Add correct libraries

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

lib/ArduinoJson/test/DynamicJsonBuffer_Array_Tests.cpp

@@ -0,0 +1,33 @@
+// 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>
+
+TEST(DynamicJsonBuffer_Array_Tests, GrowsWithArray) {
+  DynamicJsonBuffer jsonBuffer;
+
+  JsonArray &array = jsonBuffer.createArray();
+  ASSERT_EQ(JSON_ARRAY_SIZE(0), jsonBuffer.size());
+
+  array.add("hello");
+  ASSERT_EQ(JSON_ARRAY_SIZE(1), jsonBuffer.size());
+
+  array.add("world");
+  ASSERT_EQ(JSON_ARRAY_SIZE(2), jsonBuffer.size());
+}
+
+TEST(DynamicJsonBuffer_Array_Tests, CanAdd1000Values) {
+  DynamicJsonBuffer jsonBuffer;
+
+  JsonArray &array = jsonBuffer.createArray();
+
+  for (int i = 1; i <= 1000; i++) {
+    array.add("hello");
+    ASSERT_EQ(array.size(), i);
+  }
+}