Smoke testing and sanity testing in Testing Fundamentals - Test Execution Trace

Test Overview

This test performs a smoke test to check if the main features of the application load correctly. It then performs a sanity test to verify a specific feature works after a minor change.

Test Code - Selenium with unittest

Testing Fundamentals

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

    def test_smoke_and_sanity(self):
        driver = self.driver
        # Smoke Test: Check homepage title
        self.assertIn('Example Domain', driver.title)

        # Smoke Test: Check main heading is present
        heading = WebDriverWait(driver, 10).until(
            EC.presence_of_element_located((By.TAG_NAME, 'h1'))
        )
        self.assertEqual(heading.text, 'Example Domain')

        # Sanity Test: Click More Information link and verify URL
        more_info_link = driver.find_element(By.CSS_SELECTOR, 'a')
        more_info_link.click()

        WebDriverWait(driver, 10).until(
            EC.url_contains('iana.org/domains/example')
        )
        self.assertIn('iana.org/domains/example', driver.current_url)

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

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

Execution Trace - 6 Steps

Step	Action	System State	Assertion	Result
1	Test starts and browser opens Chrome	Chrome browser window opens at https://example.com homepage	-	PASS
2	Check homepage title contains 'Example Domain'	Browser shows homepage with title 'Example Domain'	Assert 'Example Domain' in page title	PASS
3	Wait for main heading <h1> to be present	Page loaded with visible main heading	Assert heading text equals 'Example Domain'	PASS
4	Find and click the 'More Information' link	User clicks link on homepage	-	PASS
5	Wait until URL contains 'iana.org/domains/example'	Browser navigates to IANA example domains page	Assert current URL contains 'iana.org/domains/example'	PASS
6	Test ends and browser closes	Browser window closes	-	PASS

Failure Scenario

Failing Condition: If the main heading <h1> is missing or text is incorrect

Execution Trace Quiz - 3 Questions

What does the smoke test verify in this test?

A The 'More Information' link navigates correctly

B The homepage title and main heading are present

C The browser can open and close

D The URL contains 'iana.org/domains/example'

Key Result

Perform smoke tests to quickly check if the main parts of the app load, then use sanity tests to verify specific features after changes.