312797 2026-04-20 12:29:22 -0700 [Swift Testing] Add Swift-callable wrapper around InstanceMethodSwizzler for TestWebKitAPI 2026-05-08 00:07:09 -0700 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 zakr zakr webkit-bug-importer oldest_to_newest 2202329 0 zakr 2026-04-20 12:29:22 -0700 The C++ InstanceMethodSwizzler RAII helper is gated behind #ifdef __cplusplus and is not callable from Swift, so Swift tests in TestWebKitAPI cannot mock Objective-C runtime behavior. This is the first piece of infrastructure needed to port AppKit-heavy tests (NSMenu pop-ups, gesture recognizers, drag-and-drop) to the new Swift Testing framework. Add TestMethodSwizzler, a thin @interface around InstanceMethodSwizzler that takes a block, runs it through imp_implementationWithBlock, and restores the original implementation in -dealloc. Swift callers hold the swizzler in a local binding for as long as the swizzle should remain in effect, mirroring the C++ RAII pattern. Add a smoke test that swizzles a no-arg Int-returning method on a Swift @objc class, verifies the replacement IMP is called, and verifies the original is restored once the swizzler is dropped. 2202330 1 webkit-bug-importer 2026-04-20 12:29:28 -0700 <rdar://problem/175186623> 2202341 2 zakr 2026-04-20 12:53:56 -0700 Pull request: https://github.com/WebKit/WebKit/pull/63141 2208882 3 ews-feeder 2026-05-08 00:07:07 -0700 Committed 312863@main (a41a909424f0): <https://commits.webkit.org/312863@main> Reviewed commits have been landed. Closing PR #63141 and removing active labels.