From 109d80e2ba8a4bdb57dfe7bedab548b66bb6d15b Mon Sep 17 00:00:00 2001
From: swarmer <swarmer@yandex-team.com>
Date: Tue, 27 Jan 2026 00:11:08 +0300
Subject: Forbid use of array types in UNIT_ASSERT conditions #30109
 commit_hash:bfc1eb4f21ecb804205db2c38e09cda4b5b9cea4

---
 library/cpp/testing/unittest/registar.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'library/cpp/testing')

diff --git a/library/cpp/testing/unittest/registar.h b/library/cpp/testing/unittest/registar.h
index b3b206ec5c1..16688659b8d 100644
--- a/library/cpp/testing/unittest/registar.h
+++ b/library/cpp/testing/unittest/registar.h
@@ -482,6 +482,7 @@ public:                       \
 //bool
 #define UNIT_ASSERT_C(A, C)                                                                             \
     do {                                                                                                \
+        static_assert(!std::is_array_v<std::remove_cvref_t<decltype(A)>>, "An array type always evaluates to true in a condition; this is likely an error in the condition expression."); \
         if (!(A)) {                                                                                     \
             UNIT_FAIL_IMPL("assertion failed", Sprintf("(%s) %s", #A, (::TStringBuilder() << C).data())); \
         }                                                                                               \
-- 
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