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WebdriverIO vs Wallaby comparison of testing frameworks
What are the differences between WebdriverIO and Wallaby?

WebdriverIO

https://webdriver.io/

Wallaby

https://github.com/elixir-wallaby/wallaby
Programming language

JavaScript

Elixir

Category

Browser Automation, Unit Testing, Functional Testing

Intergration Testing, Browser Automation

General info

WebdriverIO is the next-gen WebDriver test framework for Node.js made upon Selenium

WebdriverIO is written in JavaScript and uses Selenium under the hood. It also comes with its own inbuilt test runner and supports other testing frameworks like Jasmine, Cucumber, and Mocha

Library for end-to-end intergration testing for Elixir apps

Wallaby supports concurrent feature testing (i.e multiple tests can run concurrently) as well as browser management
xUnit
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.

Yes

No

Client-side
Allows testing code execution on the client, such as a web browser

Yes

WebdriverIO allows the use of advanced CSS selectors and makes it easy to find elements for front-end testing

Yes

It works well for automated E2E testing; Wallaby also has an experimental Chrome Driver that works well
Server-side
Allows testing the bahovior of a server-side code

Yes

It can be used to test server side behaviour and functionality

N/A
Fixtures
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test

Yes

WebdriverIO supports the creation of fixtures

N/A

Group fixtures
Allows defining a fixed, specific states of data for a group of tests (group-fixtures). This ensures specific environment for a given group of tests.

Yes

WebdriverIO supports the creation of group fixtures

N/A

Generators
Supports data generators for tests. Data generators generate input data for test. The test is then run for each input data produced in this way.

N/A

N/A

Licence
Licence type governing the use and redistribution of the software

MIT License

MIT License

Mocks
Mocks are objects that simulate the behavior of real objects. Using mocks allows testing some part of the code in isolation (with other parts mocked when needed)

Yes

It contains a mocking service called 'wdio-wiremock-service'

Yes

Available through third party libraries like Mock and Mockery
Grouping
Allows organizing tests in groups

Yes

WebdriverIO allows one to build test suites, you can run these test in parallel and organize them by adjusting the 'maxInstances' property in your config file

N/A

Other
Other useful information about the testing framework