Tools for automated visual testing

Types of Visual Testing

Configuration – Based automated visual testing (Open Source Tools):

The following are some of the tools for automated visual testing:

Code-Based automated visual testing (Open Source Tools):

1. Specter

Specter is the automated visual regression testing framework.
After the web page is created, each individual component will be checked whether it is rendered properly or not.
Specter will capture screenshots of the elements matching the selectors specified, at all the screen dimensions desired.

2. Needle

It checks that visuals like images, layouts, buttons, CSS, SVG, etc., are rendered correctly by taking screenshots of portions of a website and comparing them against known good screenshots.
It also provides tools for testing calculated CSS values and the position of HTML elements.

3. Gemini

It checks the visual appearance of the web page. Here, it tests the web page separately.
It includes some of the CSS properties while checking the web pages with correct elements and their position.
It gathers the CSS test statistics.
Some of the rendering features for images are not supported.

4. Pix-Diff

It is developed to compare the screenshots of the developed web pages.
The image comparison is carried out in three ways- Pixel-by-Pixel, Perceptual, and context.
It ensures that the part of the image is missing.
It is used to check the low-frequency images.

5. FBSnapshotTestcases

It takes a UI View or layer and uses the necessary UI kit to generate the automated image snapshots of its content.
It creates the reference image and compares it with the actual image of the generated code.
One pixel change will lead to the failure of testing.

Visual Testing – Software Testing

Visual Testing is also called Visual UI Testing. It validates whether the developed software user interface (UI) is compatible with the user’s view. It ensures that the developed web design is correctly following the spaces, sizes, shapes, and positions of UI elements. It also ensures that the elements are working properly with various devices and browsers. Visual testing validates how multiple devices, browsers, operating systems, etc., affect the software.

This Article focuses on discussing each of these topics-

Table of Content

Features of Visual Testing
Why Visual Testing?
Visual Testing Methods
Types of Visual Testing
Tools for automated visual testing
Additional types of Visual Testing
Advantages of Visual Testing
Disadvantages of Visual Testing
Conclusion

Let’s start discussing each of these topics in detail.