Python Methodology

What are Functional Tests?

Functional tests focus on verifying that the software meets the defined functional requirements. They evaluate the application from the user's perspective without considering the internal structure of the code.

Importance of Functional Tests

These tests ensure that the software fulfills its purpose, providing an optimal user experience and minimizing errors in production.

How to Implement Functional Tests

Functional tests can be manual or automated. Let's look at an example in Python using selenium for automation:

from selenium import webdriver
from selenium.webdriver.common.by import By

# Set up the browser
browser = webdriver.Chrome()
browser.get("https://example.com")

# Verify an element on the page
assert "Welcome" in browser.page_source
browser.quit()

This script opens a web page, verifies that it contains the word Welcome, and then closes the browser.

Types of Functional Tests

  • Black Box Testing: Evaluates the system without knowing its internal structure.
  • Regression Testing: Ensures that modifications do not affect previous functionality.
  • Acceptance Testing: Verifies that the software meets the criteria established by the client.
  • System Testing: Comprehensive evaluation of the software in its real-world environment.

Conclusion

Functional tests are essential to ensure that an application works. Correctly implemented from the user's perspective. Proper implementation helps improve software quality and avoid production failures.