Reduced memory consumption by not duplicating spaces and comments

test/DynamicJsonBuffer_String_Tests.cpp

@@ -0,0 +1,48 @@
+// Copyright Benoit Blanchon 2014-2016
+// 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_String_Tests, WorksWhenBufferIsBigEnough) {
+  DynamicJsonBuffer jsonBuffer(6);
+
+  DynamicJsonBuffer::String str = jsonBuffer.startString();
+  str.append('h');
+  str.append('e');
+  str.append('l');
+  str.append('l');
+  str.append('o');
+
+  ASSERT_STREQ("hello", str.c_str());
+}
+
+TEST(DynamicJsonBuffer_String_Tests, GrowsWhenBufferIsTooSmall) {
+  DynamicJsonBuffer jsonBuffer(5);
+
+  DynamicJsonBuffer::String str = jsonBuffer.startString();
+  str.append('h');
+  str.append('e');
+  str.append('l');
+  str.append('l');
+  str.append('o');
+
+  ASSERT_STREQ("hello", str.c_str());
+}
+
+TEST(DynamicJsonBuffer_String_Tests, SizeIncreases) {
+  DynamicJsonBuffer jsonBuffer(5);
+
+  DynamicJsonBuffer::String str = jsonBuffer.startString();
+  ASSERT_EQ(0, jsonBuffer.size());
+
+  str.append('h');
+  ASSERT_EQ(1, jsonBuffer.size());
+
+  str.c_str();
+  ASSERT_EQ(2, jsonBuffer.size());
+}