1 files changed, 53 insertions, 0 deletions
diff --git a/library/cpp/yson/node/node_io_ut.cpp b/library/cpp/yson/node/node_io_ut.cpp
new file mode 100644
index 00000000000..90720cd3a1b
--- /dev/null
+++ b/library/cpp/yson/node/node_io_ut.cpp
@@ -0,0 +1,53 @@
+#include "node_io.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/stream/mem.h>
+
+using namespace NYson;
+
+namespace {
+    void GenerateDeepJson(TStringStream& stream, ui64 depth) {
+        stream << "{\"key\":";
+        for (ui32 i = 0; i < depth - 1; ++i) {
+            stream << "[";
+        }
+        for (ui32 i = 0; i < depth - 1; ++i) {
+            stream << "]";
+        }
+        stream << "}";
+    }
+}
+
+Y_UNIT_TEST_SUITE(TestNodeFromJsonStringIterativeTest) {
+    Y_UNIT_TEST(NoCrashOn1e5Brackets) {
+        constexpr ui32 brackets = static_cast<ui32>(1e5);
+
+        TStringStream jsonStream;
+        GenerateDeepJson(jsonStream, brackets);
+
+        UNIT_ASSERT_EXCEPTION(
+            NYT::NodeFromJsonStringIterative(jsonStream.Str()),
+            std::exception);
+    }
+
+    Y_UNIT_TEST(NoCrashOn1025Brackets) {
+        constexpr ui32 brackets = 1025;
+
+        TStringStream jsonStream;
+        GenerateDeepJson(jsonStream, brackets);
+
+        UNIT_ASSERT_EXCEPTION(
+            NYT::NodeFromJsonStringIterative(jsonStream.Str()),
+            std::exception);
+    }
+
+    Y_UNIT_TEST(NoErrorOn1024Brackets) {
+        constexpr ui32 brackets = 1024;
+
+        TStringStream jsonStream;
+        GenerateDeepJson(jsonStream, brackets);
+
+        UNIT_ASSERT_NO_EXCEPTION(NYT::NodeFromJsonStringIterative(jsonStream.Str()));
+    }
+}