chore: add tests for material dumpers

test/ObjCommonTestUtils/NormalizedJson.cpp

@@ -0,0 +1,11 @@
+#include "NormalizedJson.h"
+
+#include <nlohmann/json.hpp>
+
+using namespace nlohmann;
+
+std::string JsonNormalized(const std::string& str0)
+{
+    const json j0 = json::parse(str0);
+    return j0.dump(4);
+}

test/ObjCommonTestUtils/NormalizedJson.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <string>
+
+std::string JsonNormalized(const std::string& str0);