tests in swift

Swift Testing was a significant topic at WWDC 2024, with multiple sessions dedicated to it. Here are some key points and features discussed:

1. Introduction to Swift Testing:

   • Swift Testing is a new testing framework built from the ground up for Swift, designed to be expressive, easy to learn, and cross-platform. It supports all Apple operating systems, Linux, and Windows (Platforms State of the Union).

2. Key Features:

   • Test Functions: Use the @test attribute to denote test functions explicitly, supporting instance methods, static, or global functions (Meet Swift Testing).
   • Expectations: Instead of many specialized functions, Swift Testing uses two basic macros, expect and require, which accept ordinary expressions and language operators (Meet Swift Testing).
   • Traits: Specify information per test or suite, such as conditions under which tests should run (Meet Swift Testing).
   • Parameterized Testing: Easily run a single test function with many different arguments to cover various cases without duplicating code (Go further with Swift Testing).

3. Migration from XCTest:

   • Swift Testing and XCTest can coexist in a single target, allowing incremental migration. Swift Testing offers more consistent behavior across platforms and better functional parity (Meet Swift Testing).

4. Organizing Tests:

   • Use tags to organize and filter tests, and traits to add information or change behavior (What’s new in Swift).

5. Concurrency and Parallelization:

   • Swift Testing integrates seamlessly with Swift concurrency, supporting async/await and actor isolation. Tests run in process using Swift concurrency (Meet Swift Testing).

For a deeper dive into Swift Testing, you can check out the following sessions:

• Meet Swift Testing
• Go further with Swift Testing

These sessions cover the basics, advanced features, and practical workflows for using Swift Testing effectively.