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//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for Swift project authors
//
#if canImport(Foundation)
@_spi(Experimental) import Testing
import Foundation
#if SWT_TARGET_OS_APPLE && canImport(UniformTypeIdentifiers)
private import UniformTypeIdentifiers
#endif
/// An enumeration describing the encoding formats we support for `Encodable`
/// and `NSSecureCoding` types that conform to `Attachable`.
enum EncodingFormat {
/// The encoding format to use by default.
///
/// The specific format this case corresponds to depends on if we are encoding
/// an `Encodable` value or an `NSSecureCoding` value.
case `default`
/// A property list format.
///
/// - Parameters:
/// - format: The corresponding property list format.
case propertyListFormat(_ format: PropertyListSerialization.PropertyListFormat)
/// The JSON format.
case json
/// Initialize an instance of this type representing the content type or media
/// type of the specified attachment.
///
/// - Parameters:
/// - attachment: The attachment that will be encoded.
///
/// - Throws: If the attachment's content type or media type is unsupported.
init(for attachment: borrowing Attachment<some Attachable>) throws {
let ext = (attachment.preferredName as NSString).pathExtension
#if SWT_TARGET_OS_APPLE && canImport(UniformTypeIdentifiers)
// If the caller explicitly wants to encode their data as either XML or as a
// property list, use PropertyListEncoder. Otherwise, we'll fall back to
// JSONEncoder below.
if #available(_uttypesAPI, *), let contentType = UTType(filenameExtension: ext) {
if contentType == .data {
self = .default
} else if contentType.conforms(to: .json) {
self = .json
} else if contentType.conforms(to: .xml) {
self = .propertyListFormat(.xml)
} else if contentType.conforms(to: .binaryPropertyList) || contentType == .propertyList {
self = .propertyListFormat(.binary)
} else if contentType.conforms(to: .propertyList) {
self = .propertyListFormat(.openStep)
} else {
let contentTypeDescription = contentType.localizedDescription ?? contentType.identifier
throw CocoaError(.propertyListWriteInvalid, userInfo: [NSLocalizedDescriptionKey: "The content type '\(contentTypeDescription)' cannot be used to attach an instance of \(type(of: self)) to a test."])
}
return
}
#endif
if ext.isEmpty {
// No path extension? No problem! Default data.
self = .default
} else if ext.caseInsensitiveCompare("plist") == .orderedSame {
self = .propertyListFormat(.binary)
} else if ext.caseInsensitiveCompare("xml") == .orderedSame {
self = .propertyListFormat(.xml)
} else if ext.caseInsensitiveCompare("json") == .orderedSame {
self = .json
} else {
throw CocoaError(.propertyListWriteInvalid, userInfo: [NSLocalizedDescriptionKey: "The path extension '.\(ext)' cannot be used to attach an instance of \(type(of: self)) to a test."])
}
}
}
#endif
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