        driver = self.driver
        wait = WebDriverWait(driver, 10)
        # Wait until the button with id 'submit-btn' is clickable
        button = wait.until(EC.element_to_be_clickable((By.ID, 'submit-btn')))
        button.click()
        # Wait until the success message with id 'success-msg' is visible
        success_msg = wait.until(EC.visibility_of_element_located((By.ID, 'success-msg')))
        self.assertEqual(success_msg.text, 'Success!')

    def tearDown(self):
        self.driver.quit()

if __name__ == '__main__':
    unittest.main()

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts and Chrome browser opens	Browser window is open and navigated to 'https://example.com/testpage'	-	PASS
2	Wait until the button with id 'submit-btn' is clickable using WebDriverWait and expected_conditions.element_to_be_clickable	Button with id 'submit-btn' is present and enabled on the page	Check that the button is clickable	PASS
3	Click the button with id 'submit-btn'	Button is clicked, triggering page action	-	PASS
4	Wait until the success message with id 'success-msg' is visible using expected_conditions.visibility_of_element_located	Success message element appears on the page	Check that the success message text equals 'Success!'	PASS
5	Test ends and browser closes	Browser window is closed	-	PASS

Failure Scenario

Failing Condition: The button with id 'submit-btn' does not become clickable within 10 seconds

Execution Trace Quiz - 3 Questions

What does the test wait for before clicking the button?

A The button to be clickable

B The button to be visible only

C The page to finish loading

D The button to be present in the DOM only

Key Result

Using Selenium's expected conditions with WebDriverWait helps tests wait smartly for elements to be ready, avoiding flaky failures due to timing issues.