Test functions and classes in Selenium Python - Test Execution Trace

Test Overview

This test opens a web page, finds a button by its ID, clicks it, and verifies that a message appears. It uses a test class with setup and teardown methods and a test function inside the class.

Test Code - unittest

Selenium Python

import unittest
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

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

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

    def test_button_click_shows_message(self):
        driver = self.driver
        button = WebDriverWait(driver, 10).until(
            EC.presence_of_element_located((By.ID, 'show-message-btn'))
        )
        button.click()
        message = WebDriverWait(driver, 10).until(
            EC.visibility_of_element_located((By.ID, 'message'))
        )
        self.assertEqual(message.text, 'Button clicked!')

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

Execution Trace - 7 Steps

Step	Action	System State	Assertion	Result
1	Test starts by running unittest main	No browser open yet	-	PASS
2	setUp method opens Chrome browser and navigates to https://example.com/button	Browser opened at the button test page	-	PASS
3	Waits up to 10 seconds for button with ID 'show-message-btn' to be present	Button element is found on the page	Button presence verified	PASS
4	Clicks the button	Button clicked, page reacts by showing a message	-	PASS
5	Waits up to 10 seconds for message with ID 'message' to be visible	Message element is visible on the page	Message visibility verified	PASS
6	Asserts that message text equals 'Button clicked!'	Message text is 'Button clicked!'	Text equality assertion	PASS
7	tearDown method closes the browser	Browser closed	-	PASS

Failure Scenario

Failing Condition: Button with ID 'show-message-btn' is not found on the page

Execution Trace Quiz - 3 Questions

What does the test verify after clicking the button?

A That a message with text 'Button clicked!' appears

B That the button disappears

C That the page URL changes

D That the browser closes automatically

Key Result

Using setup and teardown methods in a test class helps prepare and clean up the test environment, making tests organized and reliable.