[clang-tools-extra] [WIP] Add a unit test for issue 141291 (PR #152962)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 updated https://github.com/llvm/llvm-project/pull/152962

>From 44d9772f6b7bbf8f522e632989378d651848e64a Mon Sep 17 00:00:00 2001
From: Nathan Ridge <zeratul976 at hotmail.com>
Date: Mon, 11 Aug 2025 03:18:46 -0400
Subject: [PATCH] [WIP] Add a unit test for issue 141291

---
 .../clangd/unittests/CodeCompleteTests.cpp    | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp b/clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
index 5a5d815076e2a..cf0c0e4252ac2 100644
--- a/clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
+++ b/clang-tools-extra/clangd/unittests/CodeCompleteTests.cpp
@@ -4394,6 +4394,34 @@ TEST(CompletionTest, SkipExplicitObjectParameter) {
               ElementsAre(AllOf(named("foo"), signature("(int arg)"),
                                 snippetSuffix("(${1:int arg})"))));
 }
+
+TEST(CompletionTest, MemberAccessInExplicitObjMemfn) {
+  Annotations Code(R"cpp(
+    struct A {
+      int member;
+      void foo(this A& self) {
+        // Should not offer `member` here, since it needs to be 
+        // referenced as `self.member`.
+        mem^
+      }
+    };
+  )cpp");
+
+  auto TU = TestTU::withCode(Code.code());
+  TU.ExtraArgs = {"-std=c++23"};
+
+  auto Preamble = TU.preamble();
+  ASSERT_TRUE(Preamble);
+
+  CodeCompleteOptions Opts{};
+
+  MockFS FS;
+  auto Inputs = TU.inputs(FS);
+  auto Result = codeComplete(testPath(TU.Filename), Code.point(),
+                             Preamble.get(), Inputs, Opts);
+
+  EXPECT_THAT(Result.Completions, ElementsAre());
+}
 } // namespace
 } // namespace clangd
 } // namespace clang