Add more tests for JsonVariantConst

extras/tests/JsonVariantConst/nesting.cpp

@@ -0,0 +1,31 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2024, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonVariantConst::nesting()") {
+  JsonDocument doc;
+  JsonVariantConst var = doc.to<JsonVariant>();
+
+  SECTION("return 0 if unbound") {
+    JsonVariantConst unbound;
+    REQUIRE(unbound.nesting() == 0);
+  }
+
+  SECTION("returns 0 for string") {
+    doc.set("hello");
+    REQUIRE(var.nesting() == 0);
+  }
+
+  SECTION("returns 1 for empty object") {
+    doc.to<JsonObject>();
+    REQUIRE(var.nesting() == 1);
+  }
+
+  SECTION("returns 1 for empty array") {
+    doc.to<JsonArray>();
+    REQUIRE(var.nesting() == 1);
+  }
+}