test

It looks like you're interested in testing features presented at WWDC. Here are some relevant sessions and details:

Sessions Mentioned

1. What’s new in Xcode 16
2. Go further with Swift Testing
3. Meet Swift Testing

Key Points on Swift Testing

• Parameterized Tests: Swift testing allows you to write parameterized tests, which can take one or more parameters. This helps in reducing code duplication and makes it easier to test multiple cases efficiently. Each argument in a parameterized test runs as its own test case, which can run in parallel, improving test coverage and performance. (Go further with Swift Testing)

• Test Macros: The @Test macro is used to mark functions as tests. It can accept various traits to add information or change behavior, such as providing a display name or arguments to a test function. (What’s new in Xcode 16)

• Tags and Test Plans: Tags can be used to group tests together, and you can include or exclude tests from test plans based on these tags. This is useful for managing tests during different stages of development. (What’s new in Xcode 16)

• Test Suites: Test suites allow you to group related tests together. Each test function in a suite is called on a new instance of its containing suite type, ensuring no unintentional state sharing. (Meet Swift Testing)

• Async and Actor Isolation: Swift testing integrates seamlessly with Swift concurrency, supporting async/await and actor isolation. This makes it easier to write tests for asynchronous code. (Meet Swift Testing)

Example of Parameterized Testing

Here's an example of how parameterized testing can be used to test an enumeration of ice cream flavors:

enum IceCreamFlavor {
    case vanilla, chocolate, strawberry, mint
    var containsNuts: Bool {
        switch self {
        case .vanilla, .strawberry: return false
        case .chocolate, .mint: return true
        }
    }
}

@testable import MyApp
import XCTest

final class IceCreamFlavorTests: XCTestCase {
    @Test
    func testContainsNuts(flavor: IceCreamFlavor) {
        let expected = flavor == .chocolate || flavor == .mint
        XCTAssertEqual(flavor.containsNuts, expected)
    }
}

This test function will run for each case in the IceCreamFlavor enumeration, checking if the containsNuts property returns the expected value.

For more detailed information, you can watch the sessions:

• What’s new in Xcode 16
• Go further with Swift Testing
• Meet Swift Testing