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Kiwi vs Kotest comparison of testing frameworks
What are the differences between Kiwi and Kotest?

Kiwi

https://github.com/kiwi-bdd/Kiwi

Kotest

https://github.com/kotest/kotest
Programming language

Swift

Kotlin

Category

Unit Testing

Unit Testing

General info

Kiwi is a Behavior Driven Development library for iOS development

The goal behind Kiwi is to provide a BDD library that is simple to setup and use, and create tests that are more readable than what is possible with the bundled test framework.

kotest is a powerful, elegant and flexible test framework for Kotlin, formerly known as kotlintest

Kotest has excellent support for data driven testing or table driven testing where it has the ability to quickly rerun the same test over and over with a predefined set of inputs and expected values
xUnit
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.

Yes

Kiwi is an xUnit style framework

No

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

Yes

You can test front-end components with kiwi

Yes

You can test front-end components with kotest
Server-side
Allows testing the bahovior of a server-side code

Yes

You can test back-end components with kiwi

Yes

Yes, you can test back-end components with kotest
Fixtures
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test

Yes

kotest contains fixtures, that is the setup / teardown functions
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

kiwi has a beforeEach(aBlock) which is run before every 'it' block in all enclosed contexts. Code that sets up the particular context should go here and afterEach(aBlock) which is run after every it block in all enclosed contexts

Yes

kotest has group fixtures available
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.

Yes

through the beforeAll(aBlock) and afterAll(aBlock) functions.

N/A

Licence
Licence type governing the use and redistribution of the software

Proprietary, Open source

Apache License 2.0

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

Kiwi has inbuilt support for stubs and mocks,including null mocks, class mocks, protocol mocks

Yes

You can use a third party library like mockk to create mocks
Grouping
Allows organizing tests in groups

Yes

Kiwi uses the block syntax in iOS to define groups of assertions and share setup state between collections of tests

Yes

You can create test suites with kotest
Other
Other useful information about the testing framework