Added nesting() to JsonArray, JsonDocument, JsonObject, and JsonVariant

test/JsonObject/nesting.cpp

@@ -0,0 +1,35 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonObject::nesting()") {
+  DynamicJsonDocument doc(4096);
+  JsonObject obj = doc.to<JsonObject>();
+
+  SECTION("return 0 if uninitialized") {
+    JsonObject unitialized;
+    REQUIRE(unitialized.nesting() == 0);
+  }
+
+  SECTION("returns 1 for empty object") {
+    REQUIRE(obj.nesting() == 1);
+  }
+
+  SECTION("returns 1 for flat object") {
+    obj["hello"] = "world";
+    REQUIRE(obj.nesting() == 1);
+  }
+
+  SECTION("returns 2 with nested array") {
+    obj.createNestedArray("nested");
+    REQUIRE(obj.nesting() == 2);
+  }
+
+  SECTION("returns 2 with nested object") {
+    obj.createNestedObject("nested");
+    REQUIRE(obj.nesting() == 2);
+  }
+}