add arduino json lib

#182

lib/ArduinoJson/test/JsonVariant/copy.cpp

@@ -0,0 +1,64 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonVariant copy") {
+  DynamicJsonBuffer _jsonBuffer;
+  JsonVariant _variant1;
+  JsonVariant _variant2;
+
+  SECTION("IntegersAreCopiedByValue") {
+    _variant1 = 123;
+    _variant2 = _variant1;
+    _variant1 = 456;
+
+    REQUIRE(123 == _variant2.as<int>());
+  }
+
+  SECTION("DoublesAreCopiedByValue") {
+    _variant1 = 123.45;
+    _variant2 = _variant1;
+    _variant1 = 456.78;
+
+    REQUIRE(123.45 == _variant2.as<double>());
+  }
+
+  SECTION("BooleansAreCopiedByValue") {
+    _variant1 = true;
+    _variant2 = _variant1;
+    _variant1 = false;
+
+    REQUIRE(_variant2.as<bool>());
+  }
+
+  SECTION("StringsAreCopiedByValue") {
+    _variant1 = "hello";
+    _variant2 = _variant1;
+    _variant1 = "world";
+
+    REQUIRE(std::string("hello") == _variant2.as<const char *>());
+  }
+
+  SECTION("ObjectsAreCopiedByReference") {
+    JsonObject &object = _jsonBuffer.createObject();
+
+    _variant1 = object;
+
+    object["hello"] = "world";
+
+    REQUIRE(1 == _variant1.as<JsonObject>().size());
+  }
+
+  SECTION("ArraysAreCopiedByReference") {
+    JsonArray &array = _jsonBuffer.createArray();
+
+    _variant1 = array;
+
+    array.add("world");
+
+    REQUIRE(1 == _variant1.as<JsonArray>().size());
+  }
+}