Visual Testing - Other Types of Testing

Visual testing is a type of testing that checks for changes in the graphical user interface (GUI) of a software application. It involves comparing expected and actual screenshots to detect any inconsistencies. In this tutorial, we will explore visual testing in detail.

Getting Started with Visual Testing

Syntax:

There are several visual testing tools available in the market, including Applitools, Percy, and Galen. Each tool has its own syntax and approach to visual testing.

Example:

Let's consider Applitools as an example of a visual testing tool. Here's an example of how to perform visual testing using Applitools:

from applitools.eyes import Eyes
from applitools.selenium import EyesWebDriver, VisualGridRunner

eyes = Eyes(VisualGridRunner(1))
eyes.api_key = 'your_api_key'

# Start the session and defining the app under test
driver = get_webdriver()
eyes_driver = EyesWebDriver(driver, eyes)

# Navigate to the page you want to test
driver.get("https://example.com")

# Create a new checkpoint and perform the visual test
with eyes_driver as driver:
    eyes.open(driver, "Example.com", "Homepage")
    eyes.check_window("Homepage")
    eyes.close_async()

Output:

The output of visual testing is a report that shows any differences detected between the expected and actual screenshots of the GUI.

Explanation:

Visual testing works by capturing screenshots of the expected and actual GUI of a software application and comparing them for differences. Visual testing tools use algorithms to identify the smallest possible differences in the GUI, including changes in colors, sizes, shapes, and placement.

Visual testing is usually performed as part of the regression testing process to ensure that any changes made to the GUI do not negatively impact the user experience.

Use

Visual testing can be used to detect any changes in the GUI of a software application. It can help ensure that the user experience is consistent across different browsers, devices, and platforms.

Important Points

• Visual testing tools can quickly detect any changes in the GUI of a software application.
• Visual testing helps ensure the UI is consistent across different platforms.
• Visual testing can be useful for testing responsive website design.

Summary

In this tutorial, we learned about visual testing, its syntax, example, output, explanation, use, and important points. Visual testing is an essential part of the software testing process and can help ensure the user experience is consistent across different browsers, devices, and platforms. Using a visual testing tool such as Applitools, Percy, or Galen can help automate the visual testing process and save time for testers.