From bf466e83f2aebf164860bcc0fcc78f4c8e615ea5 Mon Sep 17 00:00:00 2001
From: Adlai Holler <adlai@icloud.com>
Date: Wed, 3 Apr 2019 17:46:26 -0700
Subject: [PATCH] Fix the stub for layerActionForKey: to let CA continue the
 search (#1441)

* Fix the stub for layerActionForKey: to let CA continue the search

* Kick CI
---
 Source/ASDisplayNode.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/ASDisplayNode.mm b/Source/ASDisplayNode.mm
index 8eeba8cd9..cb1b3c68b 100644
--- a/Source/ASDisplayNode.mm
+++ b/Source/ASDisplayNode.mm
@@ -106,7 +106,10 @@ BOOL ASDisplayNodeNeedsSpecialPropertiesHandling(BOOL isSynchronous, BOOL isLaye
 void StubImplementationWithNoArgs(id receiver, SEL _cmd) {}
 void StubImplementationWithSizeRange(id receiver, SEL _cmd, ASSizeRange sr) {}
 void StubImplementationWithTwoInterfaceStates(id receiver, SEL _cmd, ASInterfaceState s0, ASInterfaceState s1) {}
-id StubLayerActionImplementation(id receiver, SEL _cmd, NSString *key) { return (id)kCFNull; }
+
+/// Returning nil here won't trigger unwanted default actions, because we override
+/// +defaultActionForKey: to return kCFNull.
+id StubLayerActionImplementation(id receiver, SEL _cmd, NSString *key) { return nil; }
 
 /**
  *  Returns ASDisplayNodeFlags for the given class/instance. instance MAY BE NIL.