Recore SwiftSyntaxMacrosTestSupport on top of SwiftSyntaxMacrosTestSupportFrameworkAgnostic

Author: ahoppen

Package.swift

@@ -223,6 +223,7 @@ let package = Package(
         "SwiftIDEUtils",
         "SwiftParser",
         "SwiftSyntaxMacros",
+        "SwiftSyntaxMacrosTestSupportFrameworkAgnostic",
         "SwiftSyntaxMacroExpansion",
       ]
     ),

Release Notes/600.md

@@ -95,6 +95,10 @@
   - Description: `Range<AbsolutePosition>` gained a few convenience functions inspired from `ByteSourceRange`: `init(position:length:)`,  `length`, `overlapsOrTouches`
   - Pull request: https://github.com/apple/swift-syntax/pull/2587
 
+- `SwiftSyntaxMacrosTestSupportFrameworkAgnostic`
+  - Description: A version of the `SwiftSyntaxMacrosTestSupport` module that doesn't depend on `Foundation` or `XCTest` and can thus be used to write macro tests using `swift-testing`. Since swift-syntax can't depend on swift-testing (which would incur a circular dependency since swift-testing depends on swift-syntax), users need to manually specify a failure handler that fails the swift-testing test.
+  - Pull request: https://github.com/apple/swift-syntax/pull/2647
+
 ## API Behavior Changes
 
 ## Deprecations