[Experimental] Implement JSON coding without using Foundation or Codable.

Sources/Overlays/_Testing_Foundation/Attachments/Attachable+Encodable+NSSecureCoding.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 public import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/Attachable+Encodable.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 private import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/Attachable+NSSecureCoding.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 public import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/Attachment+URL.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 public import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/Data+Attachable.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 public import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/EncodingFormat.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) import Testing
 import Foundation
 

Sources/Overlays/_Testing_Foundation/Attachments/_AttachableURLContainer.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation)
+#if !SWT_NO_FOUNDATION && canImport(Foundation)
 @_spi(Experimental) public import Testing
 public import Foundation
 

Sources/Overlays/_Testing_Foundation/Events/Clock+Date.swift

@@ -8,7 +8,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation) && !SWT_NO_UTC_CLOCK
+#if !SWT_NO_FOUNDATION && canImport(Foundation) && !SWT_NO_UTC_CLOCK
 @_spi(Experimental) @_spi(ForToolsIntegrationOnly) public import Testing
 public import Foundation
 

Sources/Testing/ABI/ABI.Record+Streaming.swift

@@ -8,9 +8,6 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
-#if canImport(Foundation) && (!SWT_NO_FILE_IO || !SWT_NO_ABI_ENTRY_POINT)
-private import Foundation
-
 extension ABI.Version {
   /// Post-process encoded JSON and write it to a file.
   ///
@@ -58,13 +55,13 @@ extension ABI.Version {
     let humanReadableOutputRecorder = Event.HumanReadableOutputRecorder()
     return { [eventHandler = eventHandlerCopy] event, context in
       if case .testDiscovered = event.kind, let test = context.test {
-        try? JSON.withEncoding(of: ABI.Record<Self>(encoding: test)) { testJSON in
+        JSON.withEncoding(of: ABI.Record<Self>(encoding: test)) { testJSON in
           eventHandler(testJSON)
         }
       } else {
         let messages = humanReadableOutputRecorder.record(event, in: context, verbosity: 0)
         if let eventRecord = ABI.Record<Self>(encoding: event, in: context, messages: messages) {
-          try? JSON.withEncoding(of: eventRecord, eventHandler)
+          JSON.withEncoding(of: eventRecord, eventHandler)
         }
       }
     }
@@ -96,12 +93,9 @@ extension ABI.Xcode16 {
         eventContext: Event.Context.Snapshot(snapshotting: context)
       )
       try? JSON.withEncoding(of: snapshot) { eventAndContextJSON in
-        eventAndContextJSON.withUnsafeBytes { eventAndContextJSON in
-          eventHandler(eventAndContextJSON)
-        }
+        eventHandler(eventAndContextJSON)
       }
     }
   }
 }
 #endif
-#endif

Sources/Testing/ABI/ABI.Record.swift

@@ -41,28 +41,15 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
 
-extension ABI.Record: Codable {
+extension ABI.Record: Decodable {
   private enum CodingKeys: String, CodingKey {
     case version
     case kind
     case payload
   }
 
-  func encode(to encoder: any Encoder) throws {
-    var container = encoder.container(keyedBy: CodingKeys.self)
-    try container.encode(V.versionNumber, forKey: .version)
-    switch kind {
-    case let .test(test):
-      try container.encode("test", forKey: .kind)
-      try container.encode(test, forKey: .payload)
-    case let .event(event):
-      try container.encode("event", forKey: .kind)
-      try container.encode(event, forKey: .payload)
-    }
-  }
-
   init(from decoder: any Decoder) throws {
     let container = try decoder.container(keyedBy: CodingKeys.self)
 
@@ -93,3 +80,22 @@ extension ABI.Record: Codable {
     }
   }
 }
+
+extension ABI.Record: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    var dict = [
+      "version": V.versionNumber.makeJSONValue()
+    ]
+
+    switch kind {
+    case let .test(test):
+      dict["kind"] = "test".makeJSONValue()
+      dict["payload"] = test.makeJSONValue()
+    case let .event(event):
+      dict["kind"] = "event".makeJSONValue()
+      dict["payload"] = event.makeJSONValue()
+    }
+
+    return dict.makeJSONValue()
+  }
+}

Sources/Testing/ABI/ABI.swift

@@ -20,7 +20,6 @@ extension ABI {
     /// The numeric representation of this ABI version.
     static var versionNumber: Int { get }
 
-#if canImport(Foundation) && (!SWT_NO_FILE_IO || !SWT_NO_ABI_ENTRY_POINT)
     /// Create an event handler that encodes events as JSON and forwards them to
     /// an ABI-friendly event handler.
     ///
@@ -39,7 +38,6 @@ extension ABI {
       encodeAsJSONLines: Bool,
       forwardingTo eventHandler: @escaping @Sendable (_ recordJSON: UnsafeRawBufferPointer) -> Void
     ) -> Event.Handler
-#endif
   }
 
   /// The current supported ABI version (ignoring any experimental versions.)
@@ -50,6 +48,10 @@ extension ABI {
 
 extension ABI {
 #if !SWT_NO_SNAPSHOT_TYPES
+#if SWT_NO_FOUNDATION || !canImport(Foundation)
+#error("Platform-specific misconfiguration: Foundation is required for snapshot type support")
+#endif
+
   /// A namespace and version type for Xcode 16 compatibility.
   ///
   /// - Warning: This type will be removed in a future update.

