[clang-tools-extra] ad9259c - [include-cleaner] Add WalkAST unit tests for Objective-C constructs (#220763)

[via cfe-commits]

Author: Dave MacLachlan
Date: 2026-09-06T02:27:43Z
New Revision: ad9259c18b15f1d2c35e2f8748afc7fd13c2e976

URL: https://github.com/llvm/llvm-project/commit/ad9259c18b15f1d2c35e2f8748afc7fd13c2e976
DIFF: https://github.com/llvm/llvm-project/commit/ad9259c18b15f1d2c35e2f8748afc7fd13c2e976.diff

LOG: [include-cleaner] Add WalkAST unit tests for Objective-C constructs (#220763)

Adds test coverage for walking AST nodes related to:
- Objective-C interface inheritance (`@interface Derived : Base`)
- Forward class and protocol declarations (`@class` and `@protocol`)
- Objective-C interface types used as function arguments

This is just to make sure that current code is covered. No new features.

Added: 
    

Modified: 
    clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp

Removed: 
    


################################################################################
diff  --git a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
index 742a74aae41e3..23f0ec4468450 100644
--- a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
+++ b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
@@ -579,6 +579,8 @@ TEST(WalkAST, CleanupAttr) {
            "void foo() { __attribute__((__cleanup__(^freep))) char* x = 0; }");
 }
 
+// Objective-C Tests
+
 TEST(WalkAST, ObjCInterfaceTypeLoc) {
   testWalk(R"objc(
     @interface $explicit^MyClass
@@ -604,6 +606,18 @@ TEST(WalkAST, ObjCImplementationDeclDependsOnInterface) {
            {"-x", "objective-c"});
 }
 
+TEST(WalkAST, ObjCClassFunctionArg) {
+  testWalk(R"objc(
+    @interface $explicit^MyClass
+    @end
+  )objc",
+           R"objc(
+    void test(^MyClass *obj) {
+    }
+  )objc",
+           {"-x", "objective-c"});
+}
+
 TEST(WalkAST, ObjCMessageExprSelectorLoc) {
   testWalk(R"objc(
     @interface $implicit^MyClass
@@ -1000,6 +1014,18 @@ TEST(WalkAST, ObjCPropertyRefExprSuperNestedProtocolReceiver) {
            {"-x", "objective-c"});
 }
 
+TEST(WalkAST, ObjCInterfaceDeclInheritance) {
+  testWalk(R"objc(
+    @interface $explicit^BaseClass
+    @end
+  )objc",
+           R"objc(
+    @interface DerivedClass : ^BaseClass
+    @end
+  )objc",
+           {"-x", "objective-c"});
+}
+
 TEST(WalkAST, ObjCProtocolInType) {
   testWalk(R"objc(
     @protocol $explicit^MyProtocol
@@ -1132,6 +1158,28 @@ TEST(WalkAST, ObjCCompatibleAliasUsage) {
            {"-x", "objective-c"});
 }
 
+TEST(WalkAST, ObjCForwardClassDecl) {
+  testWalk(R"objc(
+    @interface MyClass
+    @end
+  )objc",
+           R"objc(
+    @class ^MyClass;
+  )objc",
+           {"-x", "objective-c"});
+}
+
+TEST(WalkAST, ObjCForwardProtocolDecl) {
+  testWalk(R"objc(
+    @protocol MyProtocol
+    @end
+  )objc",
+           R"objc(
+    @protocol ^MyProtocol;
+  )objc",
+           {"-x", "objective-c"});
+}
+
 TEST(WalkAST, ObjCIvarRefExprExplicit) {
   testWalk(R"objc(
     @interface MyClass {