Splitted the indentation tests into 3 files

JsonGeneratorTests/Intented_String_Tests.cpp

@@ -0,0 +1,50 @@
+/*
+* Arduino JSON library
+* Benoit Blanchon 2014 - MIT License
+*/
+
+#include "CppUnitTest.h"
+#include "IndentedPrintDecorator.h"
+#include "StringBuilder.h"
+
+using namespace ArduinoJson::Internals;
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace JsonGeneratorTests
+{
+    TEST_CLASS(IntentedPrintTests)
+    {
+        char buffer[1024];
+        size_t returnValue;
+
+    public:
+        
+        TEST_METHOD(EmptyString)
+        {
+            whenInputIs("");
+            outputMustBe("");
+        }
+
+        TEST_METHOD(TrickyCharacters)
+        {
+            whenInputIs ("\":\\\"',\"");
+            outputMustBe("\":\\\"',\"");
+        }
+               
+    private:
+
+        void whenInputIs(const char input[])
+        {
+            StringBuilder sb(buffer, sizeof(buffer));
+            IndentedPrintDecorator decorator(sb);
+
+            returnValue = decorator.print(input);
+        }
+
+        void outputMustBe(const char* expected)
+        {
+            Assert::AreEqual(expected, buffer);
+            Assert::AreEqual(strlen(expected), returnValue);
+        }
+    };
+}