Add correct libraries

Arduino IDE: Place libraries in portable/sketchbook/libraries folder.
PlatformIO: Place libraries in your projects lib folder.

lib/ArduinoJson/test/JsonArray_Basic_Tests.cpp

@@ -0,0 +1,41 @@
+// Copyright Benoit Blanchon 2014-2017
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+// If you like this project, please add a star!
+
+#include <ArduinoJson.h>
+#include <gtest/gtest.h>
+
+#define TEST_(name) TEST(JsonArray_Basic_Tests, name)
+
+TEST_(SuccessIsTrue) {
+  DynamicJsonBuffer _jsonBuffer;
+  JsonArray& array = _jsonBuffer.createArray();
+
+  EXPECT_TRUE(array.success());
+}
+
+TEST_(InitialSizeIsZero) {
+  DynamicJsonBuffer _jsonBuffer;
+  JsonArray& array = _jsonBuffer.createArray();
+
+  EXPECT_EQ(0U, array.size());
+}
+
+TEST_(CreateNestedArray) {
+  DynamicJsonBuffer _jsonBuffer;
+  JsonArray& array = _jsonBuffer.createArray();
+
+  JsonArray& arr = array.createNestedArray();
+  EXPECT_EQ(&arr, &array[0].as<JsonArray&>());
+}
+
+TEST_(CreateNestedObject) {
+  DynamicJsonBuffer _jsonBuffer;
+  JsonArray& array = _jsonBuffer.createArray();
+
+  JsonObject& obj = array.createNestedObject();
+  EXPECT_EQ(&obj, &array[0].as<JsonObject&>());
+}