testing modules | Ask WWDC

Apple introduced a new testing framework called Swift Testing at WWDC 2024. This framework is designed to be expressive, easy to learn, and cross-platform, making it suitable for a variety of platforms and domains. Here are some key features and concepts of Swift Testing:

Test Functions: These are ordinary Swift functions marked with the @test attribute. They can be global functions or methods in a type and can be marked async or throws.
Expectations: Swift Testing uses the expect macro to validate that your code behaves as expected. This macro leverages Swift language features to provide a concise and expressive interface for writing tests.
Test Suites: These are types that group related test functions or other suites. They can be annotated explicitly using the @suite attribute. Suites can have stored instance properties and use init or deinit to perform logic before or after each test.
Traits and Tags: Traits provide additional information about tests or suites, and tags help organize tests across different files, suites, and targets.
Parameterized Testing: Swift Testing supports parameterized tests, allowing you to run the same test logic with different inputs.
Integration with Xcode: Swift Testing is integrated into Xcode, making it easy to write and run tests within the IDE.
Open Source: Swift Testing is developed as an open-source package and is hosted on GitHub. It supports all Apple operating systems that support Swift concurrency, as well as Linux and Windows.

For more detailed information, you can refer to the following sessions from WWDC 2024:

Platforms State of the Union (32:12) - Introduction to Swift Testing.
Meet Swift Testing - Comprehensive overview of Swift Testing.
Go further with Swift Testing - Advanced features and best practices for using Swift Testing.
What’s new in Xcode 16 (12:55) - Introduction to Swift Testing in Xcode 16.

These sessions provide a thorough understanding of the new testing framework and how to effectively use it in your projects.