Sources/Testing/ABI/Encoded/ABI.EncodedAttachment.swift

@@ -27,6 +27,18 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
 
-extension ABI.EncodedAttachment: Codable {}
+extension ABI.EncodedAttachment: Decodable {}
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedAttachment: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    var dict = [String: JSON.Value]()
+    if let path {
+      dict["path"] = path.makeJSONValue()
+    }
+    return dict.makeJSONValue()
+  }
+}

Sources/Testing/ABI/Encoded/ABI.EncodedBacktrace.swift

@@ -31,14 +31,35 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
-
-extension ABI.EncodedBacktrace: Codable {
-  func encode(to encoder: any Encoder) throws {
-    try symbolicatedAddresses.encode(to: encoder)
-  }
+// MARK: - Decodable
 
+extension ABI.EncodedBacktrace: Decodable {
   init(from decoder: any Decoder) throws {
     self.symbolicatedAddresses = try [Backtrace.SymbolicatedAddress](from: decoder)
   }
 }
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedBacktrace: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    symbolicatedAddresses.makeJSONValue()
+  }
+}
+
+extension Backtrace.SymbolicatedAddress: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    var dict = [
+      "address": address.makeJSONValue()
+    ]
+
+    if let offset {
+      dict["offset"] = offset.makeJSONValue()
+    }
+    if let symbolName {
+      dict["symbolName"] = symbolName.makeJSONValue()
+    }
+
+    return dict.makeJSONValue()
+  }
+}

Sources/Testing/ABI/Encoded/ABI.EncodedError.swift

@@ -54,9 +54,22 @@ extension ABI.EncodedError: Error {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
 
-extension ABI.EncodedError: Codable {}
+extension ABI.EncodedError: Decodable {}
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedError: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    let dict = [
+      "description": description.makeJSONValue(),
+      "domain": domain.makeJSONValue(),
+      "code": code.makeJSONValue()
+    ]
+    return dict.makeJSONValue()
+  }
+}
 
 // MARK: - CustomTestStringConvertible
 

Sources/Testing/ABI/Encoded/ABI.EncodedEvent.swift

@@ -107,7 +107,36 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
 
-extension ABI.EncodedEvent: Codable {}
-extension ABI.EncodedEvent.Kind: Codable {}
+extension ABI.EncodedEvent: Decodable {}
+extension ABI.EncodedEvent.Kind: Decodable {}
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedEvent: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    var dict = [
+      "kind": kind.makeJSONValue(),
+      "instant": instant.makeJSONValue(),
+      "messages": messages.makeJSONValue(),
+    ]
+
+    if let issue {
+      dict["issue"] = issue.makeJSONValue()
+    }
+    if let _attachment {
+      dict["_attachment"] = _attachment.makeJSONValue()
+    }
+    if let testID {
+      dict["testID"] = testID.makeJSONValue()
+    }
+    if let _testCase {
+      dict["_testCase"] = _testCase.makeJSONValue()
+    }
+
+    return dict.makeJSONValue()
+  }
+}
+
+extension ABI.EncodedEvent.Kind: JSON.Serializable {}

Sources/Testing/ABI/Encoded/ABI.EncodedInstant.swift

@@ -35,6 +35,18 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
 
-extension ABI.EncodedInstant: Codable {}
+extension ABI.EncodedInstant: Decodable {}
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedInstant: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    let dict = [
+      "absolute": absolute.makeJSONValue(),
+      "since1970": since1970.makeJSONValue()
+    ]
+    return dict.makeJSONValue()
+  }
+}

Sources/Testing/ABI/Encoded/ABI.EncodedIssue.swift

@@ -33,7 +33,7 @@ extension ABI {
     var isKnown: Bool
 
     /// The location in source where this issue occurred, if available.
-    var sourceLocation: SourceLocation?
+    var sourceLocation: EncodedSourceLocation<V>?
 
     /// The backtrace where this issue occurred, if available.
     ///
@@ -51,7 +51,9 @@ extension ABI {
       case .error: .error
       }
       isKnown = issue.isKnown
-      sourceLocation = issue.sourceLocation
+      if let sourceLocation = issue.sourceLocation {
+        self.sourceLocation = EncodedSourceLocation<V>(encoding: sourceLocation)
+      }
       if let backtrace = issue.sourceContext.backtrace {
         _backtrace = EncodedBacktrace(encoding: backtrace, in: eventContext)
       }
@@ -62,7 +64,32 @@ extension ABI {
   }
 }
 
-// MARK: - Codable
+// MARK: - Decodable
+
+extension ABI.EncodedIssue: Decodable {}
+extension ABI.EncodedIssue.Severity: Decodable {}
+
+// MARK: - JSON.Serializable
+
+extension ABI.EncodedIssue: JSON.Serializable {
+  func makeJSONValue() -> JSON.Value {
+    var dict = [
+      "_severity": _severity.makeJSONValue(),
+      "isKnown": isKnown.makeJSONValue()
+    ]
+
+    if let sourceLocation {
+      dict["sourceLocation"] = sourceLocation.makeJSONValue()
+    }
+    if let _backtrace {
+      dict["_backtrace"] = _backtrace.makeJSONValue()
+    }
+    if let _error {
+      dict["_error"] = _error.makeJSONValue()
+    }
+
+    return dict.makeJSONValue()
+  }
+}
 
-extension ABI.EncodedIssue: Codable {}
-extension ABI.EncodedIssue.Severity: Codable {}
+extension ABI.EncodedIssue.Severity: JSON.Serializable {}