tell me about swift testing

Generated on 8/2/2024

1 search

Swift Testing is a new, open-source testing framework introduced by Apple, designed specifically for Swift. It offers a modern and expressive API that simplifies writing tests and is cross-platform, supporting all Apple operating systems, Linux, and Windows. Here are some key features and details about Swift Testing:

  1. Expressive APIs: Swift Testing provides expressive APIs that make it simple to write tests. You can use the @test attribute to denote test functions explicitly, which removes ambiguity compared to XCTest where test functions are identified by their name prefix.

  2. Macros for Assertions: The framework includes macros like expect to evaluate the result of any Swift expression, making it easy to write complex checks.

  3. Tagging System: Swift Testing includes a flexible tagging system to help organize tests. Tags can be used to selectively run tests across your test suite, such as tests that use a certain module or run on a specific device.

  4. Parameterized Tests: You can easily parameterize tests to reuse the same logic over a sequence of values, which helps in reducing code duplication.

  5. Concurrency Support: Swift Testing takes full advantage of Swift's concurrency features, running tests safely in parallel. This can reduce the time it takes to run your tests and help identify dependencies between them.

  6. Integration with Tools: It is integrated into major tools and IDEs in the Swift ecosystem, including Swift Package Manager, Xcode 16, and Visual Studio Code with the Swift extension.

  7. Open Source and Community Driven: Swift Testing is open source and hosted on GitHub. It has an open feature proposal process and encourages community involvement in its evolution.

  8. Migration from XCTest: Swift Testing offers guidance on migrating from XCTest, highlighting similarities and differences. For example, while XCTest uses method names to identify tests, Swift Testing uses explicit attributes.

For a detailed introduction to Swift Testing, you can watch the session Meet Swift Testing. For more advanced features and workflows, check out Go further with Swift Testing.

Relevant Sessions

  1. Meet Swift Testing
  2. Go further with Swift Testing
  3. Platforms State of the Union
  4. What’s new in Swift
Provide feedback
Platforms State of the Union

Platforms State of the Union

Discover the newest advancements on Apple platforms.

Meet Swift Testing

Meet Swift Testing

Introducing Swift Testing: a new package for testing your code using Swift. Explore the building blocks of its powerful new API, discover how it can be applied in common testing workflows, and learn how it relates to XCTest and open source Swift.

Go further with Swift Testing

Go further with Swift Testing

Learn how to write a sweet set of (test) suites using Swift Testing’s baked-in features. Discover how to take the building blocks further and use them to help expand tests to cover more scenarios, organize your tests across different suites, and optimize your tests to run in parallel.

What’s new in Swift

What’s new in Swift

Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.