what is swift testing

Generated on 8/12/2024

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Swift Testing is a modern, open-source testing framework introduced by Apple, designed specifically for Swift. It provides a powerful and expressive API for writing tests, making it easier to ensure the quality and reliability of Swift code. Here are some key features and aspects of Swift Testing:

  1. Expressive APIs: Swift Testing offers expressive APIs that simplify the process of writing tests. You can use macros like expect to evaluate Swift expressions, making it easy to write complex checks.

  2. Cross-Platform Support: It is designed to work across all Apple operating systems that support Swift concurrency, as well as on Linux and Windows. This ensures consistent behavior of tests across different platforms.

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

  4. Open Source: The framework is open source and hosted on GitHub, allowing the community to contribute to its development and evolution.

  5. Parallel Testing: It takes full advantage of Swift's concurrency features, allowing tests to run safely in parallel, which can reduce the time it takes to run tests and help identify dependencies between them.

  6. Parameterized Tests and Tagging: Swift Testing supports parameterized tests, allowing you to reuse the same logic over different values. It also includes a flexible tagging system to organize and selectively run tests.

  7. Migration from XCTest: While it shares some similarities with XCTest, Swift Testing introduces new features and improvements, such as explicit test attributes and better support for concurrency.

For more detailed information, you can refer to the sessions "Meet Swift Testing" and "Go further with Swift Testing" from WWDC 2024. If you're interested in the introduction to Swift Testing, you can watch the session Meet Swift Testing (00:00:07).

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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.

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.

Platforms State of the Union

Platforms State of the Union

Discover the newest advancements on Apple platforms.

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.