# Attachment A type describing values that can be attached to the output of a test run and inspected later by the user. ``` struct Attachment where AttachableValue : Attachable, AttachableValue : ~Copyable ``` ## Overview To create an attachment, you need a value of some type that conforms to [`Attachable`](/documentation/Testing/Attachable). Initialize an instance of [`Attachment`](/documentation/Testing/Attachment) with that value and, optionally, a preferred filename to use when saving the attachment. To record the attachment, call [`record(_:sourceLocation:)`](/documentation/Testing/Attachment/record(_:sourceLocation:)). Alternatively, pass your attachable value directly to [`record(_:named:sourceLocation:)`](/documentation/Testing/Attachment/record(_:named:sourceLocation:)). ## Relationships ### Conforms To [`Escapable`](/documentation/Swift/Escapable) [`Sendable`](/documentation/Swift/Sendable) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Copyable`](/documentation/Swift/Copyable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)