ST-0015: Image attachments in Swift Testing (Windows)

Evolution Proposal Reviews
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Hello Swift community,

The review of "ST-0015: Image attachments in Swift Testing (Windows)" begins now and runs through September 29, 2025. The proposal is available here:

swift-evolution/proposals/testing/0015-image-attachments-in-swift-testing-windows.md at main · swiftlang/swift-evolution · GitHub

Reviews are an important part of the Swift evolution process. All review feedback should be either on this forum thread or, if you would like to keep your feedback private, directly to the review manager. When emailing the review manager directly, please keep the proposal link at the top of the message.

Trying it out

To try this feature out, add a dependency to the main branch of swift-testing to your package:

dependencies: [
  ...
  .package(url: "https://github.com/swiftlang/swift-testing.git", branch: "main"),
]

Then, add a target dependency to your test target:

.testTarget(
  ...
  dependencies: [
    ...
    .product(name: "Testing", package: "swift-testing"),
    .product(name: "_Testing_ExperimentalImageAttachments", package: "swift-testing"),
  ]

Finally, add the following imports to any source file that will attach an image to a test:

@_spi(Experimental) import Testing
import WinSDK
@_spi(Experimental) import _Testing_WinSDK

Note: This extra product dependency and extra import statement of _Testing_WinSDK are a side effect of how packages are built. They will not be required in the final implementation of this feature.

What goes into a review?

The goal of the review process is to improve the proposal under review through constructive criticism and, eventually, determine the direction of Swift. When writing your review, here are some questions you might want to answer in your review:

  • What is your evaluation of the proposal?
  • Is the problem being addressed significant enough to warrant a change to Swift Testing?
  • Does this proposal fit well with the feel and direction of Swift Testing?
  • If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?
  • How much effort did you put into your review? A glance, a quick reading, or an in-depth study?

More information about the Swift evolution process is available at

swift-evolution/process.md at main · swiftlang/swift-evolution · GitHub

Thank you,

Stuart Montgomery
Review Manager