how can i move swift testing

To move your Swift testing from XCTest to the new Swift Testing framework, you can follow these steps:

1. Add a Test Bundle Target:

   • If you haven't written tests before, start by adding a test bundle target to your project. In Xcode, choose File > New > Target, then search for Unit Testing Bundle in the test section. Swift Testing is the default choice for this template in Xcode 16. (Meet Swift Testing)

2. Understand the Differences:

   • Swift Testing uses the @Test attribute to denote test functions explicitly, unlike XCTest which uses method names starting with test.
   • Swift Testing supports more kinds of functions, including instance methods, static methods, and global functions.
   • It also supports traits for specifying information per test or per suite and takes a different approach to parallelization using Swift concurrency. (Meet Swift Testing)

3. Migrate Existing Tests:

   • For existing XCTest methods, you can consolidate similar structured tests into one parameterized test in Swift Testing.
   • For XCTest classes with only one test method, consider migrating them to a global test function.
   • Avoid calling XCTest assertion functions from Swift Testing tests and vice versa. (Meet Swift Testing)

4. Run Tests:

   • You can run tests from the terminal by typing swift test. This command runs both XCTest and Swift Testing tests, showing pass and fail results with detailed failure messages. (Meet Swift Testing)

5. Utilize Parallel Testing:

   • Swift Testing runs tests in parallel by default, which can reduce the time it takes to run your tests. It uses Swift concurrency features, allowing tests to run as fast as possible. (Go further with Swift Testing)

6. Handle Asynchronous Conditions:

   • When writing concurrent test code, you can use the same concurrency features in Swift as in your production code. The await keyword works the same way, suspending a test and allowing other test code to keep the CPU busy while work is pending. (Go further with Swift Testing)

For more detailed guidance, you can refer to the sessions "Meet Swift Testing" and "Go further with Swift Testing" from WWDC 2024.