From 8989337a91ecb98e5e6ac5893b2ae1cc839d232c Mon Sep 17 00:00:00 2001
From: vasiliy-mikhailov <vasiliy-mikhailov@users.noreply.github.com>
Date: Mon, 22 Jun 2026 21:58:35 +0300
Subject: [PATCH] Add unit tests for JsonUtils

Additive unit tests only - no existing test or production code changed.
---
 src/test/java/io/json/compare/util/JsonUtilsTest.java | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/test/java/io/json/compare/util/JsonUtilsTest.java b/src/test/java/io/json/compare/util/JsonUtilsTest.java
index 4c1fcdf..e23aca7 100644
--- a/src/test/java/io/json/compare/util/JsonUtilsTest.java
+++ b/src/test/java/io/json/compare/util/JsonUtilsTest.java
@@ -19,6 +19,12 @@ public void convertStringToJson() throws IOException {
         assertEquals(2, JsonUtils.toJson("{\"a\":2}").get("a").asInt());
     }
 
+    @Test
+    public void toJsonWithJsonNodeReturnsSameInstance() throws IOException {
+        com.fasterxml.jackson.databind.JsonNode node = JsonUtils.toJson("{\"x\":42}");
+        assertSame(node, JsonUtils.toJson(node));
+    }
+
     @Test
     public void convertObjectToJson() throws IOException {
         Map<String, Integer> map = new HashMap<>();